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Contents Denial-of-service attack In computing, a denial-of-service attack (DoS attack /dɒs/ doss) is a cyberattack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Denial of service is typically accomplished by flooding the targeted machine or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled. The range of attacks varies widely, spanning from inundating a server with millions of requests to slow its performance, overwhelming a server with a substantial amount of invalid data, to submitting requests with an illegitimate IP address. In a distributed denial-of-service attack (DDoS attack /ˈdiː.dɒs/ DEE-doss), the incoming traffic flooding the victim originates from many different sources. More sophisticated strategies are required to mitigate this type of attack; simply attempting to block a single source is insufficient. A DDoS attack is analogous to a group of people crowding the entry door of a shop, making it hard for legitimate customers to enter, thus disrupting trade and losing the business money. Criminal perpetrators of DDoS attacks often target sites or services hosted on high-profile web servers such as banks or credit card payment gateways. Revenge and blackmail, as well as hacktivism, can motivate these attacks. History Panix, the third-oldest Internet service provider (ISP) in the world, was the target of what is thought to be the first DoS attack. On September 6, 1996, Panix was subject to a SYN flood attack, which brought down its services for several days while hardware vendors, notably Cisco, figured out a proper defense. The release of sample code during the event led to the online attack of Sprint, EarthLink, E-Trade, and other major corporations in the year to follow. In February 2020, Amazon Web Services experienced an attack with a peak volume of 2.3 Tb/s. In July 2021, Cloudflare boasted of protecting its client from a DDoS attack from a global Mirai botnet that was up to 17.2 million requests per second. Russian DDoS prevention provider Yandex said it blocked an HTTP pipelining DDoS attack on Sept. 5. 2021 that originated from unpatched Mikrotik networking gear. In the first half of 2022, the Russian invasion of Ukraine significantly shaped the cyberthreat landscape, with an increase in cyberattacks attributed to both state-sponsored actors and global hacktivist activities. The most notable event was a DDoS attack in February, the largest Ukraine has encountered, disrupting government and financial sector services. This wave of cyber aggression extended to Western allies like the UK, the US, and Germany. Particularly, the UK's financial sector saw an increase in DDoS attacks from nation-state actors and hacktivists, aimed at undermining Ukraine's allies. In February 2023, Cloudflare faced a 71 million/requests per second attack which Cloudflare claims was the largest HTTP DDoS attack at the time. HTTP DDoS attacks are measured by HTTP requests per second instead of packets per second or bits per second. On July 10, 2023, the fanfiction platform Archive of Our Own (AO3) faced DDoS attacks, disrupting services. Anonymous Sudan, claiming the attack for religious and political reasons, was viewed skeptically by AO3 and experts. Flashpoint, a threat intelligence vendor, noted the group's past activities but doubted their stated motives. AO3, supported by the non-profit Organization for Transformative Works (OTW) and reliant on donations, is unlikely to meet the $30,000 Bitcoin ransom. In August 2023, the group of hacktivists NoName057 targeted several Italian financial institutions, through the execution of slow DoS attacks. On 14 January 2024, they executed a DDoS attack on Swiss federal websites, prompted by President Zelensky's attendance at the Davos World Economic Forum. Switzerland's National Cyber Security Centre quickly mitigated the attack, ensuring core federal services remained secure, despite temporary accessibility issues on some websites. In October 2023, exploitation of a new vulnerability in the HTTP/2 protocol resulted in the record for largest HTTP DDoS attack being broken twice, once with a 201 million requests per second attack observed by Cloudflare, and again with a 398 million requests per second attack observed by Google. In August 2024, Global Secure Layer observed and reported on a record-breaking packet DDoS at 3.15 billion packets per second, which targeted an undisclosed number of unofficial Minecraft game servers. In October 2024, the Internet Archive faced two severe DDoS attacks that brought the site completely offline, immediately following a previous attack that leaked records of over 31 million of the site's users. The hacktivist group SN_Blackmeta claimed the DDoS attack as retribution for American involvement in the Gaza war, despite the Internet Archive being unaffiliated with the United States government; however, their link with the preceding data leak remains unclear. Cloudflare claims to have recorded and successfully autonomously blocked a 40-second DDoS attack on 23 September 2025, that reached a peak volume of 22.2 Tb/s, which would be the largest DDoS attack to date. Cloudflare has stated that over 404,000 source IPs were used to target one IP address, and that the source IPs were not spoofed. According to Cloudflare, this came after several other large-scale DDoS attacks, each consecutively beating the previous record, including a 7.3 Tb/s attack in May 2025 and an 11.5 Tb/s attack on 1 September, 2025. Types Denial-of-service attacks are characterized by an explicit attempt by attackers to prevent legitimate use of a service. There are two general forms of DoS attacks: those that crash services and those that flood services. The most serious attacks are distributed. A distributed denial-of-service (DDoS) attack occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. A DDoS attack uses more than one unique IP address or machines, often from thousands of hosts infected with malware. A distributed denial of service attack typically involves more than around 3–5 nodes on different networks; fewer nodes may qualify as a DoS attack but is not a DDoS attack. Most of the time, attackers operate from an endpoint that is not their intended target, for example using another user's machine to attack a server. By using another unsuspecting endpoint if it becomes compromised they can then move onto another workstation within the enterprise network. However, even faking lots of users and executing a DoS attack, a single attacker with few computers is still very limited in the amount of traffic they can generate. If the attacks are from multiple sources, it can be difficult for the host to identify and stop them. The scale of DDoS attacks has continued to rise over recent years, by 2016 exceeding a terabit per second. Some common examples of DDoS attacks are UDP flooding, SYN flooding and DNS amplification. A yo-yo attack is a specific type of DoS/DDoS aimed at cloud-hosted applications which use autoscaling. During the attack, an attacker repeatedly changes between sending a lot of traffic (which causes a scale-up) and stopping the burst (causing a scale-down as a result). An application layer DDoS attack (sometimes referred to as layer 7 DDoS attack) is a form of DDoS attack where attackers target application-layer processes. The attack over-exercises specific functions or features of a website with the intention to disable those functions or features. This application-layer attack is different from an entire network attack, and is often used against financial institutions to distract IT and security personnel from security breaches. In 2013, application-layer DDoS attacks represented 20% of all DDoS attacks. According to research by Akamai Technologies, there have been "51 percent more application layer attacks" from Q4 2013 to Q4 2014 and "16 percent more" from Q3 2014 to Q4 2014. In November 2017; Junade Ali, an engineer at Cloudflare noted that whilst network-level attacks continue to be of high capacity, they were occurring less frequently. Ali further noted that although network-level attacks were becoming less frequent, data from Cloudflare demonstrated that application-layer attacks were still showing no sign of slowing down. The simplest DoS attack relies primarily on brute force, flooding the target with an overwhelming flux of packets, oversaturating its connection bandwidth or depleting the target's system resources. Bandwidth-saturating floods rely on the attacker's ability to generate the overwhelming flux of packets. A common way of achieving this today is via distributed denial-of-service, employing a botnet. An application layer DDoS attack is done mainly for specific targeted purposes, including disrupting transactions and access to databases. It requires fewer resources than network layer attacks but often accompanies them. An attack may be disguised to look like legitimate traffic, except it targets specific application packets or functions. The attack on the application layer can disrupt services such as the retrieval of information or search functions on a website. An advanced persistent DoS (APDoS) is associated with an advanced persistent threat and requires specialized DDoS mitigation. These attacks can persist for weeks; the longest continuous period noted so far lasted 38 days. This attack involved approximately 50+ petabits (50,000+ terabits) of malicious traffic. Attackers in this scenario may tactically switch between several targets to create a diversion to evade defensive DDoS countermeasures but all the while eventually concentrating the main thrust of the attack onto a single victim. In this scenario, attackers with continuous access to several very powerful network resources are capable of sustaining a prolonged campaign generating enormous levels of unamplified DDoS traffic. APDoS attacks are characterized by: Some vendors provide so-called booter or stresser services, which have simple web-based front ends, and accept payment over the web. Marketed and promoted as stress-testing tools, they can be used to perform unauthorized denial-of-service attacks, and allow technically unsophisticated attackers access to sophisticated attack tools. Usually powered by a botnet, the traffic produced by a consumer stresser can range anywhere from 5-50 Gbit/s, which can, in most cases, deny the average home user internet access. A Markov-modulated denial-of-service attack occurs when the attacker disrupts control packets using a hidden Markov model. A setting in which Markov-model based attacks are prevalent is online gaming as the disruption of the control packet undermines game play and system functionality. Symptoms The United States Computer Emergency Readiness Team (US-CERT) has identified symptoms of a denial-of-service attack to include: Attack techniques In cases such as MyDoom and Slowloris, the tools are embedded in malware and launch their attacks without the knowledge of the system owner. Stacheldraht is a classic example of a DDoS tool. It uses a layered structure where the attacker uses a client program to connect to handlers which are compromised systems that issue commands to the zombie agents which in turn facilitate the DDoS attack. Agents are compromised via the handlers by the attacker using automated routines to exploit vulnerabilities in programs that accept remote connections running on the targeted remote hosts. Each handler can control up to a thousand agents. In other cases a machine may become part of a DDoS attack with the owner's consent, for example, in Operation Payback organized by the group Anonymous. The Low Orbit Ion Cannon has typically been used in this way. Along with High Orbit Ion Cannon a wide variety of DDoS tools are available today, including paid and free versions, with different features available. There is an underground market for these in hacker-related forums and IRC channels. Application-layer attacks employ DoS-causing exploits and can cause server-running software to fill the disk space or consume all available memory or CPU time. Attacks may use specific packet types or connection requests to saturate finite resources by, for example, occupying the maximum number of open connections or filling the victim's disk space with logs. An attacker with shell-level access to a victim's computer may slow it until it is unusable or crash it by using a fork bomb. Another kind of application-level DoS attack is XDoS (or XML DoS) which can be controlled by modern web application firewalls (WAFs). All attacks belonging to the category of timeout exploiting. Slow DoS attacks implement an application-layer attack. Examples of threats are Slowloris, establishing pending connections with the victim, or SlowDroid, an attack running on mobile devices. Another target of DDoS attacks may be to produce added costs for the application operator, when the latter uses resources based on cloud computing. In this case, normally application-used resources are tied to a needed quality of service (QoS) level (e.g. responses should be less than 200 ms) and this rule is usually linked to automated software (e.g. Amazon CloudWatch) to raise more virtual resources from the provider to meet the defined QoS levels for the increased requests. The main incentive behind such attacks may be to drive the application owner to raise the elasticity levels to handle the increased application traffic, to cause financial losses, or force them to become less competitive. A banana attack is another particular type of DoS. It involves redirecting outgoing messages from the client back onto the client, preventing outside access, as well as flooding the client with the sent packets. A LAND attack is of this type. Pulsing zombies are compromised computers that are directed to launch intermittent and short-lived floodings of victim websites with the intent of merely slowing it rather than crashing it. This type of attack, referred to as degradation-of-service, can be more difficult to detect and can disrupt and hamper connection to websites for prolonged periods of time, potentially causing more overall disruption than a denial-of-service attack. Exposure of degradation-of-service attacks is complicated further by the matter of discerning whether the server is really being attacked or is experiencing higher than normal legitimate traffic loads. If an attacker mounts an attack from a single host, it would be classified as a DoS attack. Any attack against availability would be classed as a denial-of-service attack. On the other hand, if an attacker uses many systems to simultaneously launch attacks against a remote host, this would be classified as a DDoS attack. Malware can carry DDoS attack mechanisms; one of the better-known examples of this was MyDoom. Its DoS mechanism was triggered on a specific date and time. This type of DDoS involved hardcoding the target IP address before releasing the malware and no further interaction was necessary to launch the attack. A system may also be compromised with a trojan containing a zombie agent. Attackers can also break into systems using automated tools that exploit flaws in programs that listen for connections from remote hosts. This scenario primarily concerns systems acting as servers on the web. Stacheldraht is a classic example of a DDoS tool. It uses a layered structure where the attacker uses a client program to connect to handlers, which are compromised systems that issue commands to the zombie agents, which in turn facilitate the DDoS attack. Agents are compromised via the handlers by the attacker. Each handler can control up to a thousand agents. In some cases a machine may become part of a DDoS attack with the owner's consent, for example, in Operation Payback, organized by the group Anonymous. These attacks can use different types of internet packets such as TCP, UDP, ICMP, etc. These collections of compromised systems are known as botnets. DDoS tools like Stacheldraht still use classic DoS attack methods centered on IP spoofing and amplification like smurf attacks and fraggle attacks (types of bandwidth consumption attacks). SYN floods (a resource starvation attack) may also be used. Newer tools can use DNS servers for DoS purposes. Unlike MyDoom's DDoS mechanism, botnets can be turned against any IP address. Script kiddies use them to deny the availability of well known websites to legitimate users. More sophisticated attackers use DDoS tools for the purposes of extortion – including against their business rivals. It has been reported that there are new attacks from internet of things (IoT) devices that have been involved in denial of service attacks. In one noted attack that was made peaked at around 20,000 requests per second which came from around 900 CCTV cameras. UK's GCHQ has tools built for DDoS, named PREDATORS FACE and ROLLING THUNDER. Simple attacks such as SYN floods may appear with a wide range of source IP addresses, giving the appearance of a distributed DoS. These flood attacks do not require completion of the TCP three-way handshake and attempt to exhaust the destination SYN queue or the server bandwidth. Because the source IP addresses can be trivially spoofed, an attack could come from a limited set of sources, or may even originate from a single host. Stack enhancements such as SYN cookies may be effective mitigation against SYN queue flooding but do not address bandwidth exhaustion. In 2022, TCP attacks were the leading method in DDoS incidents, accounting for 63% of all DDoS activity. This includes tactics like TCP SYN, TCP ACK, and TCP floods. With TCP being the most widespread networking protocol, its attacks are expected to remain prevalent in the DDoS threat scene. In 2015, DDoS botnets such as DD4BC grew in prominence, taking aim at financial institutions. Cyber-extortionists typically begin with a low-level attack and a warning that a larger attack will be carried out if a ransom is not paid in bitcoin. Security experts recommend targeted websites to not pay the ransom. The attackers tend to get into an extended extortion scheme once they recognize that the target is ready to pay. First discovered in 2009, the HTTP slow POST attack sends a complete, legitimate HTTP POST header, which includes a Content-Length field to specify the size of the message body to follow. However, the attacker then proceeds to send the actual message body at an extremely slow rate (e.g. 1 byte/110 seconds). Due to the entire message being correct and complete, the target server will attempt to obey the Content-Length field in the header, and wait for the entire body of the message to be transmitted, which can take a very long time. The attacker establishes hundreds or even thousands of such connections until all resources for incoming connections on the victim server are exhausted, making any further connections impossible until all data has been sent. It is notable that unlike many other DDoS or DDoS attacks, which try to subdue the server by overloading its network or CPU, an HTTP slow POST attack targets the logical resources of the victim, which means the victim would still have enough network bandwidth and processing power to operate. Combined with the fact that the Apache HTTP Server will, by default, accept requests up to 2GB in size, this attack can be particularly powerful. HTTP slow POST attacks are difficult to differentiate from legitimate connections and are therefore able to bypass some protection systems. OWASP, an open source web application security project, released a tool to test the security of servers against this type of attack. A Challenge Collapsar (CC) attack is an attack where standard HTTP requests are sent to a targeted web server frequently. The Uniform Resource Identifiers (URIs) in the requests require complicated time-consuming algorithms or database operations which may exhaust the resources of the targeted web server. In 2004, a Chinese hacker nicknamed KiKi invented a hacking tool to send these kinds of requests to attack a NSFOCUS firewall named Collapsar, and thus the hacking tool was known as Challenge Collapsar, or CC for short. Consequently, this type of attack got the name CC attack. A smurf attack relies on misconfigured network devices that allow packets to be sent to all computer hosts on a particular network via the broadcast address of the network, rather than a specific machine. The attacker will send large numbers of IP packets with the source address faked to appear to be the address of the victim. Most devices on a network will, by default, respond to this by sending a reply to the source IP address. If the number of machines on the network that receive and respond to these packets is very large, the victim's computer will be flooded with traffic. This overloads the victim's computer and can even make it unusable during such an attack. Ping flood is based on sending the victim an overwhelming number of ping packets, usually using the ping command from Unix-like hosts.[a] It is very simple to launch, the primary requirement being access to greater bandwidth than the victim. Ping of death is based on sending the victim a malformed ping packet, which will lead to a system crash on a vulnerable system. The BlackNurse attack is an example of an attack taking advantage of the required Destination Port Unreachable ICMP packets. A nuke is an old-fashioned denial-of-service attack against computer networks consisting of fragmented or otherwise invalid ICMP packets sent to the target, achieved by using a modified ping utility to repeatedly send this corrupt data, thus slowing down the affected computer until it comes to a complete stop. A specific example of a nuke attack that gained some prominence is the WinNuke, which exploited the vulnerability in the NetBIOS handler in Windows 95. A string of out-of-band data was sent to TCP port 139 of the victim's machine, causing it to lock up and display a Blue Screen of Death. Attackers have found a way to exploit a number of bugs in peer-to-peer servers to initiate DDoS attacks. The most aggressive of these peer-to-peer-DDoS attacks exploits DC++.[citation needed][ambiguous] With peer-to-peer there is no botnet and the attacker does not have to communicate with the clients it subverts. Instead, the attacker acts as a puppet master, instructing clients of large peer-to-peer file sharing hubs to disconnect from their peer-to-peer network and to connect to the victim's website instead. Permanent denial-of-service (PDoS), also known loosely as phlashing, is an attack that damages a system so badly that it requires replacement or reinstallation of hardware. Unlike the distributed denial-of-service attack, a PDoS attack exploits security flaws which allow remote administration on the management interfaces of the victim's hardware, such as routers, printers, or other networking hardware. The attacker uses these vulnerabilities to replace a device's firmware with a modified, corrupt, or defective firmware image—a process which when done legitimately is known as flashing. The intent is to brick the device, rendering it unusable for its original purpose until it can be repaired or replaced. The PDoS is a pure hardware-targeted attack that can be much faster and requires fewer resources than using a botnet in a DDoS attack. Because of these features, and the potential and high probability of security exploits on network-enabled embedded devices, this technique has come to the attention of numerous hacking communities. BrickerBot, a piece of malware that targeted IoT devices, used PDoS attacks to disable its targets. PhlashDance is a tool created by Rich Smith (an employee of Hewlett-Packard's Systems Security Lab) used to detect and demonstrate PDoS vulnerabilities at the 2008 EUSecWest Applied Security Conference in London, UK. A distributed denial-of-service attack may involve sending forged requests of some type to a very large number of computers that will reply to the requests. Using Internet Protocol address spoofing, the source address is set to that of the targeted victim, which means all the replies will go to (and flood) the target. This reflected attack form is sometimes called a distributed reflective denial-of-service (DRDoS) attack. ICMP echo request attacks (Smurf attacks) can be considered one form of reflected attack, as the flooding hosts send Echo Requests to the broadcast addresses of mis-configured networks, thereby enticing hosts to send Echo Reply packets to the victim. Some early DDoS programs implemented a distributed form of this attack. Amplification attacks are used to magnify the bandwidth that is sent to a victim. Many services can be exploited to act as reflectors, some harder to block than others. US-CERT have observed that different services may result in different amplification factors, as tabulated below: DNS amplification attacks involves an attacker sending a DNS name lookup request to one or more public DNS servers, spoofing the source IP address of the targeted victim. The attacker tries to request as much information as possible, thus amplifying the DNS response that is sent to the targeted victim. Since the size of the request is significantly smaller than the response, the attacker is easily able to increase the amount of traffic directed at the target. Simple Network Management Protocol (SNMP) and Network Time Protocol (NTP) can also be exploited as reflectors in an amplification attack. An example of an amplified DDoS attack through the NTP is through a command called monlist, which sends the details of the last 600 hosts that have requested the time from the NTP server back to the requester. A small request to this time server can be sent using a spoofed source IP address of some victim, which results in a response 556.9 times the size of the request being sent to the victim. This becomes amplified when using botnets that all send requests with the same spoofed IP source, which will result in a massive amount of data being sent back to the victim. It is very difficult to defend against these types of attacks because the response data is coming from legitimate servers. These attack requests are also sent through UDP, which does not require a connection to the server. This means that the source IP is not verified when a request is received by the server. To bring awareness of these vulnerabilities, campaigns have been started that are dedicated to finding amplification vectors which have led to people fixing their resolvers or having the resolvers shut down completely.[citation needed] The Mirai botnet works by using a computer worm to infect hundreds of thousands of IoT devices across the internet. The worm propagates through networks and systems taking control of poorly protected IoT devices such as thermostats, Wi-Fi-enabled clocks, and washing machines. The owner or user will usually have no immediate indication of when the device becomes infected. The IoT device itself is not the direct target of the attack, it is used as a part of a larger attack. Once the hacker has enslaved the desired number of devices, they instruct the devices to try to contact an ISP. In October 2016, a Mirai botnet attacked Dyn which is the ISP for sites such as Twitter, Netflix, etc. As soon as this occurred, these websites were all unreachable for several hours. RUDY attack targets web applications by starvation of available sessions on the web server. Much like Slowloris, RUDY keeps sessions at halt using never-ending POST transmissions and sending an arbitrarily large content-length header value. Manipulating maximum segment size and selective acknowledgement (SACK) may be used by a remote peer to cause a denial of service by an integer overflow in the Linux kernel, potentially causing a kernel panic. Jonathan Looney discovered CVE-2019-11477, CVE-2019-11478, CVE-2019-11479 on June 17, 2019. The shrew attack is a denial-of-service attack on the Transmission Control Protocol where the attacker employs man-in-the-middle techniques. It exploits a weakness in TCP's re-transmission timeout mechanism, using short synchronized bursts of traffic to disrupt TCP connections on the same link. A slow read attack sends legitimate application layer requests, but reads responses very slowly, keeping connections open longer hoping to exhaust the server's connection pool. The slow read is achieved by advertising a very small number for the TCP Receive Window size, and at the same time emptying clients' TCP receive buffer slowly, which causes a very low data flow rate. A sophisticated low-bandwidth DDoS attack is a form of DoS that uses less traffic and increases its effectiveness by aiming at a weak point in the victim's system design, i.e., the attacker sends traffic consisting of complicated requests to the system. Essentially, a sophisticated DDoS attack is lower in cost due to its use of less traffic, is smaller in size making it more difficult to identify, and it has the ability to hurt systems which are protected by flow control mechanisms. A SYN flood occurs when a host sends a flood of TCP/SYN packets, often with a forged sender address. Each of these packets is handled like a connection request, causing the server to spawn a half-open connection, send back a TCP/SYN-ACK packet, and wait for a packet in response from the sender address. However, because the sender's address is forged, the response never comes. These half-open connections exhaust the available connections the server can make, keeping it from responding to legitimate requests until after the attack ends. A teardrop attack involves sending mangled IP fragments with overlapping, oversized payloads to the target machine. This can crash various operating systems because of a bug in their TCP/IP fragmentation re-assembly code. Windows 3.1x, Windows 95 and Windows NT operating systems, as well as versions of Linux prior to versions 2.0.32 and 2.1.63 are vulnerable to this attack.[b] One of the fields in an IP header is the fragment offset field, indicating the starting position, or offset, of the data contained in a fragmented packet relative to the data in the original packet. If the sum of the offset and size of one fragmented packet differs from that of the next fragmented packet, the packets overlap. When this happens, a server vulnerable to teardrop attacks is unable to reassemble the packets resulting in a denial-of-service condition. Voice over IP has made abusive origination of large numbers of telephone voice calls inexpensive and easily automated while permitting call origins to be misrepresented through caller ID spoofing. According to the US Federal Bureau of Investigation, telephony denial-of-service (TDoS) has appeared as part of various fraudulent schemes: TDoS can exist even without Internet telephony. In the 2002 New Hampshire Senate election phone jamming scandal, telemarketers were used to flood political opponents with spurious calls to jam phone banks on election day. Widespread publication of a number can also flood it with enough calls to render it unusable, as happened by accident in 1981 with multiple +1-area code-867-5309 subscribers inundated by hundreds of calls daily in response to the song "867-5309/Jenny". TDoS differs from other telephone harassment (such as prank calls and obscene phone calls) by the number of calls originated. By occupying lines continuously with repeated automated calls, the victim is prevented from making or receiving both routine and emergency telephone calls. Related exploits include SMS flooding attacks and black fax or continuous fax transmission by using a loop of paper at the sender. It takes more router resources to drop a packet with a TTL value of 1 or less than it does to forward a packet with a higher TTL value. When a packet is dropped due to TTL expiry, the router CPU must generate and send an ICMP time exceeded response. Generating many of these responses can overload the router's CPU. A UPnP attack uses an existing vulnerability in Universal Plug and Play (UPnP) protocol to get past network security and flood a target's network and servers. The attack is based on a DNS amplification technique, but the attack mechanism is a UPnP router that forwards requests from one outer source to another. The UPnP router returns the data on an unexpected UDP port from a bogus IP address, making it harder to take simple action to shut down the traffic flood. According to the Imperva researchers, the most effective way to stop this attack is for companies to lock down UPnP routers. In 2014, it was discovered that Simple Service Discovery Protocol (SSDP) was being used in DDoS attacks known as an SSDP reflection attack with amplification. Many devices, including some residential routers, have a vulnerability in the UPnP software that allows an attacker to get replies from UDP port 1900 to a destination address of their choice. With a botnet of thousands of devices, the attackers can generate sufficient packet rates and occupy bandwidth to saturate links, causing the denial of services. Because of this weakness, the network company Cloudflare has described SSDP as the "Stupidly Simple DDoS Protocol". ARP spoofing is a common DoS attack that involves a vulnerability in the ARP protocol that allows an attacker to associate their MAC address to the IP address of another computer or gateway, causing traffic intended for the original authentic IP to be re-routed to that of the attacker, causing a denial of service. Defense techniques Defensive responses to denial-of-service attacks typically involve the use of a combination of attack detection, traffic classification and response tools, aiming to block traffic the tools identify as illegitimate and allow traffic that they identify as legitimate. A list of response tools include the following. All traffic destined to the victim is diverted to pass through a cleaning center or a scrubbing center via various methods such as: changing the victim IP address in the DNS system, tunneling methods (GRE/VRF, MPLS, SDN), proxies, digital cross connects, or even direct circuits. The cleaning center separates bad traffic (DDoS and also other common internet attacks) and only passes good legitimate traffic to the victim server. The victim needs central connectivity to the Internet to use this kind of service unless they happen to be located within the same facility as the cleaning center. DDoS attacks can overwhelm any type of hardware firewall, and passing malicious traffic through large and mature networks becomes more and more effective and economically sustainable against DDoS. Application front-end hardware is intelligent hardware placed on the network before traffic reaches the servers. It can be used on networks in conjunction with routers and switches and as part of bandwidth management. Application front-end hardware analyzes data packets as they enter the network, and identifies and drops dangerous or suspicious flows. Approaches to detection of DDoS attacks against cloud-based applications may be based on an application layer analysis, indicating whether incoming bulk traffic is legitimate. These approaches mainly rely on an identified path of value inside the application and monitor the progress of requests on this path, through markers called key completion indicators. In essence, these techniques are statistical methods of assessing the behavior of incoming requests to detect if something unusual or abnormal is going on. An analogy is to a brick-and-mortar department store where customers spend, on average, a known percentage of their time on different activities such as picking up items and examining them, putting them back, filling a basket, waiting to pay, paying, and leaving. If a mob of customers arrived in the store and spent all their time picking up items and putting them back, but never made any purchases, this could be flagged as unusual behavior. With blackhole routing, all the traffic to the attacked DNS or IP address is sent to a black hole (null interface or a non-existent server). To be more efficient and avoid affecting network connectivity, it can be managed by the ISP. A DNS sinkhole routes traffic to a valid IP address which analyzes traffic and rejects bad packets. Sinkholing may not be efficient for severe attacks. Intrusion prevention systems (IPS) are effective if the attacks have signatures associated with them. However, the trend among attacks is to have legitimate content but bad intent. Intrusion-prevention systems that work on content recognition cannot block behavior-based DoS attacks. An ASIC based IPS may detect and block denial-of-service attacks because they have the processing power and the granularity to analyze the attacks and act like a circuit breaker in an automated way. More focused on the problem than IPS, a DoS defense system (DDS) can block connection-based DoS attacks and those with legitimate content but bad intent. A DDS can also address both protocol attacks (such as teardrop and ping of death) and rate-based attacks (such as ICMP floods and SYN floods). DDS has a purpose-built system that can easily identify and obstruct denial of service attacks at a greater speed than a software-based system. In the case of a simple attack, a firewall can be adjusted to deny all incoming traffic from the attackers, based on protocols, ports, or the originating IP addresses. More complex attacks will however be hard to block with simple rules: for example, if there is an ongoing attack on port 80 (web service), it is not possible to drop all incoming traffic on this port because doing so will prevent the server from receiving and serving legitimate traffic. Additionally, firewalls may be too deep in the network hierarchy, with routers being adversely affected before the traffic gets to the firewall. Also, many security tools still do not support IPv6 or may not be configured properly, so the firewalls may be bypassed during the attacks. Similar to switches, routers have some rate-limiting and ACL capabilities. They, too, are manually set. Most routers can be easily overwhelmed under a DoS attack. Nokia SR-OS using FP4 or FP5 processors offers DDoS protection. Nokia SR-OS also uses big data analytics-based Nokia Deepfield Defender for DDoS protection. Cisco IOS has optional features that can reduce the impact of flooding. Most switches have some rate-limiting and ACL capability. Some switches provide automatic or system-wide rate limiting, traffic shaping, delayed binding (TCP splicing), deep packet inspection and bogon filtering (bogus IP filtering) to detect and remediate DoS attacks through automatic rate filtering and WAN Link failover and balancing. These schemes will work as long as the DoS attacks can be prevented by using them. For example, SYN flood can be prevented using delayed binding or TCP splicing. Similarly, content-based DoS may be prevented using deep packet inspection. Attacks using Martian packets can be prevented using bogon filtering. Automatic rate filtering can work as long as set rate thresholds have been set correctly. WAN-link failover will work as long as both links have a DoS prevention mechanism. Blocking vulnerable ports Threats may be associated with specific TCP or UDP port numbers. Blocking these ports at the firewall can mitigate an attack. For example, in an SSDP reflection attack, the key mitigation is to block incoming UDP traffic on port 1900. Blocking based on TTL Blocking specific Time to live (TTL) values based on the network path length can be a viable option for blocking spoofed attacks. Unintentional denial-of-service An unintentional denial-of-service can occur when a system ends up denied, not due to a deliberate attack by a single individual or group of individuals, but simply due to a sudden enormous spike in popularity. This can happen when an extremely popular website posts a prominent link to a second, less well-prepared site, for example, as part of a news story. The result is that a significant proportion of the primary site's regular users – potentially hundreds of thousands of people – click that link in the space of a few hours, having the same effect on the target website as a DDoS attack. A VIPDoS is the same, but specifically when the link was posted by a celebrity. When Michael Jackson died in 2009, websites such as Google and Twitter slowed down or even crashed. Many sites' servers thought the requests were from a virus or spyware trying to cause a denial-of-service attack, warning users that their queries looked like "automated requests from a computer virus or spyware application". News sites and link sites – sites whose primary function is to provide links to interesting content elsewhere on the Internet – are most likely to cause this phenomenon. The canonical example is the Slashdot effect when receiving traffic from Slashdot. It is also known as "the Reddit hug of death" and "the Digg effect". Similar unintentional denial-of-service can also occur via other media, e.g. when a URL is mentioned on television. In March 2014, after Malaysia Airlines Flight 370 went missing, DigitalGlobe launched a crowdsourcing service on which users could help search for the missing jet in satellite images. The response overwhelmed the company's servers. An unintentional denial-of-service may also result from a prescheduled event created by the website itself, as was the case of the Census in Australia in 2016. Legal action has been taken in at least one such case. In 2006, Universal Tube & Rollform Equipment Corporation sued YouTube: massive numbers of would-be YouTube.com users accidentally typed the tube company's URL, utube.com. As a result, the tube company ended up having to spend large amounts of money on upgrading its bandwidth. Routers have also been known to create unintentional DoS attacks, as both D-Link and Netgear routers have overloaded NTP servers by flooding them without respecting the restrictions of client types or geographical limitations. Side effects of attacks In computer network security, backscatter is a side-effect of a spoofed denial-of-service attack. In this kind of attack, the attacker spoofs the source address in IP packets sent to the victim. In general, the victim machine cannot distinguish between the spoofed packets and legitimate packets, so the victim responds to the spoofed packets as it normally would. These response packets are known as backscatter. If the attacker is spoofing source addresses randomly, the backscatter response packets from the victim will be sent back to random destinations. This effect can be used by network telescopes as indirect evidence of such attacks. The term backscatter analysis refers to observing backscatter packets arriving at a statistically significant portion of the IP address space to determine the characteristics of DoS attacks and victims. Legality Many jurisdictions have laws under which denial-of-service attacks are illegal. UNCTAD highlights that 156 countries, or 80% globally, have enacted cybercrime laws to combat its widespread impact. Adoption rates vary by region, with Europe at a 91% rate, and Africa at 72%. In the US, denial-of-service attacks may be considered a federal crime under the Computer Fraud and Abuse Act with penalties that include years of imprisonment. The Computer Crime and Intellectual Property Section of the US Department of Justice handles cases of DoS and DDoS. In one example, in July 2019, Austin Thompson, aka DerpTrolling, was sentenced to 27 months in prison and $95,000 restitution by a federal court for conducting multiple DDoS attacks on major video gaming companies, disrupting their systems from hours to days. In European countries, committing criminal denial-of-service attacks may, as a minimum, lead to arrest. The United Kingdom is unusual in that it specifically outlawed denial-of-service attacks and set a maximum penalty of 10 years in prison with the Police and Justice Act 2006, which amended Section 3 of the Computer Misuse Act 1990. In January 2019, Europol announced that "actions are currently underway worldwide to track down the users" of Webstresser.org, a former DDoS marketplace that was shut down in April 2018 as part of Operation PowerOFF. Europol said UK police were conducting a number of "live operations" targeting over 250 users of Webstresser and other DDoS services. On January 7, 2013, Anonymous posted a petition on the whitehouse.gov site asking that DDoS be recognized as a legal form of protest similar to the Occupy movement, the claim being that the similarity in the purpose of both is same. See also Notes References Further reading External links |
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Contents Thirty-seventh government of Israel The thirty-seventh government of Israel is the current cabinet of Israel, formed on 29 December 2022, following the Knesset election the previous month. The coalition government currently consists of five parties — Likud, Shas, Otzma Yehudit, Religious Zionist Party and New Hope — and is led by Benjamin Netanyahu, who took office as the prime minister of Israel for the sixth time. The government is widely regarded as the most right-wing government in the country's history, and includes far-right politicians. Several of the government's policy proposals have led to controversies, both within Israel and abroad, with the government's attempts at reforming the judiciary leading to a wave of demonstrations across the country. Following the outbreak of the Gaza war, opposition leader Yair Lapid initiated discussions with Netanyahu on the formation of an emergency government. On 11 October 2023, National Unity MKs Benny Gantz, Gadi Eisenkot, Gideon Sa'ar, Hili Tropper, and Yifat Shasha-Biton joined the Security Cabinet of Israel to form an emergency national unity government. Their accession to the Security Cabinet and to the government (as ministers without portfolio) was approved by the Knesset the following day. Gantz, Netanyahu, and Defense Minister Yoav Gallant became part of the newly formed Israeli war cabinet, with Eisenkot and Ron Dermer serving as observers. National Unity left the government in June 2024. New Hope rejoined the government in September. Otzma Yehudit announced on 19 January 2025 that it had withdrawn from the government, which took effect on 21 January, following the cabinet's acceptance of the three-phase Gaza war ceasefire proposal, though it rejoined two months later. United Torah Judaism left the government in July 2025 over dissatisfaction with the government's draft conscription law. Shas left the government several days later, though it remains part of the coalition. Background The right-wing bloc of parties, led by Benjamin Netanyahu, known in Israel as the national camp, won 64 of the 120 seats in the elections for the Knesset, while the coalition led by the incumbent prime minister Yair Lapid won 51 seats. The new majority has been variously described as the most right-wing government in Israeli history, as well as Israel's most religious government. Shortly after the elections, Lapid conceded to Netanyahu, and congratulated him, wishing him luck "for the sake of the Israeli people". On 15 November, the swearing-in ceremony for the newly elected members of the 25th Knesset was held during the opening session. The vote to appoint a new Speaker of the Knesset, which is usually conducted at the opening session, as well as the swearing in of cabinet members were postponed since ongoing coalition negotiations had not yet resulted in agreement on these positions. Government formation Yair Lapid Yesh Atid Benjamin Netanyahu Likud On 3 November 2022, Netanyahu told his aide Yariv Levin to begin informal coalition talks with allied parties, after 97% of the vote was counted. The leader of the Shas party Aryeh Deri met with Yitzhak Goldknopf, the leader of United Torah Judaism and its Agudat Yisrael faction, on 4 November. The two parties agreed to cooperate as members of the next government. The Degel HaTorah faction of United Torah Judaism stated on 5 November that it will maintain its ideological stance about not seeking any ministerial posts, as per the instruction of its spiritual leader Rabbi Gershon Edelstein, but will seek other senior posts like Knesset committee chairmen and deputy ministers. Netanyahu himself started holding talks on 6 November. He first met with Moshe Gafni, the leader of Degel HaTorah, and then with Goldknopf. Meanwhile, the Religious Zionist Party leader Bezalel Smotrich and the leader of its Otzma Yehudit faction Itamar Ben-Gvir pledged that they would not enter the coalition without the other faction. Gafni later met with Smotrich for coalition talks. Smotrich then met with Netanyahu. On 7 November, Netanyahu met with Ben-Gvir who demanded the Ministry of Public Security with expanded powers for himself and the Ministry of Education or Transport and Road Safety for Yitzhak Wasserlauf. A major demand among all of Netanyahu's allies was that the Knesset be allowed to ignore the rulings of the Supreme Court. Netanyahu met with the Noam faction leader and its sole MK Avi Maoz on 8 November after he threatened to boycott the coalition. He demanded complete control of the Western Wall by the Haredi rabbinate and removal of what he considered as anti-Zionist and anti-Jewish content in schoolbooks. President Isaac Herzog began consultations with heads of all the political parties on 9 November after the election results were certified. During the consultations, he expressed his reservations about Ben-Gvir becoming a member in the next government. Shas met with Likud for coalition talks on 10 November. By 11 November, Netanyahu had secured recommendations from 64 MKs, which constituted a majority. He was given the mandate to form the thirty-seventh government of Israel by President Herzog on 13 November. Otzma Yehudit and Noam officially split from Religious Zionism on 20 November as per a pre-election agreement. On 25 November, Otzma Yehudit and Likud signed a coalition agreement, under which Ben-Gvir will assume the newly created position of National Security Minister, whose powers would be more expansive than that of the Minister of Public Security, including overseeing the Israel Police and the Israel Border Police in the West Bank, as well as giving powers to authorities to shoot thieves stealing from military bases. Yitzhak Wasserlauf was given the Ministry for the Development of the Negev and the Galilee with expanded powers to regulate new West Bank settlements, while separating it from the "Periphery" portfolio, which will be given to Shas. The deal also includes giving the Ministry of Heritage to Amihai Eliyahu, separating it from the "Jerusalem Affairs" portfolio, the chairmanship of the Knesset's Public Security Committee to Zvika Fogel and that of the Special Committee for the Israeli Citizens' Fund to Limor Son Har-Melech, the post of Deputy Economic Minister to Almog Cohen, establishment of a national guard, and expansion of mobilization of reservists in the Border Police. Netanyahu and Maoz signed a coalition agreement on 27 November, under which the latter would become a deputy minister, would head an agency on Jewish identity in the Prime Minister's Office, and would also head Nativ, which processes the aliyah from the former Soviet Union. The agency for Jewish identity would have authority over educational content taught outside the regular curriculum in schools, in addition to the department of the Ministry of Education overseeing external teaching and partnerships, which would bring nonofficial organisations permitted to teach and lecture at schools under its purview. Likud signed a coalition agreement with the Religious Zionist Party on 1 December. Under the deal, Smotrich would serve as the Minister of Finance in rotation with Aryeh Deri, and the party will receive the post of a minister within the Ministry of Defense with control over the departments administering settlement and open lands under the Coordinator of Government Activities in the Territories, in addition to another post of a deputy minister. The deal also includes giving the post of Minister of Aliyah and Integration to Ofir Sofer, the newly created National Missions Ministry to Orit Strook, and the chairmanship of the Knesset's Constitution, Law and Justice Committee to Simcha Rothman. Likud and United Torah Judaism signed a coalition agreement on 6 December, to allow request for an extension to the deadline. Under it, the party would receive the Ministry of Construction and Housing, the chairmanship of the Knesset Finance Committee which will be given to Moshe Gafni, the Ministry of Jerusalem and Tradition (which would replace the Ministry of Jerusalem Affairs and Heritage), in addition to several posts of deputy ministers and chairmanships of Knesset committees. Likud also signed a deal with Shas by 8 December, securing interim coalition agreements with all of their allies. Under the deal, Deri will first serve as the Minister of Interior and Health, before rotating posts with Smotrich after two years. The party will also receive the Ministry of Religious Services and Welfare Ministries, as well as posts of deputy ministers in the Ministry of Education and Interior. The vote to replace then-incumbent Knesset speaker Mickey Levy was scheduled for 13 December, after Likud and its allies secured the necessary number of signatures for it. Yariv Levin of Likud was elected as an interim speaker by 64 votes, while his opponents Merav Ben-Ari of Yesh Atid and Ayman Odeh of Hadash received 45 and five votes respectively. Netanyahu asked Herzog for a 14-day extension after the agreement with Shas to finalise the roles his allied parties would play. Herzog on 9 December extended the deadline to 21 December. On that date, Netanyahu informed Herzog that he had succeeded in forming a coalition, with the new government expected to be sworn in by 2 January 2023. The government was sworn in on 29 December 2022. Timeline Israeli law stated that people convicted of crimes cannot serve in the government. An amendment to that law was made in late 2022, known colloquially as the Deri Law, to allow those who had been convicted without prison time to serve. This allowed Deri to be appointed to the cabinet. Shas leader Aryeh Deri was appointed to be Minister of Health, Minister of the Interior, and Vice Prime Minister in December 2022. He was fired in January 2023, following a Supreme Court decision that his appointment was unreasonable, since he had been convicted of fraud, and had promised not to seek government roles through a plea deal. In March 2023, Defence Minister Yoav Gallant called on the government to delay legislation related to the judicial reform. Prime Minister Netanyahu announced that he had been dismissed from his position, leading to the continuation of mass protests across the country (which had started in January in Tel Aviv). Gallant continued to serve as a minister as he had not received formal notice of dismissal, and two weeks later it was announced that Netanyahu had reversed his decision. Public Safety Minister Itamar Ben-Gvir (Otzma Yehudit leader) and Minister of Justice Yariv Levin (Likud) both threatened to resign if the judicial reform was delayed.[better source needed] After the outbreak of the Gaza war, five members of the National Unity party joined the government as ministers without portfolio, with leader Benny Gantz being made a member of the new Israeli war cabinet (along with Netanyahu and Gallant). As the war progressed, minister of national security Itamar Ben-Gvir threatened to leave the government if the war was ended. A month later in mid December, he again threatened to leave if the war did not maintain "full strength". Gideon Sa'ar stated on 16 March that his New Hope party would resign from the government and join the opposition if Prime Minister Benjamin Netanyahu did not appoint him to the Israeli war cabinet. Netanyahu did not do so, resulting in Sa'ar's New Hope party leaving the government nine days later, reducing the size of the coalition from 76 MKs to 72. Ben-Gvir and Bezalel Smotrich, of the National Religious Party–Religious Zionism party, have indicated that they will withdraw their parties from the government if the January 2025 Gaza war ceasefire is adopted, which would bring down the government. Ben-Gvir announced on 5 June that the members of his party would be allowed to vote as they wish, though his party resumed support on 9 June. On 18 May, Gantz set an 8 June deadline for withdrawal from the coalition, which was delayed by a day following the 2024 Nuseirat rescue operation. Gantz and his party left the government on 9 June, giving the government 64 seats in the Knesset. Sa'ar and his New Hope party rejoined the Netanyahu government on 30 September, increasing the number of seats held by the government to 68. The High Court of Justice ruled on 28 March 2024 that yeshiva funds would no longer be available for students who are "eligible for enlistment", effectively allowing ultra-Orthodox Jews to be drafted into the IDF. Attorney general Gali Baharav-Miara indicated on 31 March that the conscription process must begin on 1 April. The court ruled on 25 June that the IDF must begin to draft yeshiva students. Likud announced on 7 July that it would not put forward any legislation after Shas and United Torah Judaism said that they would boycott the plenary session over the lack of legislation dealing with the Haredi draft. The Ultra-Orthodox boycott continued for a second day, with UTJ briefly ending its boycott on 9 July to unsuccessfully vote in favor of a bill which would have weakened the Law of Return. Yuli Edelstein, who was replaced by Boaz Bismuth on the Foreign Affairs and Defense Committee in early August, published a draft version of the conscription law shortly before his ouster. Bismuth cancelled the work on the draft law in September 2025, which Edelstein called "a shame." Bismuth released the official version of the draft law in late November 2025. It weakened penalties for draft evaders, with Edelstein saying it was "the exact opposite" of the bill which he attempted to pass. Members of Otzma Yehudit resigned from the government on 19 January 2025 over the January 2025 Gaza war ceasefire, which took effect on 21 January. The members rejoined in March, following the "resumption" of the war in Gaza. Avi Maoz of the Noam party left the government in March 2025. On 4 June 2025, senior rabbis for United Torah Judaism Dov Lando and Moshe Hillel Hirsch instructed the party's MKs to pass a bill which would dissolve the Knesset. Yesh Atid, Yisrael Beytenu and The Democrats announced that they will "submit a bill" for dissolution on 11 June, with Yesh Atid tabling the bill on 4 June. There were also reports that Shas would vote in favor of Knesset dissolution amidst division within the governing coalition on Haredi conscription. This jeopardized the coalition's majority and would have triggered new elections if the bill passed. The following day, Agudat Yisrael, one of the United Torah Judaism factions, confirmed that it would submit a bill to dissolve the Knesset. Asher Medina, a Shas spokesman, indicated on 9 June that the party would vote in favor of a preliminary bill to dissolve the Knesset. The rabbis of Degel HaTorah instructed the parties' MKs on 12 June 2025 to oppose the dissolution of the Knesset, which was followed by Yuli Edelstein and the Shas and Degel HaTorah parties announcing that a deal had been reached, with "rabbinical leaders" telling their parties to delay the dissolution vote by a week. Shas and Degel HaTorah voted against the dissolution bill, which led to the bill failing its preliminary reading in a vote of 61 against and 53 in favor. MKs Ya'akov Tessler and Moshe Roth of Agudat Yisrael voted in favor of dissolution. Another dissolution bill will be unable to be brought forward for six months. If the bill had passed its preliminary reading, in addition to three more readings, an election would have been held in approximately three months; The Jerusalem Post posited it would have been held in October. Degel HaTorah announced on 14 July 2025 that it would leave the government because members of the party were dissatisfied after viewing the proposed draft bill by Yuli Edelstein regarding Haredi exemptions from the Israeli draft. Several hours later, Agudat Yisrael announced that it would also leave the government. Deputy Transportation Minister Uri Maklev, Moshe Gafni, the head of the Knesset Finance Committee, Ya'akov Asher, the head of the Knesset Interior and Environment Protection Committee and Jerusalem Affairs minister Meir Porush all submitted their resignations, with their resignations taking effect in 48 hours. Sports Minister Ya'akov Tessler and "Special Committee for Public Petitions Chair" Yitzhak Pindrus also submitted resignations. Yisrael Eichler submitted his resignation as the "head of the Knesset Labor and Welfare Committee" the same day. The resignations will leave Netanyahu's government with a 60-seat majority in the Knesset, as Avi Maoz, of the Noam party, left the government in March 2025. Despite Edelstein's ouster in August, a spokesman for UTJ head Yitzhak Goldknopf remarked that it would not change the faction's withdrawal from the government. The religious council for Shas, called the Moetzet Chachmei HaTorah, instructed the party on 16 July to leave the government, but stay in the coalition. The following day, various cabinet ministers submitted their resignations, including "Interior Minister Moshe Arbel, Social Affairs Minister Ya'akov Margi and Religious Services Minister Michael Malchieli." Malchieli reportedly has postponed his resignation so he could attend a 20 July meeting of the panel investigating whether attorney general Gali Baharav-Miara should be dismissed. Deputy Minister of Agriculture Moshe Abutbul, Minister of Health Uriel Buso and Haim Biton, a minister in the Education Ministry, also submitted their resignation letters, while Arbel retracted his resignation letter. The last cabinet member from the party to submit it was Labor Minister Yoav Ben-Tzur. The ministers who resigned will return to the Knesset, replacing MKs Moshe Roth, Yitzhak Pindrus and Eliyahu Baruchi. Members of government Listed below are the current ministers in the government: Principles and priorities According to the agreements signed between Likud and each of its coalition partners, and the incoming government's published guideline principles, its stated priorities are to combat the cost of living, further centralize Orthodox control over the state religious services, pass judicial reforms which include legislation to reduce judicial controls on executive and legislative power, expand settlements in the West Bank, and consider an annexation of the West Bank. Before the vote of confidence in his new government in the Knesset, Netanyahu presented three top priorities for the new government: internal security and governance, halting the nuclear program of Iran, and the development of infrastructure, with a focus on further connecting the center of the country with its periphery. Policies The government's flagship program, centered around reforms in the judicial branch, drew widespread criticism. Critics said it would have negative effects on the separation of powers, the office of the Attorney General, the economy, public health, women and minorities, workers' rights, scientific research, the overall strength of Israel's democracy and its foreign relations. After weeks of public protests on Israel's streets, joined by a growing number of military reservists, Minister of Defense Yoav Gallant spoke against the reform on 25 March, calling for a halt of the legislative process "for the sake of Israel's security". The next day, Netanyahu announced that he would be removed from his post, sparking another wave of protest across Israel and ultimately leading to Netanyahu agreeing to pause the legislation. On 10 April, Netanyahu announced that Gallant would keep his post. On 27 March 2023, after the public protests and general strikes, Netanyahu announced a pause in the reform process to allow for dialogue with opposition parties. However, negotiations aimed at reaching a compromise collapsed in June, and the government resumed its plans to unilaterally pass parts of the legislation. On 24 July 2023, the Knesset passed a bill that curbs the power of the Supreme Court to declare government decisions unreasonable; on 1 January 2024, the Supreme Court struck the bill down. The Knesset passed a "watered-down" version of the judicial reform package in late March 2025 which "changes the composition" of the judicial selection committee. In December 2022 Minister of National Security Itamar Ben-Gvir sought to amend the law that regulates the operations of the Israel Police, such that the ministry will have more direct control of its forces and policies, including its investigative priorities. Attorney General Gali Baharav-Miara objected to the draft proposal, raising concerns that the law would enable the politicization of police work, and the draft was amended to partially address those concerns. Nevertheless, in March 2023 Deputy Attorney General Gil Limon stated that the Attorney General's fears had been realized, referring to several instances of ministerial involvement in the day-to-day work of the otherwise independent police force – statements that were repeated by the Attorney General herself two days later. Separately, Police Commissioner Kobi Shabtai instructed Deputy Commissioners to avoid direct communication with the minister, later stating that "the Israel Police will remain apolitical, and act only according to law". Following appeals by the Association for Civil Rights in Israel and the Movement for Quality Government in Israel, the High Court of Justice instructed Ben-Gvir "to refrain from giving operational directions to the police... [especially] as regards to protests and demonstrations against the government." As talks of halting the judicial reform gained wind during March 2023, Minister of National Security Itamar Ben-Gvir threatened to resign if the legislation implementing the changes was suspended. To appease Ben-Gvir, Prime Minister Netanyahu announced that the government would promote the creation of a new National Guard, to be headed by Ben-Gvir. On 29 March, thousands of Israelis demonstrated in Tel Aviv, Haifa and Jerusalem against this decision. On 1 April, the New York Times quoted Gadeer Nicola, head of the Arab department at the Association for Civil Rights in Israel, as saying "If this thing passes, it will be an imminent danger to the rights of Arab citizens in this country. This will create two separate systems of applying the law. The regular police which will operate against Jewish citizens — and a militarized militia to deal only with Arab citizens." The same day, while speaking on Israel's Channel 13 about those whom he'd like to see enlist in the National Guard, Ben-Gvir specifically mentioned La Familia, the far-right fan club of the Beitar Jerusalem soccer team. On 2 April, Israel's cabinet approved the establishment of a law enforcement body that would operate independently of the police, under Ben-Gvir's authority. According to the decision, the Minister was to establish a committee chaired by the Director General of the Ministry of National Security, with representatives of the ministries of defense, justice and finance, as well as the police and the IDF, to outline the operations of the new organization. The committee's recommendations will be submitted to the government for consideration. Addressing a conference on 4 April, Police Commissioner Kobi Shabtai said that he is not opposed to the establishment of a security body which would answer to the police, but "a separate body? Absolutely not." The police chief said he had warned Ben-Gvir that the establishment of a security body separate from the police is "unnecessary, with extremely high costs that may harm citizens' personal security." During a press conference on 10 April, Prime Minister Netanyahu said, in what has been seen by some news outlets as a concession to the protesters, that "This will not be anyone's militia, it will be a security body, orderly, professional, that will be subordinate to one of the [existing] security bodies." The committee established by the government recommended the government to order the establishment of the National Guard immediately while allocating budgets. The National Guard, under whose command will be a superintendent of the police, will not be subordinate to Ben-Gvir. It will be subordinate to the police commissioner and will be part of Israel Border Police. The Ministry of Defense and Finance opposed the conclusions. The Israeli National Security Council called for further discussion on this. The coalition's efforts to expand the purview of Rabbinical courts; force some organizations, such as hospitals, to enforce certain religious practices; amend the Law Prohibiting Discrimination to allow gender segregation and discrimination on the grounds of religious belief; expand funding for religious causes; and put into law the exemption of yeshiva and kolel students from conscription have drawn criticism. According to the Haaretz op-ed of 7 March 2023, "the current coalition is interested... in modifying the public space so it suits the religious lifestyle. The legal coup is meant to castrate anyone who can prevent it, most of all the HCJ." Several banks and institutional investors, including the Israel Discount Bank and AIG have committed to avoid investing in, or providing credit to any organization that will discriminate against others on ground of religion, race, gender or sexual orientation. A series of technology companies and investment firms including Wiz, Intel Israel, Salesforce and Microsoft Israel Research and Development, have criticized the proposed changes to the Law Prohibiting Discrimination, with Wiz stating that it will require its suppliers to commit to preventing discrimination. Over sixty prominent law firms pledged that they will neither represent, nor do business with discriminating individuals and organizations. Insight Partners, a major private equity fund operating in Israel, released a statement warning against intolerance and any attempt to harm personal liberties. Orit Lahav, chief executive of the women's rights organization Mavoi Satum ("Dead End"), said that "the Rabbinical courts are the most discriminatory institution in the State of Israel... Limiting the HCJ[d] while expanding the jurisdiction of the Rabbinical courts would... cause significant harm to women." Anat Thon Ashkenazy, Director of the Center for Democratic Values and Institutions at the Israel Democracy Institute, said that "almost every part of the reform could harm women... the meaning of an override clause is that even if the court says that the law on gender segregation is illegitimate, is harmful, the Knesset could say 'Okay, we say otherwise'". She added that "there is a very broad institutional framework here, after which there will come legislation that harms women's right and we will have no way of protecting or stopping it." During July 2023, 20 professional medical associations signed a letter of position warning against the ramifications to public health that would result from the exclusion of women from the public sphere. They cited, among others, a rise in prevalence of risk factors for cardiovascular disease, pregnancy-related ailments, psychological distress, and the risk of suicide. On 30 July the Knesset passed an amendment to penal law adding sexual offenses to those offenses whose penalty can be doubled if done on grounds of "nationalistic terrorism, racism or hostility towards a certain community". According to MK Limor Son Har-Melech, the bill is meant to penalize any individual who "[intends to] harm a woman sexually based on her Jewishness". The law was criticized by MK Gilad Kariv as "populist, nationalistic, and dangerous towards the Arab citizens of Israel", and by MK Ahmad Tibi as a "race law", and was objected to by legal advisors at the Ministry of Justice and the Knesset Committee on National Security. Activist Orit Kamir wrote that "the amendment... is neither feminist, equal, nor progressive, but the opposite: it subordinates women's sexuality to the nationalistic, racist patriarchy. It hijacks the Law for Prevention of Sexual Harassment to serve a world view that tags women as sexual objects that personify the nation's honor." Yael Sherer, director of the Lobby to Combat Sexual Violence, criticized the law as being informed by dated ideas about sexual assault, and proposed that MKs "dedicate a session... to give victims of sexual assault an opportunity to come out of the darkness... instead of [submitting] declarative bills that change nothing and are not meant but for grabbing headlines". In Israel, during 2022, 24 women "were murdered because they were women," which was an increase of 50% compared to 2021. A law permitting courts to order men subject to a restraining order following domestic violence offenses to wear electronic tags was drafted during the previous Knesset and had passed its first reading unanimously. On 22 March 2023, the Knesset voted to reject the bill. It had been urged to do so by National Security Minister Itamar Ben-Gvir, who said that the bill was unfair to men. Earlier in the week, Ben-Gvir had blocked the measure from advancing in the ministerial legislative committee. The MKs voting against the bill included Prime Minister Netanyahu. The Association of Families of Murder Victims said that by rejecting the law, National Security Minister Itamar Ben-Gvir "brings joy to violent men and abandons the women threatened with murder… unsupervised restraining orders endanger women's lives even more. They give women the illusion of being protected, and then they are murdered." MK Pnina Tamano-Shata, chairwoman of the Knesset Committee on the Status of Women and Gender Equality, said that "the coalition proved today that it despises women's lives." The NGO Amutat Bat Melech [he], which assists Orthodox and ultra-Orthodox women who suffer from domestic violence, said that: "Rejecting the electronic bracelet bill is disconnected from the terrible reality of seven femicides since the beginning of the year. This is an effective tool of the first degree that could have saved lives and reduced the threat to women suffering from domestic violence. This is a matter of life and death, whose whole purpose is to provide a solution to defend women." The agreement signed by the coalition parties includes the setting up of a committee to draft changes to the Law of Return. Israeli religious parties have long demanded that the "grandchild clause" of the Law of Return be cancelled. This clause grants citizenship to anyone with at least one Jewish grandparent, as long as they do not practice another religion. If the grandchild clause were to be removed from the Law of Return then around 3 million people who are currently eligible for aliyah would no longer be eligible. The heads of the Jewish Agency, the Jewish Federations of North America, the World Zionist Organization and Keren Hayesod sent a joint letter to Prime Minister Netanyahu, expressing their "deep concern" about any changes to the Law of Return, adding that "Any change in the delicate and sensitive status quo on issues such as the Law of Return or conversion could threaten to unravel the ties between us and keep us away from each other." The Executive Council of Australian Jewry and the Zionist Federation of Australia issued a joint statement saying "We… view with deep concern… proposals in relation to religious pluralism and the law of return that risk damaging Israel's… relationship with Diaspora Jewry." On 19 March 2023, Israeli Finance Minister Bezalel Smotrich spoke in Paris at a memorial service for a Likud activist. The lectern at which Smotrich spoke was covered with a flag depicting the 'Greater Land of Israel,' encompassing the whole of Mandatory Palestine, as well as Trans-Jordan. During his speech, Smotrich said that "there's no such thing as Palestinians because there's no such thing as a Palestinian people." He added that the Palestinian people are a fictitious nation invented only to fight the Zionist movement, asking "Is there a Palestinian history or culture? There isn't any." The event received widespread media coverage. On 21 March, a spokesman for the US State Department sharply criticized Smotrich's comments. "The comments, which were delivered at a podium adorned with an inaccurate and provocative map, are offensive, they are deeply concerning, and, candidly, they're dangerous. The Palestinians have a rich history and culture, and the United States greatly values our partnership with the Palestinian people," he said. The Jordanian Foreign Ministry also voiced disapproval: "The Israeli Minister of Finance's use, during his participation in an event held yesterday in Paris, of a map of Israel that includes the borders of the Hashemite Kingdom of Jordan and the occupied Palestinian territories represents a reckless inflammatory act, and a violation of international norms and the Jordanian-Israeli peace treaty." Additionally, a map encompassing Mandatory Palestine and Trans-Jordan with a Jordanian flag on it was placed on a central lectern in the Jordanian Parliament. Jordan's parliament voted to expel the Israeli ambassador. Israel's Ministry of Foreign Affairs released a clarification relating to the matter, stating that "Israel is committed to the 1994 peace agreement with Jordan. There has been no change in the position of the State of Israel, which recognizes the territorial integrity of the Hashemite Kingdom of Jordan". Ahead of a Europe Day event due to take place on 9 May 2023, far-right wing National Security Minister Itamar Ben-Gvir was assigned as a representative of the government and a speaker at the event by the government secretariat, which deals with placing ministers at receptions on the occasion of the national days of the foreign embassies. The European Union requested that Ben-Gvir not attend, but the government did not make changes to the plan. On 8 May, the European delegation to Israel cancelled the reception, stating that: "The EU Delegation to Israel is looking forward to celebrating Europe Day on May 9, as it does every year. Regrettably, this year we have decided to cancel the diplomatic reception, as we do not want to offer a platform to someone whose views contradict the values the European Union stands for. However, the Europe Day cultural event for the Israeli public will be maintained to celebrate with our friends and partners in Israel the strong and constructive bilateral relationship". Israel's Opposition Leader Yair Lapid stated: "Sending Itamar Ben-Gvir to a gathering of EU ambassadors is a serious professional mistake. The government is embarrassing a large group of friendly countries, jeopardizing future votes in international institutions, and damaging our foreign relations. Last year, after a decade of efforts, we succeeded in signing an economic-political agreement with the European Union that will contribute to the Israeli economy and our foreign relations. Why risk it, and for what? Ben-Gvir is not a legitimate person in the international community (and not really in Israel either), and sometimes you have to be both wise and just and simply send someone else". On 23 February 2023, Defense Minister Gallant signed an agreement assigning governmental powers in the West Bank to a body to be headed by Minister Bezalel Smotrich, who will effectively become the governor of the West Bank, controlling almost all areas of life in the area, including planning, building and infrastructure. Israeli governments have hitherto been careful to keep the occupation as a military government. The temporary holding of power by an occupying military force, pending a negotiated settlement, is a principle of international law – an expression of the prohibition against obtaining sovereignty through conquest that was introduced in the wake of World War II. An editorial in Haaretz noted that the assignment of governmental powers in the West Bank to a civilian governor, alongside the plan to expand the dual justice system so that Israeli law will apply fully to settlers in the West Bank, constitutes de jure annexation of the West Bank. On 26 February 2023, following the 2023 Huwara shooting in which two Israelis were killed by an unidentified attacker, hundreds of Israeli settlers attacked the Palestinian town of Huwara and three nearby villages, setting alight hundreds of Palestinian homes (some with people in them), businesses, a school, and numerous vehicles, killing one Palestinian man and injuring 100 others. Bezalel Smotrich subsequently called on Twitter for Huwara to be "wiped out" by the Israeli government. Zvika Fogel MK, of the ultra-nationalist Otzma Yehudit, which forms part of the governing coalition, said that he "looks very favorably upon" the results of the rampage. Members of the coalition proposed an amendment to the Disengagement Law, which would allow Israelis to resettle settlements vacated during the 2005 Israeli disengagement from Gaza and the northern West Bank. The evacuated settlements were considered illegal under international law, according to most countries. The proposal was approved for voting by the Foreign Affairs and Defense Committee on 9 March 2023, while the committee was still waiting for briefing materials from the NSS, IDF, MFA and Shin Bet, and was passed on 21 March. The US has requested clarification from Israeli ambassador Michael Herzog. A US State Department spokesman stated that "The U.S. strongly urges Israel to refrain from allowing the return of settlers to the area covered by the legislation, consistent with both former Prime Minister Sharon and the current Israeli Government's commitment to the United States," noting that the actions represent a clear violation of undertakings given by the Sharon government to the Bush administration in 2005 and Netanyahu's far-right coalition to the Biden administration the previous week. Minister of Communication Shlomo Karhi had initially intended to cut the funding of the Israeli Public Broadcasting Corporation (also known by its blanket branding Kan) by 400 million shekels – roughly half of its total budget – closing several departments, and privatizing content creation. In response, the Director-General of the European Broadcasting Union, Noel Curran, sent two urgent letters to Netanyahu, expressing his concerns and calling on the Israeli government to "safeguard the independence of our Member KAN and ensure it is allowed to operate in a sustainable way, with funding that is both stable, adequate, fair, and transparent." On 25 January 2023, nine journalist organizations representing some of Kan's competitors issued a statement of concern, acknowledging the "important contribution of public broadcasting in creating a worthy, unbiased and non-prejudicial journalistic platform", and noting that "the existence of the [broadcasting] corporation as a substantial public broadcast organization strengthens media as a whole, adding to the competition in the market rather than weakening it." They also expressed their concern that the "real reason" for the proposal was actually "an attempt to silence voices from which... [the Minister] doesn't always draw satisfaction". The same day, hundreds of journalists, actors and filmmakers protested in Tel Aviv. The proposal was eventually put on hold. On 22 February 2023 it was reported that Prime Minister Netanyahu was attempting to appoint his close associate Yossi Shelley as the deputy to the National Statistician — a highly sensitive position in charge of providing accurate data for decision makers. The appointment of Shelley, who did not possess the required qualifications for the role, was withdrawn following publication. In its daily editorial, Haaretz tied this attempt with the judicial reform: "once they take control of the judiciary, law enforcement and public media, they wish to control the state's data base, the dry numerical data it uses to plan its future". Netanyahu also proposed Avi Simhon for the role, and eventually froze all appointments at the Israel Central Bureau of Statistics. Also on 22 February 2023, it was revealed that Yoav Kish, the Minister of Education, was promoting a draft government decision change to the National Library of Israel board of directors which would grant him more power over the institution. In response, the Hebrew University — which owned the library until 2008 – announced that if the draft is accepted, it will withdraw its collections from the library. The university's collections, which according to the university constitute some 80% of the library's collection, include the Agnon archive, the original manuscript of Hatikvah, and the Rothschild Haggadah, the oldest known Haggadah. A group of 300 authors and poets signed an open letter against the move, further noting their objection against "political takeover" of public broadcasting, as well as "any legislation that will castrate the judiciary and damage the democratic foundations of the state of Israel". Several days later, it was reported that a series of donors decided to withhold their donations to the library, totaling some 80 million shekels. On 3 March a petition against the move by 1,500 academics, including Israel Prize laureates, was sent to Kish. The proposal has been seen by some as retribution against Shai Nitzan, the former State Attorney and the library's current rector. On 5 March it was reported that the Legal Advisor to the Ministry of Finance, Asi Messing, was withholding the proposal. According to Messing, the proposal – which was being promoted as part of the Economic Arrangements Law – "was not reviewed... by the qualified personnel in the Ministry of Finance, does not align with any of the common goals of the economic plan, was not agreed to by myself and was not approved by the Attorney General." As of February 2023, the government has been debating several proposals that will significantly weaken the Ministry of Environmental Protection, including reducing the environmental regulation of planning and development and electricity production. One of the main proposals, the transferal of a 3 billion shekel fund meant to finance waste management plants from the Ministry of Environmental Protection to the Ministry of the Interior, was eventually withdrawn. The Minister of Environmental Protection, Idit Silman, has been criticized for using for meeting with climate change denialists, for wasteful and personally-motivated travel on the ministry's expense, for politicizing the role, and for engaging in political activity on the ministry's time. The government has been noted for an unusually high number of dismissals and resignations of senior career civil servants, and for the frequent attempts to replace them with candidates with known political associations, who are often less competent. According to sources, Netanyahu and people in his vicinity are seeking out civil servants who were appointed by the previous government, intent on replacing them with people loyal to him. Governmental nominees for various positions have been criticized for lack of expertise. In addition to the nominee to the position of Deputy National Statistician (see above), the Director General of the Ministry of Finance, Shlomi Heisler; the Director General of the Ministry of Justice, Itamar Donenfeld; and the Director General of Ministry of Transport, Moshe Ben Zaken, have all been criticized for incompetence, lack of familiarity with their Ministries' subject matter, lack of interest in the job, or lack of experience in managing large organizations. It has been reported that in some ministries, senior officials were enacting slowdowns as a means for dealing with the new ministers and director generals. On 28 July the director general of the Ministry of Education resigned, citing as reason the societal "rift". Asaf Zalel, a retired Air Force Brigadier General, was appointed in January. When asked about attempts to appoint his personal friend and attorney to the board of directors of a state-owned company, Minister David Amsalem replied: "that is my job, due to my authority to appoint directors. I put forward people that I know and hold in esteem". Under Minister of Transport Miri Regev, the ministry has either dismissed or lost the heads of the National Public Transport Authority, Israel Airports Authority, National Road Safety Authority, Israel Railways, and several officials in Netivei Israel. The current chair of Netivei Israel is Likud member and Regev associate Yigal Amadi, and the legal counsel is Einav Abuhzira, daughter of a former Likud branch chair. Abuhzira was appointed instead of Elad Berdugo, nephew of Netanyahu surrogate Yaakov Bardugo, after he was disqualified for the role by the Israel Government Companies Authority. In July 2023 the Ministry of Communications, Shlomo Karhi, and the minister in charge of the Israel Government Companies Authority, Dudi Amsalem, deposed the chair of the Israel Postal Company, Michael Vaknin. The chair, who was hired to lead the company's financial recovery after years of operational loss and towards privatization, has gained the support of officials at the Authority and at the Ministry of Finance; nevertheless, the ministers claimed that his performance is inadequate, and nominated in his place Yiftah Ron-Tal, who has known ties to Netanyahu and Smotrich. They also nominated four new directors, two of which have known political associations, and a third who was a witness in Netanyahu's trial. The coalition is allowed to spend a portion of the state's budget on a discretionary basis, meant to coax member parties to reach an agreement on the budget. As of May 2023, the government was pushing an allocation of over 13 billion shekels over two years - almost seven times the amount allocated by the previous government. Most of the funds will be allocated for uses associated with the religious, orthodox and settler communities. The head of the Budget Department at the Ministry of Finance, Yoav Gardos, objected to the allocations, claiming they would exacerbate unemployment in the Orthodox community, which is projected to cost the economy a total of 6.7 trillion shekels in lost produce by 2065. At the onset of the Gaza war and the declaration of a state of national emergency, Minister of Finance Bezalel Smotrich instructed government agencies to continue with the planned distribution of discretionary funds. Corruption During March 2023, the government was promoting an amendment to the Law on Public Service (Gifts) that would allow Netanyahu to receive donations to fund his legal defense. The amendment follows a decision by the High Court of Justice (HCJ) that forced Netanyahu to refund US$270,000 given to him and his wife by his late cousin, Nathan Mileikowsky, for their legal defense. This is in contrast to past statements by Minister of Justice Yariv Levin, who spoke against the possible conflict of interests that can result from such transactions. The bill was opposed by the Attorney General Gali Baharav-Miara, who stressed that it could "create a real opportunity for governmental corruption", and was eventually withdrawn at the end of March. As of March 2023, the coalition was promoting a bill that would prevent judicial review of ministerial appointments. The bill is intended to prevent the HCJ from reviewing the appointment of the twice-convicted chairman of Shas, Aryeh Deri (convicted of bribery, fraud, and breach of trust), to a ministerial position, after his previous appointment was annulled on grounds of unreasonableness. The bill follows on the heels of another amendment, that relaxed the ban on the appointment of convicted criminals, so that Deri - who was handed a suspended sentence after his second conviction - could be appointed. The bill is opposed by the Attorney General, as well as by the Knesset Legal Adviser, Sagit Afik. Israeli law allows for declaring a Prime Minister (as well as several other high-ranking public officials) to be temporarily or permanently incapacitated, but does not specify the conditions which can lead to a declaration of incapacitation. In the case of the Prime Minister, the authority to do so is given to the Attorney General. In March 2023, the coalition advanced a bill that passes this authority from the Attorney General to the government with the approval of the Knesset committee, and clarified that incapacitation can only result from medical or mental conditions. On 3 January 2024, the Supreme Court ruled by a majority of 6 out of 11 that the validity of the law will be postponed to the next Knesset because the bill in its immediate application is a personal law and is intended to serve a distinct personal purpose. Later, the court rejected a petition regarding the definition of Netanyahu as an incapacitated prime minister due to his ongoing trial and conflict of interests. Notes References External links |
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Contents Middle East The Middle East[b] is a geopolitical region encompassing the Arabian Peninsula, Egypt, Iran, Iraq, the Levant, and Turkey. The term came into widespread usage by Western European nations in the early 20th century as a replacement of the term Near East (both were in contrast to the Far East). The term "Middle East" has led to some confusion over its changing definitions. Since the late 20th century, it has been criticized as being too Eurocentric. The region includes the vast majority of the territories included in the closely associated definition of West Asia, but without the South Caucasus. It also includes all of Egypt (not just the Sinai region) and all of Turkey (including East Thrace). Most Middle Eastern countries (13 out of 18) are part of the Arab world. The three most populous countries in the region are Egypt, Iran, and Turkey, while Saudi Arabia is the largest Middle Eastern country by area. The history of the Middle East dates back to ancient times, and it was long considered the "cradle of civilization". The geopolitical importance of the region has been recognized and competed for during millennia. The Abrahamic religions (Judaism, Christianity, and Islam) have their origins in the Middle East. Arabs constitute the main ethnic group in the region, followed by Turks, Persians, Kurds, Jews, and Assyrians. The Middle East generally has a hot, arid climate, especially in the Arabian and Egyptian regions. Several major rivers provide irrigation to support agriculture in limited areas here, such as the Nile Delta in Egypt, the Tigris and Euphrates watersheds of Mesopotamia, and the basin of the Jordan River that spans most of the Levant. These regions are collectively known as the Fertile Crescent, and comprise the core of what historians had long referred to as the cradle of civilization; multiple regions of the world have since been classified as also having developed independent, original civilizations. Conversely, the Levantine coast and most of Turkey have relatively temperate climates typical of the Mediterranean, with dry summers and cool, wet winters. Most of the countries that border the Persian Gulf have vast reserves of petroleum. Monarchs of the Arabian Peninsula in particular have benefitted economically from petroleum exports. Because of the arid climate and dependence on the fossil fuel industry, the Middle East is both a major contributor to climate change and a region that is expected to be severely adversely affected by it. Other concepts of the region exist, including the broader Middle East and North Africa (MENA), which includes states of the Maghreb and the Sudan. The term the "Greater Middle East" also includes Afghanistan, Mauritania, Pakistan, as well as parts of East Africa, and sometimes Central Asia and the South Caucasus. Terminology The term "Middle East" may have originated in the 1850s in the British India Office. However, it became more widely known when United States naval strategist Alfred Thayer Mahan used the term in 1902 to "designate the area between Arabia and India". During this time the British and Russian empires were vying for influence in Central Asia, a rivalry that would become known as the Great Game. Mahan realized not only the strategic importance of the region, but also of its center, the Persian Gulf. He labeled the area surrounding the Persian Gulf as the Middle East. He said that, beyond Egypt's Suez Canal, the Gulf was the most important passage for Britain to control in order to keep the Russians from advancing towards British India. Mahan first used the term in his article "The Persian Gulf and International Relations", published in September 1902 in the National Review, a British journal. The Middle East, if I may adopt a term which I have not seen, will some day need its Malta, as well as its Gibraltar; it does not follow that either will be in the Persian Gulf. Naval force has the quality of mobility which carries with it the privilege of temporary absences; but it needs to find on every scene of operation established bases of refit, of supply, and in case of disaster, of security. The British Navy should have the facility to concentrate in force if occasion arise, about Aden, India, and the Persian Gulf. Mahan's article was reprinted in The Times and followed in October by a 20-article series entitled "The Middle Eastern Question", written by Sir Ignatius Valentine Chirol. During this series, Sir Ignatius expanded the definition of Middle East to include "those regions of Asia which extend to the borders of India or command the approaches to India." After the series ended in 1903, The Times removed quotation marks from subsequent uses of the term. Until World War II, it was customary to refer to areas centered on Turkey and the eastern shore of the Mediterranean as the "Near East", while the "Far East" centered on China, India and Japan. The Middle East was then defined as the area from Mesopotamia to Burma; namely, the area between the Near East and the Far East. This area broadly corresponds to South Asia. In the late 1930s, the British established the Middle East Command, which was based in Cairo, for its military forces in the region. After that time, the term "Middle East" gained broader usage in Europe and the United States. Following World War II, for example, the Middle East Institute was founded in Washington, D.C. in 1946. The corresponding adjective is Middle Eastern and the derived noun is Middle Easterner. While non-Eurocentric terms such as "Southwest Asia" or "Swasia" have been sparsely used, the classification of the African country, Egypt, among those counted in the Middle East challenges the usefulness of using such terms. The description Middle has also led to some confusion over changing definitions. Before the First World War, "Near East" was used in English to refer to the Balkans and the Ottoman Empire, while "Middle East" referred to the Caucasus, Persia, and Arabian lands, and sometimes Afghanistan, India and others. In contrast, "Far East" referred to the countries of East Asia (e.g. China, Japan, and Korea). With the collapse of the Ottoman Empire in 1918, "Near East" largely fell out of common use in English, while "Middle East" came to be applied to the emerging independent countries of the Islamic world. However, the usage "Near East" was retained by a variety of academic disciplines, including archaeology and ancient history. In their usage, the term describes an area identical to the term Middle East, which is not used by these disciplines (see ancient Near East).[citation needed] The first official use of the term "Middle East" by the United States government was in the 1957 Eisenhower Doctrine, which pertained to the Suez Crisis. Secretary of State John Foster Dulles defined the Middle East as "the area lying between and including Libya on the west and Pakistan on the east, Syria and Iraq on the North and the Arabian peninsula to the south, plus the Sudan and Ethiopia." In 1958, the State Department explained that the terms "Near East" and "Middle East" were interchangeable, and defined the region as including only Egypt, Syria, Israel, Lebanon, Jordan, Iraq, Saudi Arabia, Kuwait, Bahrain, and Qatar. Since the late 20th century, scholars and journalists from the region, such as journalist Louay Khraish and historian Hassan Hanafi have criticized the use of "Middle East" as a Eurocentric and colonialist term. The Associated Press Stylebook of 2004 says that Near East formerly referred to the farther west countries while Middle East referred to the eastern ones, but that now they are synonymous. It instructs: Use Middle East unless Near East is used by a source in a story. Mideast is also acceptable, but Middle East is preferred. European languages have adopted terms similar to Near East and Middle East. Since these are based on a relative description, the meanings depend on the country and are generally different from the English terms. In German the term Naher Osten (Near East) is still in common use (nowadays the term Mittlerer Osten is more and more common in press texts translated from English sources, albeit having a distinct meaning). In the four Slavic languages, Russian Ближний Восток or Blizhniy Vostok, Bulgarian Близкия Изток, Polish Bliski Wschód or Croatian Bliski istok (terms meaning Near East are the only appropriate ones for the region). However, some European languages do have "Middle East" equivalents, such as French Moyen-Orient, Swedish Mellanöstern, Spanish Oriente Medio or Medio Oriente, Greek is Μέση Ανατολή (Mesi Anatoli), and Italian Medio Oriente.[c] Perhaps because of the political influence of the United States and Europe, and the prominence of Western press, the Arabic equivalent of Middle East (Arabic: الشرق الأوسط ash-Sharq al-Awsaṭ) has become standard usage in the mainstream Arabic press. It comprises the same meaning as the term "Middle East" in North American and Western European usage. The designation, Mashriq, also from the Arabic root for East, also denotes a variously defined region around the Levant, the eastern part of the Arabic-speaking world (as opposed to the Maghreb, the western part). Even though the term originated in the West, countries of the Middle East that use languages other than Arabic also use that term in translation. For instance, the Persian equivalent for Middle East is خاورمیانه (Khāvar-e miyāneh), the Hebrew is המזרח התיכון (hamizrach hatikhon), and the Turkish is Orta Doğu. Countries and territory Traditionally included within the Middle East are Arabia, Asia Minor, East Thrace, Egypt, Iran, the Levant, Mesopotamia, and the Socotra Archipelago. The region includes 17 UN-recognized countries and one British Overseas Territory. Various concepts are often paralleled to the Middle East, most notably the Near East, Fertile Crescent, and Levant. These are geographical concepts, which refer to large sections of the modern-day Middle East, with the Near East being the closest to the Middle East in its geographical meaning. Due to it primarily being Arabic speaking, the Maghreb region of North Africa is sometimes included. "Greater Middle East" is a political term coined by the second Bush administration in the first decade of the 21st century to denote various countries, pertaining to the Muslim world, specifically Afghanistan, Iran, Pakistan, and Turkey. Various Central Asian countries are sometimes also included. History The Middle East lies at the juncture of Africa and Eurasia and of the Indian Ocean and the Mediterranean Sea (see also: Indo-Mediterranean). It is the birthplace and spiritual center of religions such as Christianity, Islam, Judaism, Manichaeism, Yezidi, Druze, Yarsan, and Mandeanism, and in Iran, Mithraism, Zoroastrianism, Manicheanism, and the Baháʼí Faith. Throughout its history the Middle East has been a major center of world affairs; a strategically, economically, politically, culturally, and religiously sensitive area. The region is one of the regions where agriculture was independently discovered, and from the Middle East it was spread, during the Neolithic, to different regions of the world such as Europe, the Indus Valley and Eastern Africa. Prior to the formation of civilizations, advanced cultures formed all over the Middle East during the Stone Age. The search for agricultural lands by agriculturalists, and pastoral lands by herdsmen meant different migrations took place within the region and shaped its ethnic and demographic makeup. The Middle East is widely and most famously known as the cradle of civilization. The world's earliest civilizations, Mesopotamia (Sumer, Akkad, Assyria and Babylonia), ancient Egypt and Kish in the Levant, all originated in the Fertile Crescent and Nile Valley regions of the ancient Near East. These were followed by the Hittite, Greek, Hurrian and Urartian civilisations of Asia Minor; Elam, Persia and Median civilizations in Iran, as well as the civilizations of the Levant (such as Ebla, Mari, Nagar, Ugarit, Canaan, Aramea, Mitanni, Phoenicia and Israel) and the Arabian Peninsula (Magan, Sheba, Ubar). The Near East was first largely unified under the Neo Assyrian Empire, then the Achaemenid Empire followed later by the Macedonian Empire and after this to some degree by the Iranian empires (namely the Parthian and Sassanid Empires), the Roman Empire and Byzantine Empire. The region served as the intellectual and economic center of the Roman Empire and played an exceptionally important role due to its periphery on the Sassanid Empire. Thus, the Romans stationed up to five or six of their legions in the region for the sole purpose of defending it from Sassanid and Bedouin raids and invasions. From the 4th century CE onwards, the Middle East became the center of the two main powers at the time, the Byzantine Empire and the Sassanid Empire. However, it would be the later Islamic Caliphates of the Middle Ages, or Islamic Golden Age which began with the Islamic conquest of the region in the 7th century AD, that would first unify the entire Middle East as a distinct region and create the dominant Islamic Arab ethnic identity that largely (but not exclusively) persists today. The 4 caliphates that dominated the Middle East for more than 600 years were the Rashidun Caliphate, the Umayyad caliphate, the Abbasid caliphate and the Fatimid caliphate. Additionally, the Mongols would come to dominate the region, the Kingdom of Armenia would incorporate parts of the region to their domain, the Seljuks would rule the region and spread Turko-Persian culture, and the Franks would found the Crusader states that would stand for roughly two centuries. Josiah Russell estimates the population of what he calls "Islamic territory" as roughly 12.5 million in 1000 – Anatolia 8 million, Syria 2 million, and Egypt 1.5 million. From the 16th century onward, the Middle East came to be dominated, once again, by two main powers: the Ottoman Empire and the Safavid dynasty. The modern Middle East began after World War I, when the Ottoman Empire, which was allied with the Central Powers, was defeated by the Allies and partitioned into a number of separate nations, initially under British and French Mandates. Other defining events in this transformation included the establishment of Israel in 1948 and the eventual departure of European powers, notably Britain and France by the end of the 1960s. They were supplanted in some part by the rising influence of the United States from the 1970s onwards. In the 20th century, the region's significant stocks of crude oil gave it new strategic and economic importance. Mass production of oil began around 1945, with Saudi Arabia, Iran, Kuwait, Iraq, and the United Arab Emirates having large quantities of oil. Estimated oil reserves, especially in Saudi Arabia and Iran, are some of the highest in the world, and the international oil cartel OPEC is dominated by Middle Eastern countries. During the Cold War, the Middle East was a theater of ideological struggle between the two superpowers and their allies: NATO and the United States on one side, and the Soviet Union and Warsaw Pact on the other, as they competed to influence regional allies. Besides the political reasons there was also the "ideological conflict" between the two systems. Moreover, as Louise Fawcett argues, among many important areas of contention, or perhaps more accurately of anxiety, were, first, the desires of the superpowers to gain strategic advantage in the region, second, the fact that the region contained some two-thirds of the world's oil reserves in a context where oil was becoming increasingly vital to the economy of the Western world [...] Within this contextual framework, the United States sought to divert the Arab world from Soviet influence. Throughout the 20th and 21st centuries, the region has experienced both periods of relative peace and tolerance and periods of conflict particularly between Sunnis and Shiites. Geography In 2018, the MENA region emitted 3.2 billion tonnes of carbon dioxide and produced 8.7% of global greenhouse gas emissions (GHG) despite making up only 6% of the global population. These emissions are mostly from the energy sector, an integral component of many Middle Eastern and North African economies due to the extensive oil and natural gas reserves that are found within the region. The Middle East region is one of the most vulnerable to climate change. The impacts include increase in drought conditions, aridity, heatwaves and sea level rise. Sharp global temperature and sea level changes, shifting precipitation patterns and increased frequency of extreme weather events are some of the main impacts of climate change as identified by the Intergovernmental Panel on Climate Change (IPCC). The MENA region is especially vulnerable to such impacts due to its arid and semi-arid environment, facing climatic challenges such as low rainfall, high temperatures and dry soil. The climatic conditions that foster such challenges for MENA are projected by the IPCC to worsen throughout the 21st century. If greenhouse gas emissions are not significantly reduced, part of the MENA region risks becoming uninhabitable before the year 2100. Climate change is expected to put significant strain on already scarce water and agricultural resources within the MENA region, threatening the national security and political stability of all included countries. Over 60 percent of the region's population lives in high and very high water-stressed areas compared to the global average of 35 percent. This has prompted some MENA countries to engage with the issue of climate change on an international level through environmental accords such as the Paris Agreement. Law and policy are also being established on a national level amongst MENA countries, with a focus on the development of renewable energies. Economy Middle Eastern economies range from being very poor (such as Gaza and Yemen) to extremely wealthy nations (such as Qatar and UAE). According to the International Monetary Fund, the three largest Middle Eastern economies in nominal GDP in 2023 were Saudi Arabia ($1.06 trillion), Turkey ($1.03 trillion), and Israel ($0.54 trillion). For nominal GDP per person, the highest ranking countries are Qatar ($83,891), Israel ($55,535), the United Arab Emirates ($49,451) and Cyprus ($33,807). Turkey ($3.6 trillion), Saudi Arabia ($2.3 trillion), and Iran ($1.7 trillion) had the largest economies in terms of GDP PPP. For GDP PPP per person, the highest-ranking countries are Qatar ($124,834), the United Arab Emirates ($88,221), Saudi Arabia ($64,836), Bahrain ($60,596) and Israel ($54,997). The lowest-ranking country in the Middle East, in terms of GDP nominal per capita, is Yemen ($573). The economic structure of Middle Eastern nations are different because while some are heavily dependent on export of only oil and oil-related products (Saudi Arabia, the UAE and Kuwait), others have a highly diverse economic base (such as Cyprus, Israel, Turkey and Egypt). Industries of the Middle Eastern region include oil and oil-related products, agriculture, cotton, cattle, dairy, textiles, leather products, surgical instruments, defence equipment (guns, ammunition, tanks, submarines, fighter jets, UAVs, and missiles). Banking is an important sector, especially for UAE and Bahrain. With the exception of Cyprus, Turkey, Egypt, Lebanon and Israel, tourism has been a relatively undeveloped area of the economy, in part because of the socially conservative nature of the region as well as political turmoil in certain regions. Since the end of the COVID pandemic however, countries such as the UAE, Bahrain, and Jordan have begun attracting greater numbers of tourists because of improving tourist facilities and the relaxing of tourism-related restrictive policies. Unemployment is high in the Middle East and North Africa region, particularly among people aged 15–29, a demographic representing 30% of the region's population. The total regional unemployment rate in 2025 is 10.8%, and among youth is as high as 28%. Demographics Arabs constitute the largest ethnic group in the Middle East, followed by various Iranian peoples and then by Turkic peoples (Turkish, Azeris, Syrian Turkmen, and Iraqi Turkmen). Native ethnic groups of the region include, in addition to Arabs, Arameans, Assyrians, Baloch, Berbers, Copts, Druze, Greek Cypriots, Jews, Kurds, Lurs, Mandaeans, Persians, Samaritans, Shabaks, Tats, and Zazas. European ethnic groups that form a diaspora in the region include Albanians, Bosniaks, Circassians (including Kabardians), Crimean Tatars, Greeks, Franco-Levantines, Italo-Levantines, and Iraqi Turkmens. Among other migrant populations are Chinese, Filipinos, Indians, Indonesians, Pakistanis, Pashtuns, Romani, and Afro-Arabs. "Migration has always provided an important vent for labor market pressures in the Middle East. For the period between the 1970s and 1990s, the Arab states of the Persian Gulf in particular provided a rich source of employment for workers from Egypt, Yemen and the countries of the Levant, while Europe had attracted young workers from North African countries due both to proximity and the legacy of colonial ties between France and the majority of North African states." According to the International Organization for Migration, there are 13 million first-generation migrants from Arab nations in the world, of which 5.8 reside in other Arab countries. Expatriates from Arab countries contribute to the circulation of financial and human capital in the region and thus significantly promote regional development. In 2009 Arab countries received a total of US$35.1 billion in remittance in-flows and remittances sent to Jordan, Egypt and Lebanon from other Arab countries are 40 to 190 per cent higher than trade revenues between these and other Arab countries. In Somalia, the Somali Civil War has greatly increased the size of the Somali diaspora, as many of the best educated Somalis left for Middle Eastern countries as well as Europe and North America. Non-Arab Middle Eastern countries such as Turkey, Israel and Iran are also subject to important migration dynamics. A fair proportion of those migrating from Arab nations are from ethnic and religious minorities facing persecution and are not necessarily ethnic Arabs, Iranians or Turks.[citation needed] Large numbers of Kurds, Jews, Assyrians, Greeks and Armenians as well as many Mandeans have left nations such as Iraq, Iran, Syria and Turkey for these reasons during the last century. In Iran, many religious minorities such as Christians, Baháʼís, Jews and Zoroastrians have left since the Islamic Revolution of 1979. The Middle East is very diverse when it comes to religions, many of which originated there. Islam is the largest religion in the Middle East, but other faiths that originated there, such as Judaism and Christianity, are also well represented. Christian communities have played a vital role in the Middle East, and they represent 78% of Cyprus population, and 40.5% of Lebanon, where the Lebanese president, half of the cabinet, and half of the parliament follow one of the various Lebanese Christian rites. There are also important minority religions like the Baháʼí Faith, Yarsanism, Yazidism, Zoroastrianism, Mandaeism, Druze, and Shabakism, and in ancient times the region was home to Mesopotamian religions, Canaanite religions, Manichaeism, Mithraism and various monotheist gnostic sects. The six top languages, in terms of numbers of speakers, are Arabic, Persian, Turkish, Kurdish, Modern Hebrew and Greek. About 20 minority languages are also spoken in the Middle East. Arabic, with all its dialects, is the most widely spoken language in the Middle East, with Literary Arabic being official in all North African and in most West Asian countries. Arabic dialects are also spoken in some adjacent areas in neighbouring Middle Eastern non-Arab countries. It is a member of the Semitic branch of the Afro-Asiatic languages. Several Modern South Arabian languages such as Mehri and Soqotri are also spoken in Yemen and Oman. Another Semitic language is Aramaic and its dialects are spoken mainly by Assyrians and Mandaeans, with Western Aramaic still spoken in two villages near Damascus, Syria. There is also an Oasis Berber-speaking community in Egypt where the language is also known as Siwa. It is a non-Semitic Afro-Asiatic sister language. Persian is the second most spoken language. While it is primarily spoken in Iran and some border areas in neighbouring countries, the country is one of the region's largest and most populous. It belongs to the Indo-Iranian branch of the family of Indo-European languages. Other Western Iranic languages spoken in the region include Achomi, Daylami, Kurdish dialects, Semmani, Lurish, amongst many others. The close third-most widely spoken language, Turkish, is largely confined to Turkey, which is also one of the region's largest and most populous countries, but it is present in areas in neighboring countries. It is a member of the Turkic languages, which have their origins in East Asia. Another Turkic language, Azerbaijani, is spoken by Azerbaijanis in Iran. The fourth-most widely spoken language, Kurdish, is spoken in the countries of Iran, Iraq, Syria and Turkey, Sorani Kurdish is the second official language in Iraq (instated after the 2005 constitution) after Arabic. Hebrew is the official language of Israel, with Arabic given a special status after the 2018 Basic law lowered its status from an official language prior to 2018. Hebrew is spoken and used by over 80% of Israel's population, the other 20% using Arabic. Modern Hebrew only began being spoken in the 20th century after being revived in the late 19th century by Elizer Ben-Yehuda (Elizer Perlman) and European Jewish settlers, with the first native Hebrew speaker being born in 1882. Greek is one of the two official languages of Cyprus, and the country's main language. Small communities of Greek speakers exist all around the Middle East; until the 20th century it was also widely spoken in Asia Minor (being the second most spoken language there, after Turkish) and Egypt. During the antiquity, Ancient Greek was the lingua franca for many areas of the western Middle East and until the Muslim expansion it was widely spoken there as well. Until the late 11th century, it was also the main spoken language in Asia Minor; after that it was gradually replaced by the Turkish language as the Anatolian Turks expanded and the local Greeks were assimilated, especially in the interior. English is one of the official languages of Akrotiri and Dhekelia. It is also commonly taught and used as a foreign second language, in countries such as Egypt, Jordan, Iran, Iraq, Qatar, Bahrain, United Arab Emirates and Kuwait. It is also a main language in some Emirates of the United Arab Emirates. It is also spoken as native language by Jewish immigrants from Anglophone countries (UK, US, Australia) in Israel and understood widely as second language there. French is taught and used in many government facilities and media in Lebanon, and is taught in some primary and secondary schools of Egypt and Syria. Maltese, a Semitic language mainly spoken in Europe, is used by the Franco-Maltese diaspora in Egypt. Due to widespread immigration of French Jews to Israel, it is the native language of approximately 200,000 Jews in Israel. Armenian speakers are to be found in the region. Georgian is spoken by the Georgian diaspora. Russian is spoken by a large portion of the Israeli population, because of emigration in the late 1990s. Russian today is a popular unofficial language in use in Israel; news, radio and sign boards can be found in Russian around the country after Hebrew and Arabic. Circassian is also spoken by the diaspora in the region and by almost all Circassians in Israel who speak Hebrew and English as well. The largest Romanian-speaking community in the Middle East is found in Israel, where as of 1995[update] Romanian is spoken by 5% of the population.[d] Bengali, Hindi and Urdu are widely spoken by migrant communities in many Middle Eastern countries, such as Saudi Arabia (where 20–25% of the population is South Asian), the United Arab Emirates (where 50–55% of the population is South Asian), and Qatar, which have large numbers of Pakistani, Bangladeshi and Indian immigrants. Culture The Middle East has recently become more prominent in hosting global sport events due to its wealth and desire to diversify its economy. The South Asian diaspora is a major backer of cricket in the region. See also Notes References Further reading External links 29°N 41°E / 29°N 41°E / 29; 41 |
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Contents PlayStation (console) The PlayStation[a] (codenamed PSX, abbreviated as PS, and retroactively PS1 or PS one) is a home video game console developed and marketed by Sony Computer Entertainment. It was released in Japan on 3 December 1994, followed by North America on 9 September 1995, Europe on 29 September 1995, and other regions following thereafter. As a fifth-generation console, the PlayStation primarily competed with the Nintendo 64 and the Sega Saturn. Sony began developing the PlayStation after a failed venture with Nintendo to create a CD-ROM peripheral for the Super Nintendo Entertainment System in the early 1990s. The console was primarily designed by Ken Kutaragi and Sony Computer Entertainment in Japan, while additional development was outsourced in the United Kingdom. An emphasis on 3D polygon graphics was placed at the forefront of the console's design. PlayStation game production was designed to be streamlined and inclusive, enticing the support of many third party developers. The console proved popular for its extensive game library, popular franchises, low retail price, and aggressive youth marketing which advertised it as the preferable console for adolescents and adults. Critically acclaimed games that defined the console include Gran Turismo, Crash Bandicoot, Spyro the Dragon, Tomb Raider, Resident Evil, Metal Gear Solid, Tekken 3, and Final Fantasy VII. Sony ceased production of the PlayStation on 23 March 2006—over eleven years after it had been released, and in the same year the PlayStation 3 debuted. More than 4,000 PlayStation games were released, with cumulative sales of 962 million units. The PlayStation signaled Sony's rise to power in the video game industry. It received acclaim and sold strongly; in less than a decade, it became the first computer entertainment platform to ship over 100 million units. Its use of compact discs heralded the game industry's transition from cartridges. The PlayStation's success led to a line of successors, beginning with the PlayStation 2 in 2000. In the same year, Sony released a smaller and cheaper model, the PS one. History The PlayStation was conceived by Ken Kutaragi, a Sony executive who managed a hardware engineering division and was later dubbed "the Father of the PlayStation". Kutaragi's interest in working with video games stemmed from seeing his daughter play games on Nintendo's Famicom. Kutaragi convinced Nintendo to use his SPC-700 sound processor in the Super Nintendo Entertainment System (SNES) through a demonstration of the processor's capabilities. His willingness to work with Nintendo was derived from both his admiration of the Famicom and conviction in video game consoles becoming the main home-use entertainment systems. Although Kutaragi was nearly fired because he worked with Nintendo without Sony's knowledge, president Norio Ohga recognised the potential in Kutaragi's chip and decided to keep him as a protégé. The inception of the PlayStation dates back to a 1988 joint venture between Nintendo and Sony. Nintendo had produced floppy disk technology to complement cartridges in the form of the Family Computer Disk System, and wanted to continue this complementary storage strategy for the SNES. Since Sony was already contracted to produce the SPC-700 sound processor for the SNES, Nintendo contracted Sony to develop a CD-ROM add-on, tentatively titled the "Play Station" or "SNES-CD". The PlayStation name had already been trademarked by Yamaha, but Nobuyuki Idei liked it so much that he agreed to acquire it for an undisclosed sum rather than search for an alternative. Sony was keen to obtain a foothold in the rapidly expanding video game market. Having been the primary manufacturer of the MSX home computer format, Sony had wanted to use their experience in consumer electronics to produce their own video game hardware. Although the initial agreement between Nintendo and Sony was about producing a CD-ROM drive add-on, Sony had also planned to develop a SNES-compatible Sony-branded console. This iteration was intended to be more of a home entertainment system, playing both SNES cartridges and a new CD format named the "Super Disc", which Sony would design. Under the agreement, Sony would retain sole international rights to every Super Disc game, giving them a large degree of control despite Nintendo's leading position in the video game market. Furthermore, Sony would also be the sole benefactor of licensing related to music and film software that it had been aggressively pursuing as a secondary application. The Play Station was to be announced at the 1991 Consumer Electronics Show (CES) in Las Vegas. However, Nintendo president Hiroshi Yamauchi was wary of Sony's increasing leverage at this point and deemed the original 1988 contract unacceptable upon realising it essentially handed Sony control over all games written on the SNES CD-ROM format. Although Nintendo was dominant in the video game market, Sony possessed a superior research and development department. Wanting to protect Nintendo's existing licensing structure, Yamauchi cancelled all plans for the joint Nintendo–Sony SNES CD attachment without telling Sony. He sent Nintendo of America president Minoru Arakawa (his son-in-law) and chairman Howard Lincoln to Amsterdam to form a more favourable contract with Dutch conglomerate Philips, Sony's rival. This contract would give Nintendo total control over their licences on all Philips-produced machines. Kutaragi and Nobuyuki Idei, Sony's director of public relations at the time, learned of Nintendo's actions two days before the CES was due to begin. Kutaragi telephoned numerous contacts, including Philips, to no avail. On the first day of the CES, Sony announced their partnership with Nintendo and their new console, the Play Station. At 9 am on the next day, in what has been called "the greatest ever betrayal" in the industry, Howard Lincoln stepped onto the stage and revealed that Nintendo was now allied with Philips and would abandon their work with Sony. Incensed by Nintendo's renouncement, Ohga and Kutaragi decided that Sony would develop their own console. Nintendo's contract-breaking was met with consternation in the Japanese business community, as they had broken an "unwritten law" of native companies not turning against each other in favour of foreign ones. Sony's American branch considered allying with Sega to produce a CD-ROM-based machine called the Sega Multimedia Entertainment System, but the Sega board of directors in Tokyo vetoed the idea when Sega of America CEO Tom Kalinske presented them the proposal. Kalinske recalled them saying: "That's a stupid idea, Sony doesn't know how to make hardware. They don't know how to make software either. Why would we want to do this?" Sony halted their research, but decided to develop what it had developed with Nintendo and Sega into a console based on the SNES. Despite the tumultuous events at the 1991 CES, negotiations between Nintendo and Sony were still ongoing. A deal was proposed: the Play Station would still have a port for SNES games, on the condition that it would still use Kutaragi's audio chip and that Nintendo would own the rights and receive the bulk of the profits. Roughly two hundred prototype machines were created, and some software entered development. Many within Sony were still opposed to their involvement in the video game industry, with some resenting Kutaragi for jeopardising the company. Kutaragi remained adamant that Sony not retreat from the growing industry and that a deal with Nintendo would never work. Knowing that they had to take decisive action, Sony severed all ties with Nintendo on 4 May 1992. To determine the fate of the PlayStation project, Ohga chaired a meeting in June 1992, consisting of Kutaragi and several senior Sony board members. Kutaragi unveiled a proprietary CD-ROM-based system he had been secretly working on which played games with immersive 3D graphics. Kutaragi was confident that his LSI chip could accommodate one million logic gates, which exceeded the capabilities of Sony's semiconductor division at the time. Despite gaining Ohga's enthusiasm, there remained opposition from a majority present at the meeting. Older Sony executives also opposed it, who saw Nintendo and Sega as "toy" manufacturers. The opposers felt the game industry was too culturally offbeat and asserted that Sony should remain a central player in the audiovisual industry, where companies were familiar with one another and could conduct "civili[s]ed" business negotiations. After Kutaragi reminded him of the humiliation he suffered from Nintendo, Ohga retained the project and became one of Kutaragi's most staunch supporters. Ohga shifted Kutaragi and nine of his team from Sony's main headquarters to Sony Music Entertainment Japan (SMEJ), a subsidiary of the main Sony group, so as to retain the project and maintain relationships with Philips for the MMCD development project. The involvement of SMEJ proved crucial to the PlayStation's early development as the process of manufacturing games on CD-ROM format was similar to that used for audio CDs, with which Sony's music division had considerable experience. While at SMEJ, Kutaragi worked with Epic/Sony Records founder Shigeo Maruyama and Akira Sato; both later became vice-presidents of the division that ran the PlayStation business. Sony Computer Entertainment (SCE) was jointly established by Sony and SMEJ to handle the company's ventures into the video game industry. On 27 October 1993, Sony publicly announced that it was entering the game console market with the PlayStation. According to Maruyama, there was uncertainty over whether the console should primarily focus on 2D, sprite-based graphics or 3D polygon graphics. After Sony witnessed the success of Sega's Virtua Fighter (1993) in Japanese arcades, the direction of the PlayStation became "instantly clear" and 3D polygon graphics became the console's primary focus. SCE president Teruhisa Tokunaka expressed gratitude for Sega's timely release of Virtua Fighter as it proved "just at the right time" that making games with 3D imagery was possible. Maruyama claimed that Sony further wanted to emphasise the new console's ability to utilise redbook audio from the CD-ROM format in its games alongside high quality visuals and gameplay. Wishing to distance the project from the failed enterprise with Nintendo, Sony initially branded the PlayStation the "PlayStation X" (PSX). Sony formed their European division and North American division, known as Sony Computer Entertainment Europe (SCEE) and Sony Computer Entertainment America (SCEA), in January and May 1995. The divisions planned to market the new console under the alternative branding "PSX" following the negative feedback regarding "PlayStation" in focus group studies. Early advertising prior to the console's launch in North America referenced PSX, but the term was scrapped before launch. The console was not marketed with Sony's name in contrast to Nintendo's consoles. According to Phil Harrison, much of Sony's upper management feared that the Sony brand would be tarnished if associated with the console, which they considered a "toy". Since Sony had no experience in game development, it had to rely on the support of third-party game developers. This was in contrast to Sega and Nintendo, which had versatile and well-equipped in-house software divisions for their arcade games and could easily port successful games to their home consoles. Recent consoles like the Atari Jaguar and 3DO suffered low sales due to a lack of developer support, prompting Sony to redouble their efforts in gaining the endorsement of arcade-savvy developers. A team from Epic Sony visited more than a hundred companies throughout Japan in May 1993 in hopes of attracting game creators with the PlayStation's technological appeal. Sony found that many disliked Nintendo's practices, such as favouring their own games over others. Through a series of negotiations, Sony acquired initial support from Namco, Konami, and Williams Entertainment, as well as 250 other development teams in Japan alone. Namco in particular was interested in developing for PlayStation since Namco rivalled Sega in the arcade market. Attaining these companies secured influential games such as Ridge Racer (1993) and Mortal Kombat 3 (1995), Ridge Racer being one of the most popular arcade games at the time, and it was already confirmed behind closed doors that it would be the PlayStation's first game by December 1993, despite Namco being a longstanding Nintendo developer. Namco's research managing director Shegeichi Nakamura met with Kutaragi in 1993 to discuss the preliminary PlayStation specifications, with Namco subsequently basing the Namco System 11 arcade board on PlayStation hardware and developing Tekken to compete with Virtua Fighter. The System 11 launched in arcades several months before the PlayStation's release, with the arcade release of Tekken in September 1994. Despite securing the support of various Japanese studios, Sony had no developers of their own by the time the PlayStation was in development. This changed in 1993 when Sony acquired the Liverpudlian company Psygnosis (later renamed SCE Liverpool) for US$48 million, securing their first in-house development team. The acquisition meant that Sony could have more launch games ready for the PlayStation's release in Europe and North America. Ian Hetherington, Psygnosis' co-founder, was disappointed after receiving early builds of the PlayStation and recalled that the console "was not fit for purpose" until his team got involved with it. Hetherington frequently clashed with Sony executives over broader ideas; at one point it was suggested that a television with a built-in PlayStation be produced. In the months leading up to the PlayStation's launch, Psygnosis had around 500 full-time staff working on games and assisting with software development. The purchase of Psygnosis marked another turning point for the PlayStation as it played a vital role in creating the console's development kits. While Sony had provided MIPS R4000-based Sony NEWS workstations for PlayStation development, Psygnosis employees disliked the thought of developing on these expensive workstations and asked Bristol-based SN Systems to create an alternative PC-based development system. Andy Beveridge and Martin Day, owners of SN Systems, had previously supplied development hardware for other consoles such as the Mega Drive, Atari ST, and the SNES. When Psygnosis arranged an audience for SN Systems with Sony's Japanese executives at the January 1994 CES in Las Vegas, Beveridge and Day presented their prototype of the condensed development kit, which could run on an ordinary personal computer with two extension boards. Impressed, Sony decided to abandon their plans for a workstation-based development system in favour of SN Systems's, thus securing a cheaper and more efficient method for designing software. An order of over 600 systems followed, and SN Systems supplied Sony with additional software such as an assembler, linker, and a debugger. SN Systems produced development kits for future PlayStation systems, including the PlayStation 2 and was bought out by Sony in 2005. Sony strived to make game production as streamlined and inclusive as possible, in contrast to the relatively isolated approach of Sega and Nintendo. Phil Harrison, representative director of SCEE, believed that Sony's emphasis on developer assistance reduced most time-consuming aspects of development. As well as providing programming libraries, SCE headquarters in London, California, and Tokyo housed technical support teams that could work closely with third-party developers if needed. Sony did not favour their own over non-Sony products, unlike Nintendo; Peter Molyneux of Bullfrog Productions admired Sony's open-handed approach to software developers and lauded their decision to use PCs as a development platform, remarking that "[it was] like being released from jail in terms of the freedom you have". Another strategy that helped attract software developers was the PlayStation's use of the CD-ROM format instead of traditional cartridges. Nintendo cartridges were expensive to manufacture, and the company controlled all production, prioritising their own games, while inexpensive compact disc manufacturing occurred at dozens of locations around the world. The PlayStation's architecture and interconnectability with PCs was beneficial to many software developers. The use of the programming language C proved useful, as it safeguarded future compatibility of the machine should developers decide to make further hardware revisions. Despite the inherent flexibility, some developers found themselves restricted due to the console's lack of RAM. While working on beta builds of the PlayStation, Molyneux observed that its MIPS processor was not "quite as bullish" compared to that of a fast PC and said that it took his team two weeks to port their PC code to the PlayStation development kits and another fortnight to achieve a four-fold speed increase. An engineer from Ocean Software, one of Europe's largest game developers at the time, thought that allocating RAM was a challenging aspect given the 3.5 megabyte restriction. Kutaragi said that while it would have been easy to double the amount of RAM for the PlayStation, the development team refrained from doing so to keep the retail cost down. Kutaragi saw the biggest challenge in developing the system to be balancing the conflicting goals of high performance, low cost, and being easy to program for, and felt he and his team were successful in this regard. Its technical specifications were finalised in 1993 and its design during 1994. The PlayStation name and its final design were confirmed during a press conference on May 10, 1994, although the price and release dates had not been disclosed yet. Sony released the PlayStation in Japan on 3 December 1994, a week after the release of the Sega Saturn, at a price of ¥39,800. Sales in Japan began with a "stunning" success with long queues in shops. Ohga later recalled that he realised how important PlayStation had become for Sony when friends and relatives begged for consoles for their children. PlayStation sold 100,000 units on the first day and two million units within six months, although the Saturn outsold the PlayStation in the first few weeks due to the success of Virtua Fighter. By the end of 1994, 300,000 PlayStation units were sold in Japan compared to 500,000 Saturn units. A grey market emerged for PlayStations shipped from Japan to North America and Europe, with buyers of such consoles paying up to £700. "When September 1995 arrived and Sony's Playstation roared out of the gate, things immediately felt different than [sic] they did with the Saturn launch earlier that year. Sega dropped the Saturn $100 to match the Playstation's $299 debut price, but sales weren't even close—Playstations flew out the door as fast as we could get them in stock. Before the release in North America, Sega and Sony presented their consoles at the first Electronic Entertainment Expo (E3) in Los Angeles on 11 May 1995. At their keynote presentation, Sega of America CEO Tom Kalinske revealed that their Saturn console would be released immediately to select retailers at a price of $399. Next came Sony's turn: Olaf Olafsson, the head of SCEA, summoned Steve Race, the head of development, to the conference stage, who said "$299" and left the audience with a round of applause. The attention to the Sony conference was further bolstered by the surprise appearance of Michael Jackson and the showcase of highly anticipated games, including Wipeout (1995), Ridge Racer and Tekken (1994). In addition, Sony announced that no games would be bundled with the console. Although the Saturn had released early in the United States to gain an advantage over the PlayStation, the surprise launch upset many retailers who were not informed in time, harming sales. Some retailers such as KB Toys responded by dropping the Saturn entirely. The PlayStation went on sale in North America on 9 September 1995. It sold more units within two days than the Saturn had in five months, with almost all of the initial shipment of 100,000 units sold in advance and shops across the country running out of consoles and accessories. The well-received Ridge Racer contributed to the PlayStation's early success, — with some critics considering it superior to Sega's arcade counterpart Daytona USA (1994) — as did Battle Arena Toshinden (1995). There were over 100,000 pre-orders placed and 17 games available on the market by the time of the PlayStation's American launch, in comparison to the Saturn's six launch games. The PlayStation released in Europe on 29 September 1995 and in Australia on 15 November 1995. By November it had already outsold the Saturn by three to one in the United Kingdom, where Sony had allocated a £20 million marketing budget during the Christmas season compared to Sega's £4 million. Sony found early success in the United Kingdom by securing listings with independent shop owners as well as prominent High Street chains such as Comet and Argos. Within its first year, the PlayStation secured over 20% of the entire American video game market. From September to the end of 1995, sales in the United States amounted to 800,000 units, giving the PlayStation a commanding lead over the other fifth-generation consoles,[b] though the SNES and Mega Drive from the fourth generation still outsold it. Sony reported that the attach rate of sold games and consoles was four to one. To meet increasing demand, Sony chartered jumbo jets and ramped up production in Europe and North America. By early 1996, the PlayStation had grossed $2 billion (equivalent to $4.106 billion 2025) from worldwide hardware and software sales. By late 1996, sales in Europe totalled 2.2 million units, including 700,000 in the UK. Approximately 400 PlayStation games were in development, compared to around 200 games being developed for the Saturn and 60 for the Nintendo 64. In India, the PlayStation was launched in test market during 1999–2000 across Sony showrooms, selling 100 units. Sony finally launched the console (PS One model) countrywide on 24 January 2002 with the price of Rs 7,990 and 26 games available from start. PlayStation was also doing well in markets where it was never officially released. For example, in Brazil, due to the registration of the trademark by a third company, the console could not be released, which was why the market was taken over by the officially distributed Sega Saturn during the first period, but as the Sega console withdraws, PlayStation imports and large piracy increased. In another market, China, the most popular 32-bit console was Sega Saturn, but after leaving the market, PlayStation grown with a base of 300,000 users until January 2000, although Sony China did not have plans to release it. The PlayStation was backed by a successful marketing campaign, allowing Sony to gain an early foothold in Europe and North America. Initially, PlayStation demographics were skewed towards adults, but the audience broadened after the first price drop. While the Saturn was positioned towards 18- to 34-year-olds, the PlayStation was initially marketed exclusively towards teenagers. Executives from both Sony and Sega reasoned that because younger players typically looked up to older, more experienced players, advertising targeted at teens and adults would draw them in too. Additionally, Sony found that adults reacted best to advertising aimed at teenagers; Lee Clow surmised that people who started to grow into adulthood regressed and became "17 again" when they played video games. The console was marketed with advertising slogans stylised as "LIVE IN YUR WRLD. PLY IN URS" (Live in Your World. Play in Ours.) and "U R NOT E" (red E). The four geometric shapes were derived from the symbols for the four buttons on the controller. Clow thought that by invoking such provocative statements, gamers would respond to the contrary and say "'Bullshit. Let me show you how ready I am.'" As the console's appeal enlarged, Sony's marketing efforts broadened from their earlier focus on mature players to specifically target younger children as well. Shortly after the PlayStation's release in Europe, Sony tasked marketing manager Geoff Glendenning with assessing the desires of a new target audience. Sceptical over Nintendo and Sega's reliance on television campaigns, Glendenning theorised that young adults transitioning from fourth-generation consoles would feel neglected by marketing directed at children and teenagers. Recognising the influence early 1990s underground clubbing and rave culture had on young people, especially in the United Kingdom, Glendenning felt that the culture had become mainstream enough to help cultivate PlayStation's emerging identity. Sony partnered with prominent nightclub owners such as Ministry of Sound and festival promoters to organise dedicated PlayStation areas where demonstrations of select games could be tested. Sheffield-based graphic design studio The Designers Republic was contracted by Sony to produce promotional materials aimed at a fashionable, club-going audience. Psygnosis' Wipeout in particular became associated with nightclub culture as it was widely featured in venues. By 1997, there were 52 nightclubs in the United Kingdom with dedicated PlayStation rooms. Glendenning recalled that he had discreetly used at least £100,000 a year in slush fund money to invest in impromptu marketing. In 1996, Sony expanded their CD production facilities in the United States due to the high demand for PlayStation games, increasing their monthly output from 4 million discs to 6.5 million discs. This was necessary because PlayStation sales were running at twice the rate of Saturn sales, and its lead dramatically increased when both consoles dropped in price to $199 that year. The PlayStation also outsold the Saturn at a similar ratio in Europe during 1996, with 2.2 million consoles sold in the region by the end of the year. Sales figures for PlayStation hardware and software only increased following the launch of the Nintendo 64. Tokunaka speculated that the Nintendo 64 launch had actually helped PlayStation sales by raising public awareness of the gaming market through Nintendo's added marketing efforts. Despite this, the PlayStation took longer to achieve dominance in Japan. Tokunaka said that, even after the PlayStation and Saturn had been on the market for nearly two years, the competition between them was still "very close", and neither console had led in sales for any meaningful length of time. By 1998, Sega, encouraged by their declining market share and significant financial losses, launched the Dreamcast as a last-ditch attempt to stay in the industry. Although its launch was successful, the technically superior 128-bit console was unable to subdue Sony's dominance in the industry. Sony still held 60% of the overall video game market share in North America at the end of 1999. Sega's initial confidence in their new console was undermined when Japanese sales were lower than expected, with disgruntled Japanese consumers reportedly returning their Dreamcasts in exchange for PlayStation software. On 2 March 1999, Sony officially revealed details of the PlayStation 2, which Kutaragi announced would feature a graphics processor designed to push more raw polygons than any console in history, effectively rivalling most supercomputers. The PlayStation continued to sell strongly at the turn of the new millennium: in June 2000, Sony released the PSOne, a smaller, redesigned variant which went on to outsell all other consoles in that year, including the PlayStation 2. In 2005, PlayStation became the first console to ship 100 million units with the PlayStation 2 later achieving this faster than its predecessor. The combined successes of both PlayStation consoles led to Sega retiring the Dreamcast in 2001, and abandoning the console business entirely. The PlayStation was eventually discontinued on 23 March 2006—over eleven years after its release, and less than a year before the debut of the PlayStation 3. Hardware The main microprocessor is a R3000 CPU made by LSI Logic operating at a clock rate of 33.8688 MHz and 30 MIPS. This 32-bit CPU relies heavily on the "cop2" 3D and matrix math coprocessor on the same die to provide the necessary speed to render complex 3D graphics. The role of the separate GPU chip is to draw 2D polygons and apply shading and textures to them: the rasterisation stage of the graphics pipeline. Sony's custom 16-bit sound chip supports ADPCM sources with up to 24 sound channels and offers a sampling rate of up to 44.1 kHz and music sequencing. It features 2 MB of main RAM, with an additional 1 MB of video RAM. The PlayStation has a maximum colour depth of 16.7 million true colours with 32 levels of transparency and unlimited colour look-up tables. The PlayStation can output composite, S-Video or RGB video signals through its AV Multi connector (with older models also having RCA connectors for composite), displaying resolutions from 256×224 to 640×480 pixels. Different games can use different resolutions. Earlier models also had proprietary parallel and serial ports that could be used to connect accessories or multiple consoles together; these were later removed due to a lack of usage. The PlayStation uses a proprietary video compression unit, MDEC, which is integrated into the CPU and allows for the presentation of full motion video at a higher quality than other consoles of its generation. Unusual for the time, the PlayStation lacks a dedicated 2D graphics processor; 2D elements are instead calculated as polygons by the Geometry Transfer Engine (GTE) so that they can be processed and displayed on screen by the GPU. While running, the GPU can also generate a total of 4,000 sprites and 180,000 polygons per second, in addition to 360,000 per second flat-shaded. The PlayStation went through a number of variants during its production run. Externally, the most notable change was the gradual reduction in the number of external connectors from the rear of the unit. This started with the original Japanese launch units; the SCPH-1000, released on 3 December 1994, was the only model that had an S-Video port, as it was removed from the next model. Subsequent models saw a reduction in number of parallel ports, with the final version only retaining one serial port. Sony marketed a development kit for amateur developers known as the Net Yaroze (meaning "Let's do it together" in Japanese). It was launched in June 1996 in Japan, and following public interest, was released the next year in other countries. The Net Yaroze allowed hobbyists to create their own games and upload them via an online forum run by Sony. The console was only available to buy through an ordering service and with the necessary documentation and software to program PlayStation games and applications through C programming compilers. On 7 July 2000, Sony released the PS One (stylised as "PS one" or "PSone"), a smaller, redesigned version of the original PlayStation. It was the highest-selling console through the end of the year, outselling all other consoles—including the PlayStation 2. In 2002, Sony released a 5-inch (130 mm) LCD screen add-on for the PS One, referred to as the "Combo pack". It also included a car cigarette lighter adaptor adding an extra layer of portability. Production of the LCD "Combo Pack" ceased in 2004, when the popularity of the PlayStation began to wane in markets outside Japan. A total of 28.15 million PS One units had been sold by the time it was discontinued in March 2006. Three iterations of the PlayStation's controller were released over the console's lifespan. The first controller, the PlayStation controller, was released alongside the PlayStation in December 1994. It features four individual directional buttons (as opposed to a conventional D-pad), a pair of shoulder buttons on both sides, Start and Select buttons in the centre, and four face buttons consisting of simple geometric shapes: a green triangle, red circle, blue cross, and a pink square (, , , ). Rather than depicting traditionally used letters or numbers onto its buttons, the PlayStation controller established a trademark which would be incorporated heavily into the PlayStation brand. Teiyu Goto, the designer of the original PlayStation controller, said that the circle and cross represent "yes" and "no", respectively (though this layout is reversed in Western versions); the triangle symbolises a point of view and the square is equated to a sheet of paper to be used to access menus. The European and North American models of the original PlayStation controllers are roughly 10% larger than its Japanese variant, to account for the fact the average person in those regions has larger hands than the average Japanese person. Sony's first analogue gamepad, the PlayStation Analog Joystick (often erroneously referred to as the "Sony Flightstick"), was first released in Japan in April 1996. Featuring two parallel joysticks, it uses potentiometer technology previously used on consoles such as the Vectrex; instead of relying on binary eight-way switches, the controller detects minute angular changes through the entire range of motion. The stick also features a thumb-operated digital hat switch on the right joystick, corresponding to the traditional D-pad, and used for instances when simple digital movements were necessary. The Analog Joystick sold poorly in Japan due to its high cost and cumbersome size. The increasing popularity of 3D games prompted Sony to add analogue sticks to its controller design to give users more freedom over their movements in virtual 3D environments. The first official analogue controller, the Dual Analog Controller, was revealed to the public in a small glass booth at the 1996 PlayStation Expo in Japan, and released in April 1997 to coincide with the Japanese releases of analogue-capable games Tobal 2 and Bushido Blade. In addition to the two analogue sticks (which also introduced two new buttons mapped to clicking in the analogue sticks), the Dual Analog controller features an "Analog" button and LED beneath the "Start" and "Select" buttons which toggles analogue functionality on or off. The controller also features rumble support, though Sony decided that haptic feedback would be removed from all overseas iterations before the United States release. A Sony spokesman stated that the feature was removed for "manufacturing reasons", although rumours circulated that Nintendo had attempted to legally block the release of the controller outside Japan due to similarities with the Nintendo 64 controller's Rumble Pak. However, a Nintendo spokesman denied that Nintendo took legal action. Next Generation's Chris Charla theorised that Sony dropped vibration feedback to keep the price of the controller down. In November 1997, Sony introduced the DualShock controller. Its name derives from its use of two (dual) vibration motors (shock). Unlike its predecessor, its analogue sticks feature textured rubber grips, longer handles, slightly different shoulder buttons and has rumble feedback included as standard on all versions. The DualShock later replaced its predecessors as the default controller. Sony released a series of peripherals to add extra layers of functionality to the PlayStation. Such peripherals include memory cards, the PlayStation Mouse, the PlayStation Link Cable, the Multiplayer Adapter (a four-player multitap), the Memory Drive (a disk drive for 3.5-inch floppy disks), the GunCon (a light gun), and the Glasstron (a monoscopic head-mounted display). Released exclusively in Japan, the PocketStation is a memory card peripheral which acts as a miniature personal digital assistant. The device features a monochrome liquid crystal display (LCD), infrared communication capability, a real-time clock, built-in flash memory, and sound capability. Sharing similarities with the Dreamcast's VMU peripheral, the PocketStation was typically distributed with certain PlayStation games, enhancing them with added features. The PocketStation proved popular in Japan, selling over five million units. Sony planned to release the peripheral outside Japan but the release was cancelled, despite receiving promotion in Europe and North America. In addition to playing games, most PlayStation models are equipped to play CD-Audio. The Asian model SCPH-5903 can also play Video CDs. Like most CD players, the PlayStation can play songs in a programmed order, shuffle the playback order of the disc and repeat one song or the entire disc. Later PlayStation models use a music visualisation function called SoundScope. This function, as well as a memory card manager, is accessed by starting the console without either inserting a game or closing the CD tray, thereby accessing a graphical user interface (GUI) for the PlayStation BIOS. The GUI for the PS One and PlayStation differ depending on the firmware version: the original PlayStation GUI had a dark blue background with rainbow graffiti used as buttons, while the early PAL PlayStation and PS One GUI had a grey blocked background with two icons in the middle. PlayStation emulation is versatile and can be run on numerous modern devices. Bleem! was a commercial emulator which was released for IBM-compatible PCs and the Dreamcast in 1999. It was notable for being aggressively marketed during the PlayStation's lifetime, and was the centre of multiple controversial lawsuits filed by Sony. Bleem! was programmed in assembly language, which allowed it to emulate PlayStation games with improved visual fidelity, enhanced resolutions, and filtered textures that was not possible on original hardware. Sony sued Bleem! two days after its release, citing copyright infringement and accusing the company of engaging in unfair competition and patent infringement by allowing use of PlayStation BIOSs on a Sega console. Bleem! were subsequently forced to shut down in November 2001. Sony was aware that using CDs for game distribution could have left games vulnerable to piracy, due to the growing popularity of CD-R and optical disc drives with burning capability. To preclude illegal copying, a proprietary process for PlayStation disc manufacturing was developed that, in conjunction with an augmented optical drive in Tiger H/E assembly, prevented burned copies of games from booting on an unmodified console. Specifically, all genuine PlayStation discs were printed with a small section of deliberate irregular data, which the PlayStation's optical pick-up was capable of detecting and decoding. Consoles would not boot game discs without a specific wobble frequency contained in the data of the disc pregap sector (the same system was also used to encode discs' regional lockouts). This signal was within Red Book CD tolerances, so PlayStation discs' actual content could still be read by a conventional disc drive; however, the disc drive could not detect the wobble frequency (therefore duplicating the discs omitting it), since the laser pick-up system of any optical disc drive would interpret this wobble as an oscillation of the disc surface and compensate for it in the reading process. Early PlayStations, particularly early 1000 models, experience skipping full-motion video or physical "ticking" noises from the unit. The problems stem from poorly placed vents leading to overheating in some environments, causing the plastic mouldings inside the console to warp slightly and create knock-on effects with the laser assembly. The solution is to sit the console on a surface which dissipates heat efficiently in a well vented area or raise the unit up slightly from its resting surface. Sony representatives also recommended unplugging the PlayStation when it is not in use, as the system draws in a small amount of power (and therefore heat) even when turned off. The first batch of PlayStations use a KSM-440AAM laser unit, whose case and movable parts are all built out of plastic. Over time, the plastic lens sled rail wears out—usually unevenly—due to friction. The placement of the laser unit close to the power supply accelerates wear, due to the additional heat, which makes the plastic more vulnerable to friction. Eventually, one side of the lens sled will become so worn that the laser can tilt, no longer pointing directly at the CD; after this, games will no longer load due to data read errors. Sony fixed the problem by making the sled out of die-cast metal and placing the laser unit further away from the power supply on later PlayStation models. Due to an engineering oversight, the PlayStation does not produce a proper signal on several older models of televisions, causing the display to flicker or bounce around the screen. Sony decided not to change the console design, since only a small percentage of PlayStation owners used such televisions, and instead gave consumers the option of sending their PlayStation unit to a Sony service centre to have an official modchip installed, allowing play on older televisions. Game library The PlayStation featured a diverse game library which grew to appeal to all types of players. Critically acclaimed PlayStation games included Final Fantasy VII (1997), Crash Bandicoot (1996), Spyro the Dragon (1998), Metal Gear Solid (1998), all of which became established franchises. Final Fantasy VII is credited with allowing role-playing games to gain mass-market appeal outside Japan, and is considered one of the most influential and greatest video games ever made. The PlayStation's bestselling game is Gran Turismo (1997), which sold 10.85 million units. After the PlayStation's discontinuation in 2006, the cumulative software shipment was 962 million units. Following its 1994 launch in Japan, early games included Ridge Racer, Crime Crackers, King's Field, Motor Toon Grand Prix, Toh Shin Den (i.e. Battle Arena Toshinden), and Kileak: The Blood. The first two games available at its later North American launch were Jumping Flash! (1995) and Ridge Racer, with Jumping Flash! heralded as an ancestor for 3D graphics in console gaming. Wipeout, Air Combat, Twisted Metal, Warhawk and Destruction Derby were among the popular first-year games, and the first to be reissued as part of Sony's Greatest Hits or Platinum range. At the time of the PlayStation's first Christmas season, Psygnosis had produced around 70% of its launch catalogue; their breakthrough racing game Wipeout was acclaimed for its techno soundtrack and helped raise awareness of Britain's underground music community. Eidos Interactive's action-adventure game Tomb Raider contributed substantially to the success of the console in 1996, with its main protagonist Lara Croft becoming an early gaming icon and garnering unprecedented media promotion. Licensed tie-in video games of popular films were also prevalent; Argonaut Games' 2001 adaptation of Harry Potter and the Philosopher's Stone went on to sell over eight million copies late in the console's lifespan. Third-party developers committed largely to the console's wide-ranging game catalogue even after the launch of the PlayStation 2; some of the notable exclusives in this era include Harry Potter and the Philosopher's Stone, Fear Effect 2: Retro Helix, Syphon Filter 3, C-12: Final Resistance, Dance Dance Revolution Konamix and Digimon World 3.[c] Sony assisted with game reprints as late as 2008 with Metal Gear Solid: The Essential Collection, this being the last PlayStation game officially released and licensed by Sony. Initially, in the United States, PlayStation games were packaged in long cardboard boxes, similar to non-Japanese 3DO and Saturn games. Sony later switched to the jewel case format typically used for audio CDs and Japanese video games, as this format took up less retailer shelf space (which was at a premium due to the large number of PlayStation games being released), and focus testing showed that most consumers preferred this format. Reception The PlayStation was mostly well received upon release. Critics in the west generally welcomed the new console; the staff of Next Generation reviewed the PlayStation a few weeks after its North American launch, where they commented that, while the CPU is "fairly average", the supplementary custom hardware, such as the GPU and sound processor, is stunningly powerful. They praised the PlayStation's focus on 3D, and complemented the comfort of its controller and the convenience of its memory cards. Giving the system 41⁄2 out of 5 stars, they concluded, "To succeed in this extremely cut-throat market, you need a combination of great hardware, great games, and great marketing. Whether by skill, luck, or just deep pockets, Sony has scored three out of three in the first salvo of this war." Albert Kim from Entertainment Weekly praised the PlayStation as a technological marvel, rivalling that of Sega and Nintendo. Famicom Tsūshin scored the console a 19 out of 40, lower than the Saturn's 24 out of 40, in May 1995. In a 1997 year-end review, a team of five Electronic Gaming Monthly editors gave the PlayStation scores of 9.5, 8.5, 9.0, 9.0, and 9.5—for all five editors, the highest score they gave to any of the five consoles reviewed in the issue. They lauded the breadth and quality of the games library, saying it had vastly improved over previous years due to developers mastering the system's capabilities in addition to Sony revising their stance on 2D and role playing games. They also complimented the low price point of the games compared to the Nintendo 64's, and noted that it was the only console on the market that could be relied upon to deliver a solid stream of games for the coming year, primarily due to third party developers almost unanimously favouring it over its competitors. Legacy SCE was an upstart in the video game industry in late 1994, as the video game market in the early 1990s was dominated by Nintendo and Sega. Nintendo had been the clear leader in the industry since the introduction of the Nintendo Entertainment System in 1985 and the Nintendo 64 was initially expected to maintain this position. The PlayStation's target audience included the generation which was the first to grow up with mainstream video games, along with 18- to 29-year-olds who were not the primary focus of Nintendo. By the late 1990s, Sony became a highly regarded console brand due to the PlayStation, with a significant lead over second-place Nintendo, while Sega was relegated to a distant third. The PlayStation became the first "computer entertainment platform" to ship over 100 million units worldwide, with many critics attributing the console's success to third-party developers. It remains the sixth best-selling console of all time as of 2025[update], with a total of 102.49 million units sold. Around 7,900 individual games were published for the console during its 11-year life span, the second-most games ever produced for a console. Its success resulted in a significant financial boon for Sony as profits from their video game division contributed to 23%. Sony's next-generation PlayStation 2, which is backward compatible with the PlayStation's DualShock controller and games, was announced in 1999 and launched in 2000. The PlayStation's lead in installed base and developer support paved the way for the success of its successor, which overcame the earlier launch of the Sega's Dreamcast and then fended off competition from Microsoft's newcomer Xbox and Nintendo's GameCube. The PlayStation 2's immense success and failure of the Dreamcast were among the main factors which led to Sega abandoning the console market. To date, five PlayStation home consoles have been released, which have continued the same numbering scheme, as well as two portable systems. The PlayStation 3 also maintained backward compatibility with original PlayStation discs. Hundreds of PlayStation games have been digitally re-released on the PlayStation Portable, PlayStation 3, PlayStation Vita, PlayStation 4, and PlayStation 5. The PlayStation has often ranked among the best video game consoles. In 2018, Retro Gamer named it the third best console, crediting its sophisticated 3D capabilities as one of its key factors in gaining mass success, and lauding it as a "game-changer in every sense possible". In 2009, IGN ranked the PlayStation the seventh best console in their list, noting its appeal towards older audiences to be a crucial factor in propelling the video game industry, as well as its assistance in transitioning game industry to use the CD-ROM format. Keith Stuart from The Guardian likewise named it as the seventh best console in 2020, declaring that its success was so profound it "ruled the 1990s". In January 2025, Lorentio Brodesco announced the nsOne project, attempting to reverse engineer PlayStation's motherboard. Brodesco stated that "detailed documentation on the original motherboard was either incomplete or entirely unavailable". The project was successfully crowdfunded via Kickstarter. In June, Brodesco manufactured the first working motherboard, promising to bring a fully rooted version with multilayer routing as well as documentation and design files in the near future. The success of the PlayStation contributed to the demise of cartridge-based home consoles. While not the first system to use an optical disc format, it was the first highly successful one, and ended up going head-to-head with the proprietary cartridge-relying Nintendo 64,[d] which the industry had expected to use CDs like PlayStation. After the demise of the Sega Saturn, Nintendo was left as Sony's main competitor in Western markets. Nintendo chose not to use CDs for the Nintendo 64; they were likely concerned with the proprietary cartridge format's ability to help enforce copy protection, given their substantial reliance on licensing and exclusive games for their revenue. Besides their larger capacity, CD-ROMs could be produced in bulk quantities at a much faster rate than ROM cartridges, a week compared to two to three months. Further, the cost of production per unit was far cheaper, allowing Sony to offer games about 40% lower cost to the user compared to ROM cartridges while still making the same amount of net revenue. In Japan, Sony published fewer copies of a wide variety of games for the PlayStation as a risk-limiting step, a model that had been used by Sony Music for CD audio discs. The production flexibility of CD-ROMs meant that Sony could produce larger volumes of popular games to get onto the market quickly, something that could not be done with cartridges due to their manufacturing lead time. The lower production costs of CD-ROMs also allowed publishers an additional source of profit: budget-priced reissues of games which had already recouped their development costs. Tokunaka remarked in 1996: Choosing CD-ROM is one of the most important decisions that we made. As I'm sure you understand, PlayStation could just as easily have worked with masked ROM [cartridges]. The 3D engine and everything—the whole PlayStation format—is independent of the media. But for various reasons (including the economies for the consumer, the ease of the manufacturing, inventory control for the trade, and also the software publishers) we deduced that CD-ROM would be the best media for PlayStation. The increasing complexity of developing games pushed cartridges to their storage limits and gradually discouraged some third-party developers. Part of the CD format's appeal to publishers was that they could be produced at a significantly lower cost and offered more production flexibility to meet demand. As a result, some third-party developers switched to the PlayStation, including Square and Enix, whose Final Fantasy VII and Dragon Quest VII respectively had been planned for the Nintendo 64 (both companies later merged to form Square Enix). Other developers released fewer games for the Nintendo 64 (Konami, releasing only thirteen N64 games but over fifty on the PlayStation). Nintendo 64 game releases were less frequent than the PlayStation's, with many being developed by either Nintendo themselves or second-parties such as Rare. The PlayStation Classic is a dedicated video game console made by Sony Interactive Entertainment that emulates PlayStation games. It was announced in September 2018 at the Tokyo Game Show, and released on 3 December 2018, the 24th anniversary of the release of the original console. As a dedicated console, the PlayStation Classic features 20 pre-installed games; the games run off the open source emulator PCSX. The console is bundled with two replica wired PlayStation controllers (those without analogue sticks), an HDMI cable, and a USB-Type A cable. Internally, the console uses a MediaTek MT8167a Quad A35 system on a chip with four central processing cores clocked at @ 1.5 GHz and a Power VR GE8300 graphics processing unit. It includes 16 GB of eMMC flash storage and 1 Gigabyte of DDR3 SDRAM. The PlayStation Classic is 45% smaller than the original console. The PlayStation Classic received negative reviews from critics and was compared unfavorably to Nintendo's rival Nintendo Entertainment System Classic Edition and Super Nintendo Entertainment System Classic Edition. Criticism was directed at its meagre game library, user interface, emulation quality, use of PAL versions for certain games, use of the original controller, and high retail price, though the console's design received praise. The console sold poorly. See also Notes References |
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Contents Middle East The Middle East[b] is a geopolitical region encompassing the Arabian Peninsula, Egypt, Iran, Iraq, the Levant, and Turkey. The term came into widespread usage by Western European nations in the early 20th century as a replacement of the term Near East (both were in contrast to the Far East). The term "Middle East" has led to some confusion over its changing definitions. Since the late 20th century, it has been criticized as being too Eurocentric. The region includes the vast majority of the territories included in the closely associated definition of West Asia, but without the South Caucasus. It also includes all of Egypt (not just the Sinai region) and all of Turkey (including East Thrace). Most Middle Eastern countries (13 out of 18) are part of the Arab world. The three most populous countries in the region are Egypt, Iran, and Turkey, while Saudi Arabia is the largest Middle Eastern country by area. The history of the Middle East dates back to ancient times, and it was long considered the "cradle of civilization". The geopolitical importance of the region has been recognized and competed for during millennia. The Abrahamic religions (Judaism, Christianity, and Islam) have their origins in the Middle East. Arabs constitute the main ethnic group in the region, followed by Turks, Persians, Kurds, Jews, and Assyrians. The Middle East generally has a hot, arid climate, especially in the Arabian and Egyptian regions. Several major rivers provide irrigation to support agriculture in limited areas here, such as the Nile Delta in Egypt, the Tigris and Euphrates watersheds of Mesopotamia, and the basin of the Jordan River that spans most of the Levant. These regions are collectively known as the Fertile Crescent, and comprise the core of what historians had long referred to as the cradle of civilization; multiple regions of the world have since been classified as also having developed independent, original civilizations. Conversely, the Levantine coast and most of Turkey have relatively temperate climates typical of the Mediterranean, with dry summers and cool, wet winters. Most of the countries that border the Persian Gulf have vast reserves of petroleum. Monarchs of the Arabian Peninsula in particular have benefitted economically from petroleum exports. Because of the arid climate and dependence on the fossil fuel industry, the Middle East is both a major contributor to climate change and a region that is expected to be severely adversely affected by it. Other concepts of the region exist, including the broader Middle East and North Africa (MENA), which includes states of the Maghreb and the Sudan. The term the "Greater Middle East" also includes Afghanistan, Mauritania, Pakistan, as well as parts of East Africa, and sometimes Central Asia and the South Caucasus. Terminology The term "Middle East" may have originated in the 1850s in the British India Office. However, it became more widely known when United States naval strategist Alfred Thayer Mahan used the term in 1902 to "designate the area between Arabia and India". During this time the British and Russian empires were vying for influence in Central Asia, a rivalry that would become known as the Great Game. Mahan realized not only the strategic importance of the region, but also of its center, the Persian Gulf. He labeled the area surrounding the Persian Gulf as the Middle East. He said that, beyond Egypt's Suez Canal, the Gulf was the most important passage for Britain to control in order to keep the Russians from advancing towards British India. Mahan first used the term in his article "The Persian Gulf and International Relations", published in September 1902 in the National Review, a British journal. The Middle East, if I may adopt a term which I have not seen, will some day need its Malta, as well as its Gibraltar; it does not follow that either will be in the Persian Gulf. Naval force has the quality of mobility which carries with it the privilege of temporary absences; but it needs to find on every scene of operation established bases of refit, of supply, and in case of disaster, of security. The British Navy should have the facility to concentrate in force if occasion arise, about Aden, India, and the Persian Gulf. Mahan's article was reprinted in The Times and followed in October by a 20-article series entitled "The Middle Eastern Question", written by Sir Ignatius Valentine Chirol. During this series, Sir Ignatius expanded the definition of Middle East to include "those regions of Asia which extend to the borders of India or command the approaches to India." After the series ended in 1903, The Times removed quotation marks from subsequent uses of the term. Until World War II, it was customary to refer to areas centered on Turkey and the eastern shore of the Mediterranean as the "Near East", while the "Far East" centered on China, India and Japan. The Middle East was then defined as the area from Mesopotamia to Burma; namely, the area between the Near East and the Far East. This area broadly corresponds to South Asia. In the late 1930s, the British established the Middle East Command, which was based in Cairo, for its military forces in the region. After that time, the term "Middle East" gained broader usage in Europe and the United States. Following World War II, for example, the Middle East Institute was founded in Washington, D.C. in 1946. The corresponding adjective is Middle Eastern and the derived noun is Middle Easterner. While non-Eurocentric terms such as "Southwest Asia" or "Swasia" have been sparsely used, the classification of the African country, Egypt, among those counted in the Middle East challenges the usefulness of using such terms. The description Middle has also led to some confusion over changing definitions. Before the First World War, "Near East" was used in English to refer to the Balkans and the Ottoman Empire, while "Middle East" referred to the Caucasus, Persia, and Arabian lands, and sometimes Afghanistan, India and others. In contrast, "Far East" referred to the countries of East Asia (e.g. China, Japan, and Korea). With the collapse of the Ottoman Empire in 1918, "Near East" largely fell out of common use in English, while "Middle East" came to be applied to the emerging independent countries of the Islamic world. However, the usage "Near East" was retained by a variety of academic disciplines, including archaeology and ancient history. In their usage, the term describes an area identical to the term Middle East, which is not used by these disciplines (see ancient Near East).[citation needed] The first official use of the term "Middle East" by the United States government was in the 1957 Eisenhower Doctrine, which pertained to the Suez Crisis. Secretary of State John Foster Dulles defined the Middle East as "the area lying between and including Libya on the west and Pakistan on the east, Syria and Iraq on the North and the Arabian peninsula to the south, plus the Sudan and Ethiopia." In 1958, the State Department explained that the terms "Near East" and "Middle East" were interchangeable, and defined the region as including only Egypt, Syria, Israel, Lebanon, Jordan, Iraq, Saudi Arabia, Kuwait, Bahrain, and Qatar. Since the late 20th century, scholars and journalists from the region, such as journalist Louay Khraish and historian Hassan Hanafi have criticized the use of "Middle East" as a Eurocentric and colonialist term. The Associated Press Stylebook of 2004 says that Near East formerly referred to the farther west countries while Middle East referred to the eastern ones, but that now they are synonymous. It instructs: Use Middle East unless Near East is used by a source in a story. Mideast is also acceptable, but Middle East is preferred. European languages have adopted terms similar to Near East and Middle East. Since these are based on a relative description, the meanings depend on the country and are generally different from the English terms. In German the term Naher Osten (Near East) is still in common use (nowadays the term Mittlerer Osten is more and more common in press texts translated from English sources, albeit having a distinct meaning). In the four Slavic languages, Russian Ближний Восток or Blizhniy Vostok, Bulgarian Близкия Изток, Polish Bliski Wschód or Croatian Bliski istok (terms meaning Near East are the only appropriate ones for the region). However, some European languages do have "Middle East" equivalents, such as French Moyen-Orient, Swedish Mellanöstern, Spanish Oriente Medio or Medio Oriente, Greek is Μέση Ανατολή (Mesi Anatoli), and Italian Medio Oriente.[c] Perhaps because of the political influence of the United States and Europe, and the prominence of Western press, the Arabic equivalent of Middle East (Arabic: الشرق الأوسط ash-Sharq al-Awsaṭ) has become standard usage in the mainstream Arabic press. It comprises the same meaning as the term "Middle East" in North American and Western European usage. The designation, Mashriq, also from the Arabic root for East, also denotes a variously defined region around the Levant, the eastern part of the Arabic-speaking world (as opposed to the Maghreb, the western part). Even though the term originated in the West, countries of the Middle East that use languages other than Arabic also use that term in translation. For instance, the Persian equivalent for Middle East is خاورمیانه (Khāvar-e miyāneh), the Hebrew is המזרח התיכון (hamizrach hatikhon), and the Turkish is Orta Doğu. Countries and territory Traditionally included within the Middle East are Arabia, Asia Minor, East Thrace, Egypt, Iran, the Levant, Mesopotamia, and the Socotra Archipelago. The region includes 17 UN-recognized countries and one British Overseas Territory. Various concepts are often paralleled to the Middle East, most notably the Near East, Fertile Crescent, and Levant. These are geographical concepts, which refer to large sections of the modern-day Middle East, with the Near East being the closest to the Middle East in its geographical meaning. Due to it primarily being Arabic speaking, the Maghreb region of North Africa is sometimes included. "Greater Middle East" is a political term coined by the second Bush administration in the first decade of the 21st century to denote various countries, pertaining to the Muslim world, specifically Afghanistan, Iran, Pakistan, and Turkey. Various Central Asian countries are sometimes also included. History The Middle East lies at the juncture of Africa and Eurasia and of the Indian Ocean and the Mediterranean Sea (see also: Indo-Mediterranean). It is the birthplace and spiritual center of religions such as Christianity, Islam, Judaism, Manichaeism, Yezidi, Druze, Yarsan, and Mandeanism, and in Iran, Mithraism, Zoroastrianism, Manicheanism, and the Baháʼí Faith. Throughout its history the Middle East has been a major center of world affairs; a strategically, economically, politically, culturally, and religiously sensitive area. The region is one of the regions where agriculture was independently discovered, and from the Middle East it was spread, during the Neolithic, to different regions of the world such as Europe, the Indus Valley and Eastern Africa. Prior to the formation of civilizations, advanced cultures formed all over the Middle East during the Stone Age. The search for agricultural lands by agriculturalists, and pastoral lands by herdsmen meant different migrations took place within the region and shaped its ethnic and demographic makeup. The Middle East is widely and most famously known as the cradle of civilization. The world's earliest civilizations, Mesopotamia (Sumer, Akkad, Assyria and Babylonia), ancient Egypt and Kish in the Levant, all originated in the Fertile Crescent and Nile Valley regions of the ancient Near East. These were followed by the Hittite, Greek, Hurrian and Urartian civilisations of Asia Minor; Elam, Persia and Median civilizations in Iran, as well as the civilizations of the Levant (such as Ebla, Mari, Nagar, Ugarit, Canaan, Aramea, Mitanni, Phoenicia and Israel) and the Arabian Peninsula (Magan, Sheba, Ubar). The Near East was first largely unified under the Neo Assyrian Empire, then the Achaemenid Empire followed later by the Macedonian Empire and after this to some degree by the Iranian empires (namely the Parthian and Sassanid Empires), the Roman Empire and Byzantine Empire. The region served as the intellectual and economic center of the Roman Empire and played an exceptionally important role due to its periphery on the Sassanid Empire. Thus, the Romans stationed up to five or six of their legions in the region for the sole purpose of defending it from Sassanid and Bedouin raids and invasions. From the 4th century CE onwards, the Middle East became the center of the two main powers at the time, the Byzantine Empire and the Sassanid Empire. However, it would be the later Islamic Caliphates of the Middle Ages, or Islamic Golden Age which began with the Islamic conquest of the region in the 7th century AD, that would first unify the entire Middle East as a distinct region and create the dominant Islamic Arab ethnic identity that largely (but not exclusively) persists today. The 4 caliphates that dominated the Middle East for more than 600 years were the Rashidun Caliphate, the Umayyad caliphate, the Abbasid caliphate and the Fatimid caliphate. Additionally, the Mongols would come to dominate the region, the Kingdom of Armenia would incorporate parts of the region to their domain, the Seljuks would rule the region and spread Turko-Persian culture, and the Franks would found the Crusader states that would stand for roughly two centuries. Josiah Russell estimates the population of what he calls "Islamic territory" as roughly 12.5 million in 1000 – Anatolia 8 million, Syria 2 million, and Egypt 1.5 million. From the 16th century onward, the Middle East came to be dominated, once again, by two main powers: the Ottoman Empire and the Safavid dynasty. The modern Middle East began after World War I, when the Ottoman Empire, which was allied with the Central Powers, was defeated by the Allies and partitioned into a number of separate nations, initially under British and French Mandates. Other defining events in this transformation included the establishment of Israel in 1948 and the eventual departure of European powers, notably Britain and France by the end of the 1960s. They were supplanted in some part by the rising influence of the United States from the 1970s onwards. In the 20th century, the region's significant stocks of crude oil gave it new strategic and economic importance. Mass production of oil began around 1945, with Saudi Arabia, Iran, Kuwait, Iraq, and the United Arab Emirates having large quantities of oil. Estimated oil reserves, especially in Saudi Arabia and Iran, are some of the highest in the world, and the international oil cartel OPEC is dominated by Middle Eastern countries. During the Cold War, the Middle East was a theater of ideological struggle between the two superpowers and their allies: NATO and the United States on one side, and the Soviet Union and Warsaw Pact on the other, as they competed to influence regional allies. Besides the political reasons there was also the "ideological conflict" between the two systems. Moreover, as Louise Fawcett argues, among many important areas of contention, or perhaps more accurately of anxiety, were, first, the desires of the superpowers to gain strategic advantage in the region, second, the fact that the region contained some two-thirds of the world's oil reserves in a context where oil was becoming increasingly vital to the economy of the Western world [...] Within this contextual framework, the United States sought to divert the Arab world from Soviet influence. Throughout the 20th and 21st centuries, the region has experienced both periods of relative peace and tolerance and periods of conflict particularly between Sunnis and Shiites. Geography In 2018, the MENA region emitted 3.2 billion tonnes of carbon dioxide and produced 8.7% of global greenhouse gas emissions (GHG) despite making up only 6% of the global population. These emissions are mostly from the energy sector, an integral component of many Middle Eastern and North African economies due to the extensive oil and natural gas reserves that are found within the region. The Middle East region is one of the most vulnerable to climate change. The impacts include increase in drought conditions, aridity, heatwaves and sea level rise. Sharp global temperature and sea level changes, shifting precipitation patterns and increased frequency of extreme weather events are some of the main impacts of climate change as identified by the Intergovernmental Panel on Climate Change (IPCC). The MENA region is especially vulnerable to such impacts due to its arid and semi-arid environment, facing climatic challenges such as low rainfall, high temperatures and dry soil. The climatic conditions that foster such challenges for MENA are projected by the IPCC to worsen throughout the 21st century. If greenhouse gas emissions are not significantly reduced, part of the MENA region risks becoming uninhabitable before the year 2100. Climate change is expected to put significant strain on already scarce water and agricultural resources within the MENA region, threatening the national security and political stability of all included countries. Over 60 percent of the region's population lives in high and very high water-stressed areas compared to the global average of 35 percent. This has prompted some MENA countries to engage with the issue of climate change on an international level through environmental accords such as the Paris Agreement. Law and policy are also being established on a national level amongst MENA countries, with a focus on the development of renewable energies. Economy Middle Eastern economies range from being very poor (such as Gaza and Yemen) to extremely wealthy nations (such as Qatar and UAE). According to the International Monetary Fund, the three largest Middle Eastern economies in nominal GDP in 2023 were Saudi Arabia ($1.06 trillion), Turkey ($1.03 trillion), and Israel ($0.54 trillion). For nominal GDP per person, the highest ranking countries are Qatar ($83,891), Israel ($55,535), the United Arab Emirates ($49,451) and Cyprus ($33,807). Turkey ($3.6 trillion), Saudi Arabia ($2.3 trillion), and Iran ($1.7 trillion) had the largest economies in terms of GDP PPP. For GDP PPP per person, the highest-ranking countries are Qatar ($124,834), the United Arab Emirates ($88,221), Saudi Arabia ($64,836), Bahrain ($60,596) and Israel ($54,997). The lowest-ranking country in the Middle East, in terms of GDP nominal per capita, is Yemen ($573). The economic structure of Middle Eastern nations are different because while some are heavily dependent on export of only oil and oil-related products (Saudi Arabia, the UAE and Kuwait), others have a highly diverse economic base (such as Cyprus, Israel, Turkey and Egypt). Industries of the Middle Eastern region include oil and oil-related products, agriculture, cotton, cattle, dairy, textiles, leather products, surgical instruments, defence equipment (guns, ammunition, tanks, submarines, fighter jets, UAVs, and missiles). Banking is an important sector, especially for UAE and Bahrain. With the exception of Cyprus, Turkey, Egypt, Lebanon and Israel, tourism has been a relatively undeveloped area of the economy, in part because of the socially conservative nature of the region as well as political turmoil in certain regions. Since the end of the COVID pandemic however, countries such as the UAE, Bahrain, and Jordan have begun attracting greater numbers of tourists because of improving tourist facilities and the relaxing of tourism-related restrictive policies. Unemployment is high in the Middle East and North Africa region, particularly among people aged 15–29, a demographic representing 30% of the region's population. The total regional unemployment rate in 2025 is 10.8%, and among youth is as high as 28%. Demographics Arabs constitute the largest ethnic group in the Middle East, followed by various Iranian peoples and then by Turkic peoples (Turkish, Azeris, Syrian Turkmen, and Iraqi Turkmen). Native ethnic groups of the region include, in addition to Arabs, Arameans, Assyrians, Baloch, Berbers, Copts, Druze, Greek Cypriots, Jews, Kurds, Lurs, Mandaeans, Persians, Samaritans, Shabaks, Tats, and Zazas. European ethnic groups that form a diaspora in the region include Albanians, Bosniaks, Circassians (including Kabardians), Crimean Tatars, Greeks, Franco-Levantines, Italo-Levantines, and Iraqi Turkmens. Among other migrant populations are Chinese, Filipinos, Indians, Indonesians, Pakistanis, Pashtuns, Romani, and Afro-Arabs. "Migration has always provided an important vent for labor market pressures in the Middle East. For the period between the 1970s and 1990s, the Arab states of the Persian Gulf in particular provided a rich source of employment for workers from Egypt, Yemen and the countries of the Levant, while Europe had attracted young workers from North African countries due both to proximity and the legacy of colonial ties between France and the majority of North African states." According to the International Organization for Migration, there are 13 million first-generation migrants from Arab nations in the world, of which 5.8 reside in other Arab countries. Expatriates from Arab countries contribute to the circulation of financial and human capital in the region and thus significantly promote regional development. In 2009 Arab countries received a total of US$35.1 billion in remittance in-flows and remittances sent to Jordan, Egypt and Lebanon from other Arab countries are 40 to 190 per cent higher than trade revenues between these and other Arab countries. In Somalia, the Somali Civil War has greatly increased the size of the Somali diaspora, as many of the best educated Somalis left for Middle Eastern countries as well as Europe and North America. Non-Arab Middle Eastern countries such as Turkey, Israel and Iran are also subject to important migration dynamics. A fair proportion of those migrating from Arab nations are from ethnic and religious minorities facing persecution and are not necessarily ethnic Arabs, Iranians or Turks.[citation needed] Large numbers of Kurds, Jews, Assyrians, Greeks and Armenians as well as many Mandeans have left nations such as Iraq, Iran, Syria and Turkey for these reasons during the last century. In Iran, many religious minorities such as Christians, Baháʼís, Jews and Zoroastrians have left since the Islamic Revolution of 1979. The Middle East is very diverse when it comes to religions, many of which originated there. Islam is the largest religion in the Middle East, but other faiths that originated there, such as Judaism and Christianity, are also well represented. Christian communities have played a vital role in the Middle East, and they represent 78% of Cyprus population, and 40.5% of Lebanon, where the Lebanese president, half of the cabinet, and half of the parliament follow one of the various Lebanese Christian rites. There are also important minority religions like the Baháʼí Faith, Yarsanism, Yazidism, Zoroastrianism, Mandaeism, Druze, and Shabakism, and in ancient times the region was home to Mesopotamian religions, Canaanite religions, Manichaeism, Mithraism and various monotheist gnostic sects. The six top languages, in terms of numbers of speakers, are Arabic, Persian, Turkish, Kurdish, Modern Hebrew and Greek. About 20 minority languages are also spoken in the Middle East. Arabic, with all its dialects, is the most widely spoken language in the Middle East, with Literary Arabic being official in all North African and in most West Asian countries. Arabic dialects are also spoken in some adjacent areas in neighbouring Middle Eastern non-Arab countries. It is a member of the Semitic branch of the Afro-Asiatic languages. Several Modern South Arabian languages such as Mehri and Soqotri are also spoken in Yemen and Oman. Another Semitic language is Aramaic and its dialects are spoken mainly by Assyrians and Mandaeans, with Western Aramaic still spoken in two villages near Damascus, Syria. There is also an Oasis Berber-speaking community in Egypt where the language is also known as Siwa. It is a non-Semitic Afro-Asiatic sister language. Persian is the second most spoken language. While it is primarily spoken in Iran and some border areas in neighbouring countries, the country is one of the region's largest and most populous. It belongs to the Indo-Iranian branch of the family of Indo-European languages. Other Western Iranic languages spoken in the region include Achomi, Daylami, Kurdish dialects, Semmani, Lurish, amongst many others. The close third-most widely spoken language, Turkish, is largely confined to Turkey, which is also one of the region's largest and most populous countries, but it is present in areas in neighboring countries. It is a member of the Turkic languages, which have their origins in East Asia. Another Turkic language, Azerbaijani, is spoken by Azerbaijanis in Iran. The fourth-most widely spoken language, Kurdish, is spoken in the countries of Iran, Iraq, Syria and Turkey, Sorani Kurdish is the second official language in Iraq (instated after the 2005 constitution) after Arabic. Hebrew is the official language of Israel, with Arabic given a special status after the 2018 Basic law lowered its status from an official language prior to 2018. Hebrew is spoken and used by over 80% of Israel's population, the other 20% using Arabic. Modern Hebrew only began being spoken in the 20th century after being revived in the late 19th century by Elizer Ben-Yehuda (Elizer Perlman) and European Jewish settlers, with the first native Hebrew speaker being born in 1882. Greek is one of the two official languages of Cyprus, and the country's main language. Small communities of Greek speakers exist all around the Middle East; until the 20th century it was also widely spoken in Asia Minor (being the second most spoken language there, after Turkish) and Egypt. During the antiquity, Ancient Greek was the lingua franca for many areas of the western Middle East and until the Muslim expansion it was widely spoken there as well. Until the late 11th century, it was also the main spoken language in Asia Minor; after that it was gradually replaced by the Turkish language as the Anatolian Turks expanded and the local Greeks were assimilated, especially in the interior. English is one of the official languages of Akrotiri and Dhekelia. It is also commonly taught and used as a foreign second language, in countries such as Egypt, Jordan, Iran, Iraq, Qatar, Bahrain, United Arab Emirates and Kuwait. It is also a main language in some Emirates of the United Arab Emirates. It is also spoken as native language by Jewish immigrants from Anglophone countries (UK, US, Australia) in Israel and understood widely as second language there. French is taught and used in many government facilities and media in Lebanon, and is taught in some primary and secondary schools of Egypt and Syria. Maltese, a Semitic language mainly spoken in Europe, is used by the Franco-Maltese diaspora in Egypt. Due to widespread immigration of French Jews to Israel, it is the native language of approximately 200,000 Jews in Israel. Armenian speakers are to be found in the region. Georgian is spoken by the Georgian diaspora. Russian is spoken by a large portion of the Israeli population, because of emigration in the late 1990s. Russian today is a popular unofficial language in use in Israel; news, radio and sign boards can be found in Russian around the country after Hebrew and Arabic. Circassian is also spoken by the diaspora in the region and by almost all Circassians in Israel who speak Hebrew and English as well. The largest Romanian-speaking community in the Middle East is found in Israel, where as of 1995[update] Romanian is spoken by 5% of the population.[d] Bengali, Hindi and Urdu are widely spoken by migrant communities in many Middle Eastern countries, such as Saudi Arabia (where 20–25% of the population is South Asian), the United Arab Emirates (where 50–55% of the population is South Asian), and Qatar, which have large numbers of Pakistani, Bangladeshi and Indian immigrants. Culture The Middle East has recently become more prominent in hosting global sport events due to its wealth and desire to diversify its economy. The South Asian diaspora is a major backer of cricket in the region. See also Notes References Further reading External links 29°N 41°E / 29°N 41°E / 29; 41 |
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Contents OpenAI OpenAI is an American artificial intelligence research organization comprising both a non-profit foundation and a controlled for-profit public benefit corporation (PBC), headquartered in San Francisco. It aims to develop "safe and beneficial" artificial general intelligence (AGI), which it defines as "highly autonomous systems that outperform humans at most economically valuable work". OpenAI is widely recognized for its development of the GPT family of large language models, the DALL-E series of text-to-image models, and the Sora series of text-to-video models, which have influenced industry research and commercial applications. Its release of ChatGPT in November 2022 has been credited with catalyzing widespread interest in generative AI. The organization was founded in 2015 in Delaware but evolved a complex corporate structure. As of October 2025, following restructuring approved by California and Delaware regulators, the non-profit OpenAI Foundation holds 26% of the for-profit OpenAI Group PBC, with Microsoft holding 27% and employees/other investors holding 47%. Under its governance arrangements, the OpenAI Foundation holds the authority to appoint the board of the for-profit OpenAI Group PBC, a mechanism designed to align the entity’s strategic direction with the Foundation’s charter. Microsoft previously invested over $13 billion into OpenAI, and provides Azure cloud computing resources. In October 2025, OpenAI conducted a $6.6 billion share sale that valued the company at $500 billion. In 2023 and 2024, OpenAI faced multiple lawsuits for alleged copyright infringement against authors and media companies whose work was used to train some of OpenAI's products. In November 2023, OpenAI's board removed Sam Altman as CEO, citing a lack of confidence in him, but reinstated him five days later following a reconstruction of the board. Throughout 2024, roughly half of then-employed AI safety researchers left OpenAI, citing the company's prominent role in an industry-wide problem. Founding In December 2015, OpenAI was founded as a not for profit organization by Sam Altman, Elon Musk, Ilya Sutskever, Greg Brockman, Trevor Blackwell, Vicki Cheung, Andrej Karpathy, Durk Kingma, John Schulman, Pamela Vagata, and Wojciech Zaremba, with Sam Altman and Elon Musk as the co-chairs. A total of $1 billion in capital was pledged by Sam Altman, Greg Brockman, Elon Musk, Reid Hoffman, Jessica Livingston, Peter Thiel, Amazon Web Services (AWS), and Infosys. However, the actual capital collected significantly lagged pledges. According to company disclosures, only $130 million had been received by 2019. In its founding charter, OpenAI stated an intention to collaborate openly with other institutions by making certain patents and research publicly available, but later restricted access to its most capable models, citing competitive and safety concerns. OpenAI was initially run from Brockman's living room. It was later headquartered at the Pioneer Building in the Mission District, San Francisco. According to OpenAI's charter, its founding mission is "to ensure that artificial general intelligence (AGI)—by which we mean highly autonomous systems that outperform humans at most economically valuable work—benefits all of humanity." Musk and Altman stated in 2015 that they were partly motivated by concerns about AI safety and existential risk from artificial general intelligence. OpenAI stated that "it's hard to fathom how much human-level AI could benefit society", and that it is equally difficult to comprehend "how much it could damage society if built or used incorrectly". The startup also wrote that AI "should be an extension of individual human wills and, in the spirit of liberty, as broadly and evenly distributed as possible", and that "because of AI's surprising history, it's hard to predict when human-level AI might come within reach. When it does, it'll be important to have a leading research institution which can prioritize a good outcome for all over its own self-interest." Co-chair Sam Altman expected a decades-long project that eventually surpasses human intelligence. Brockman met with Yoshua Bengio, one of the "founding fathers" of deep learning, and drew up a list of great AI researchers. Brockman was able to hire nine of them as the first employees in December 2015. OpenAI did not pay AI researchers salaries comparable to those of Facebook or Google. It also did not pay stock options which AI researchers typically get. Nevertheless, OpenAI spent $7 million on its first 52 employees in 2016. OpenAI's potential and mission drew these researchers to the firm; a Google employee said he was willing to leave Google for OpenAI "partly because of the very strong group of people and, to a very large extent, because of its mission." OpenAI co-founder Wojciech Zaremba stated that he turned down "borderline crazy" offers of two to three times his market value to join OpenAI instead. In April 2016, OpenAI released a public beta of "OpenAI Gym", its platform for reinforcement learning research. Nvidia gifted its first DGX-1 supercomputer to OpenAI in August 2016 to help it train larger and more complex AI models with the capability of reducing processing time from six days to two hours. In December 2016, OpenAI released "Universe", a software platform for measuring and training an AI's general intelligence across the world's supply of games, websites, and other applications. Corporate structure In 2019, OpenAI transitioned from non-profit to "capped" for-profit, with the profit being capped at 100 times any investment. According to OpenAI, the capped-profit model allows OpenAI Global, LLC to legally attract investment from venture funds and, in addition, to grant employees stakes in the company. Many top researchers work for Google Brain, DeepMind, or Facebook, which offer equity that a nonprofit would be unable to match. Before the transition, OpenAI was legally required to publicly disclose the compensation of its top employees. The company then distributed equity to its employees and partnered with Microsoft, announcing an investment package of $1 billion into the company. Since then, OpenAI systems have run on an Azure-based supercomputing platform from Microsoft. OpenAI Global, LLC then announced its intention to commercially license its technologies. It planned to spend $1 billion "within five years, and possibly much faster". Altman stated that even a billion dollars may turn out to be insufficient, and that the lab may ultimately need "more capital than any non-profit has ever raised" to achieve artificial general intelligence. The nonprofit, OpenAI, Inc., is the sole controlling shareholder of OpenAI Global, LLC, which, despite being a for-profit company, retains a formal fiduciary responsibility to OpenAI, Inc.'s nonprofit charter. A majority of OpenAI, Inc.'s board is barred from having financial stakes in OpenAI Global, LLC. In addition, minority members with a stake in OpenAI Global, LLC are barred from certain votes due to conflict of interest. Some researchers have argued that OpenAI Global, LLC's switch to for-profit status is inconsistent with OpenAI's claims to be "democratizing" AI. On February 29, 2024, Elon Musk filed a lawsuit against OpenAI and CEO Sam Altman, accusing them of shifting focus from public benefit to profit maximization—a case OpenAI dismissed as "incoherent" and "frivolous," though Musk later revived legal action against Altman and others in August. On April 9, 2024, OpenAI countersued Musk in federal court, alleging that he had engaged in "bad-faith tactics" to slow the company's progress and seize its innovations for his personal benefit. OpenAI also argued that Musk had previously supported the creation of a for-profit structure and had expressed interest in controlling OpenAI himself. The countersuit seeks damages and legal measures to prevent further alleged interference. On February 10, 2025, a consortium of investors led by Elon Musk submitted a $97.4 billion unsolicited bid to buy the nonprofit that controls OpenAI, declaring willingness to match or exceed any better offer. The offer was rejected on 14 February 2025, with OpenAI stating that it was not for sale, but the offer complicated Altman's restructuring plan by suggesting a lower bar for how much the nonprofit should be valued. OpenAI, Inc. was originally designed as a nonprofit in order to ensure that AGI "benefits all of humanity" rather than "the private gain of any person". In 2019, it created OpenAI Global, LLC, a capped-profit subsidiary controlled by the nonprofit. In December 2024, OpenAI proposed a restructuring plan to convert the capped-profit into a Delaware-based public benefit corporation (PBC), and to release it from the control of the nonprofit. The nonprofit would sell its control and other assets, getting equity in return, and would use it to fund and pursue separate charitable projects, including in science and education. OpenAI's leadership described the change as necessary to secure additional investments, and claimed that the nonprofit's founding mission to ensure AGI "benefits all of humanity" would be better fulfilled. The plan has been criticized by former employees. A legal letter named "Not For Private Gain" asked the attorneys general of California and Delaware to intervene, stating that the restructuring is illegal and would remove governance safeguards from the nonprofit and the attorneys general. The letter argues that OpenAI's complex structure was deliberately designed to remain accountable to its mission, without the conflicting pressure of maximizing profits. It contends that the nonprofit is best positioned to advance its mission of ensuring AGI benefits all of humanity by continuing to control OpenAI Global, LLC, whatever the amount of equity that it could get in exchange. PBCs can choose how they balance their mission with profit-making. Controlling shareholders have a large influence on how closely a PBC sticks to its mission. On October 28, 2025, OpenAI announced that it had adopted the new PBC corporate structure after receiving approval from the attorneys general of California and Delaware. Under the new structure, OpenAI's for-profit branch became a public benefit corporation known as OpenAI Group PBC, while the non-profit was renamed to the OpenAI Foundation. The OpenAI Foundation holds a 26% stake in the PBC, while Microsoft holds a 27% stake and the remaining 47% is owned by employees and other investors. All members of the OpenAI Group PBC board of directors will be appointed by the OpenAI Foundation, which can remove them at any time. Members of the Foundation's board will also serve on the for-profit board. The new structure allows the for-profit PBC to raise investor funds like most traditional tech companies, including through an initial public offering, which Altman claimed was the most likely path forward. In January 2023, OpenAI Global, LLC was in talks for funding that would value the company at $29 billion, double its 2021 value. On January 23, 2023, Microsoft announced a new US$10 billion investment in OpenAI Global, LLC over multiple years, partially needed to use Microsoft's cloud-computing service Azure. From September to December, 2023, Microsoft rebranded all variants of its Copilot to Microsoft Copilot, and they added MS-Copilot to many installations of Windows and released Microsoft Copilot mobile apps. Following OpenAI's 2025 restructuring, Microsoft owns a 27% stake in the for-profit OpenAI Group PBC, valued at $135 billion. In a deal announced the same day, OpenAI agreed to purchase $250 billion of Azure services, with Microsoft ceding their right of first refusal over OpenAI's future cloud computing purchases. As part of the deal, OpenAI will continue to share 20% of its revenue with Microsoft until it achieves AGI, which must now be verified by an independent panel of experts. The deal also loosened restrictions on both companies working with third parties, allowing Microsoft to pursue AGI independently and allowing OpenAI to develop products with other companies. In 2017, OpenAI spent $7.9 million, a quarter of its functional expenses, on cloud computing alone. In comparison, DeepMind's total expenses in 2017 were $442 million. In the summer of 2018, training OpenAI's Dota 2 bots required renting 128,000 CPUs and 256 GPUs from Google for multiple weeks. In October 2024, OpenAI completed a $6.6 billion capital raise with a $157 billion valuation including investments from Microsoft, Nvidia, and SoftBank. On January 21, 2025, Donald Trump announced The Stargate Project, a joint venture between OpenAI, Oracle, SoftBank and MGX to build an AI infrastructure system in conjunction with the US government. The project takes its name from OpenAI's existing "Stargate" supercomputer project and is estimated to cost $500 billion. The partners planned to fund the project over the next four years. In July, the United States Department of Defense announced that OpenAI had received a $200 million contract for AI in the military, along with Anthropic, Google, and xAI. In the same month, the company made a deal with the UK Government to use ChatGPT and other AI tools in public services. OpenAI subsequently began a $50 million fund to support nonprofit and community organizations. In April 2025, OpenAI raised $40 billion at a $300 billion post-money valuation, which was the highest-value private technology deal in history. The financing round was led by SoftBank, with other participants including Microsoft, Coatue, Altimeter and Thrive. In July 2025, the company reported annualized revenue of $12 billion. This was an increase from $3.7 billion in 2024, which was driven by ChatGPT subscriptions, which reached 20 million paid subscribers by April 2025, up from 15.5 million at the end of 2024, alongside a rapidly expanding enterprise customer base that grew to five million business users. The company’s cash burn remains high because of the intensive computational costs required to train and operate large language models. It projects an $8 billion operating loss in 2025. OpenAI reports revised long-term spending projections totaling approximately $115 billion through 2029, with annual expenditures projected to escalate significantly, reaching $17 billion in 2026, $35 billion in 2027, and $45 billion in 2028. These expenditures are primarily allocated toward expanding compute infrastructure, developing proprietary AI chips, constructing data centers, and funding intensive model training programs, with more than half of the spending through the end of the decade expected to support research-intensive compute for model training and development. The company's financial strategy prioritizes market expansion and technological advancement over near-term profitability, with OpenAI targeting cash-flow-positive operations by 2029 and projecting revenue of approximately $200 billion by 2030. This aggressive spending trajectory underscores both the enormous capital requirements of scaling cutting-edge AI technology and OpenAI's commitment to maintaining its position as a leader in the artificial intelligence industry. In October 2025, OpenAI completed an employee share sale of up to $10 billion to existing investors which valued the company at $500 billion. The deal values OpenAI as the most valuable privately owned company in the world—surpassing SpaceX as the world's most valuable private company. On November 17, 2023, Sam Altman was removed as CEO when its board of directors (composed of Helen Toner, Ilya Sutskever, Adam D'Angelo and Tasha McCauley) cited a lack of confidence in him. Chief Technology Officer Mira Murati took over as interim CEO. Greg Brockman, the president of OpenAI, was also removed as chairman of the board and resigned from the company's presidency shortly thereafter. Three senior OpenAI researchers subsequently resigned: director of research and GPT-4 lead Jakub Pachocki, head of AI risk Aleksander Mądry, and researcher Szymon Sidor. On November 18, 2023, there were reportedly talks of Altman returning as CEO amid pressure placed upon the board by investors such as Microsoft and Thrive Capital, who objected to Altman's departure. Although Altman himself spoke in favor of returning to OpenAI, he has since stated that he considered starting a new company and bringing former OpenAI employees with him if talks to reinstate him didn't work out. The board members agreed "in principle" to resign if Altman returned. On November 19, 2023, negotiations with Altman to return failed and Murati was replaced by Emmett Shear as interim CEO. The board initially contacted Anthropic CEO Dario Amodei (a former OpenAI executive) about replacing Altman, and proposed a merger of the two companies, but both offers were declined. On November 20, 2023, Microsoft CEO Satya Nadella announced Altman and Brockman would be joining Microsoft to lead a new advanced AI research team, but added that they were still committed to OpenAI despite recent events. Before the partnership with Microsoft was finalized, Altman gave the board another opportunity to negotiate with him. About 738 of OpenAI's 770 employees, including Murati and Sutskever, signed an open letter stating they would quit their jobs and join Microsoft if the board did not rehire Altman and then resign. This prompted OpenAI investors to consider legal action against the board as well. In response, OpenAI management sent an internal memo to employees stating that negotiations with Altman and the board had resumed and would take some time. On November 21, 2023, after continued negotiations, Altman and Brockman returned to the company in their prior roles along with a reconstructed board made up of new members Bret Taylor (as chairman) and Lawrence Summers, with D'Angelo remaining. According to subsequent reporting, shortly before Altman’s firing, some employees raised concerns to the board about how he had handled the safety implications of a recent internal AI capability discovery. On November 29, 2023, OpenAI announced that an anonymous Microsoft employee had joined the board as a non-voting member to observe the company's operations; Microsoft resigned from the board in July 2024. In February 2024, the Securities and Exchange Commission subpoenaed OpenAI's internal communication to determine if Altman's alleged lack of candor misled investors. In 2024, following the temporary removal of Sam Altman and his return, many employees gradually left OpenAI, including most of the original leadership team and a significant number of AI safety researchers. In August 2023, it was announced that OpenAI had acquired the New York-based start-up Global Illumination, a company that deploys AI to develop digital infrastructure and creative tools. In June 2024, OpenAI acquired Multi, a startup focused on remote collaboration. In March 2025, OpenAI reached a deal with CoreWeave to acquire $350 million worth of CoreWeave shares and access to AI infrastructure, in return for $11.9 billion paid over five years. Microsoft was already CoreWeave's biggest customer in 2024. Alongside their other business dealings, OpenAI and Microsoft were renegotiating the terms of their partnership to facilitate a potential future initial public offering by OpenAI, while ensuring Microsoft's continued access to advanced AI models. On May 21, OpenAI announced the $6.5 billion acquisition of io, an AI hardware start-up founded by former Apple designer Jony Ive in 2024. In September 2025, OpenAI agreed to acquire the product testing startup Statsig for $1.1 billion in an all-stock deal and appointed Statsig's founding CEO Vijaye Raji as OpenAI's chief technology officer of applications. The company also announced development of an AI-driven hiring service designed to rival LinkedIn. OpenAI acquired personal finance app Roi in October 2025. In October 2025, OpenAI acquired Software Applications Incorporated, the developer of Sky, a macOS-based natural language interface designed to operate across desktop applications. The Sky team joined OpenAI, and the company announced plans to integrate Sky’s capabilities into ChatGPT. In December 2025, it was announced OpenAI had agreed to acquire Neptune, an AI tooling startup that helps companies track and manage model training, for an undisclosed amount. In January 2026, it was announced OpenAI had acquired healthcare technology startup Torch for approximately $60 million. The acquisition followed the launch of OpenAI’s ChatGPT Health product and was intended to strengthen the company’s medical data and healthcare artificial intelligence capabilities. OpenAI has been criticized for outsourcing the annotation of data sets to Sama, a company based in San Francisco that employed workers in Kenya. These annotations were used to train an AI model to detect toxicity, which could then be used to moderate toxic content, notably from ChatGPT's training data and outputs. However, these pieces of text usually contained detailed descriptions of various types of violence, including sexual violence. The investigation uncovered that OpenAI began sending snippets of data to Sama as early as November 2021. The four Sama employees interviewed by Time described themselves as mentally scarred. OpenAI paid Sama $12.50 per hour of work, and Sama was redistributing the equivalent of between $1.32 and $2.00 per hour post-tax to its annotators. Sama's spokesperson said that the $12.50 was also covering other implicit costs, among which were infrastructure expenses, quality assurance and management. In 2024, OpenAI began collaborating with Broadcom to design a custom AI chip capable of both training and inference, targeted for mass production in 2026 and to be manufactured by TSMC on a 3 nm process node. This initiative intended to reduce OpenAI's dependence on Nvidia GPUs, which are costly and face high demand in the market. In January 2024, Arizona State University purchased ChatGPT Enterprise in OpenAI's first deal with a university. In June 2024, Apple Inc. signed a contract with OpenAI to integrate ChatGPT features into its products as part of its new Apple Intelligence initiative. In June 2025, OpenAI began renting Google Cloud's Tensor Processing Units (TPUs) to support ChatGPT and related services, marking its first meaningful use of non‑Nvidia AI chips. In September 2025, it was revealed that OpenAI signed a contract with Oracle to purchase $300 billion in computing power over the next five years. In September 2025, OpenAI and NVIDIA announced a memorandum of understanding that included a potential deployment of at least 10 gigawatts of NVIDIA systems and a $100 billion investment from NVIDIA in OpenAI. OpenAI expected the negotiations to be completed within weeks. As of January 2026, this has not been realized, and the two sides are rethinking the future of their partnership. In October 2025, OpenAI announced a multi-billion dollar deal with AMD. OpenAI committed to purchasing six gigawatts worth of AMD chips, starting with the MI450. OpenAI will have the option to buy up to 160 million shares of AMD, about 10% of the company, depending on development, performance and share price targets. In December 2025, Disney said it would make a $1 billion investment in OpenAI, and signed a three-year licensing deal that will let users generate videos using Sora—OpenAI's short-form AI video platform. More than 200 Disney, Marvel, Star Wars and Pixar characters will be available to OpenAI users. In early 2026, Amazon entered advanced discussions to invest up to $50 billion in OpenAI as part of a potential artificial intelligence partnership. Under the proposed agreement, OpenAI’s models could be integrated into Amazon’s digital assistant Alexa and other internal projects. OpenAI provides LLMs to the Artificial Intelligence Cyber Challenge and to the Advanced Research Projects Agency for Health. In October 2024, The Intercept revealed that OpenAI's tools are considered "essential" for AFRICOM's mission and included in an "Exception to Fair Opportunity" contractual agreement between the United States Department of Defense and Microsoft. In December 2024, OpenAI said it would partner with defense-tech company Anduril to build drone defense technologies for the United States and its allies. In 2025, OpenAI's Chief Product Officer, Kevin Weil, was commissioned lieutenant colonel in the U.S. Army to join Detachment 201 as senior advisor. In June 2025, the U.S. Department of Defense awarded OpenAI a $200 million one-year contract to develop AI tools for military and national security applications. OpenAI announced a new program, OpenAI for Government, to give federal, state, and local governments access to its models, including ChatGPT. Services In February 2019, GPT-2 was announced, which gained attention for its ability to generate human-like text. In 2020, OpenAI announced GPT-3, a language model trained on large internet datasets. GPT-3 is aimed at natural language answering questions, but it can also translate between languages and coherently generate improvised text. It also announced that an associated API, named the API, would form the heart of its first commercial product. Eleven employees left OpenAI, mostly between December 2020 and January 2021, in order to establish Anthropic. In 2021, OpenAI introduced DALL-E, a specialized deep learning model adept at generating complex digital images from textual descriptions, utilizing a variant of the GPT-3 architecture. In December 2022, OpenAI received widespread media coverage after launching a free preview of ChatGPT, its new AI chatbot based on GPT-3.5. According to OpenAI, the preview received over a million signups within the first five days. According to anonymous sources cited by Reuters in December 2022, OpenAI Global, LLC was projecting $200 million of revenue in 2023 and $1 billion in revenue in 2024. After ChatGPT was launched, Google announced a similar chatbot, Bard, amid internal concerns that ChatGPT could threaten Google’s position as a primary source of online information. On February 7, 2023, Microsoft announced that it was building AI technology based on the same foundation as ChatGPT into Microsoft Bing, Edge, Microsoft 365 and other products. On March 14, 2023, OpenAI released GPT-4, both as an API (with a waitlist) and as a feature of ChatGPT Plus. On November 6, 2023, OpenAI launched GPTs, allowing individuals to create customized versions of ChatGPT for specific purposes, further expanding the possibilities of AI applications across various industries. On November 14, 2023, OpenAI announced they temporarily suspended new sign-ups for ChatGPT Plus due to high demand. Access for newer subscribers re-opened a month later on December 13. In December 2024, the company launched the Sora model. It also launched OpenAI o1, an early reasoning model that was internally codenamed strawberry. Additionally, ChatGPT Pro—a $200/month subscription service offering unlimited o1 access and enhanced voice features—was introduced, and preliminary benchmark results for the upcoming OpenAI o3 models were shared. On January 23, 2025, OpenAI released Operator, an AI agent and web automation tool for accessing websites to execute goals defined by users. The feature was only available to Pro users in the United States. OpenAI released deep research agent, nine days later. It scored a 27% accuracy on the benchmark Humanity's Last Exam (HLE). Altman later stated GPT-4.5 would be the last model without full chain-of-thought reasoning. In July 2025, reports indicated that AI models by both OpenAI and Google DeepMind solved mathematics problems at the level of top-performing students in the International Mathematical Olympiad. OpenAI's large language model was able to achieve gold medal-level performance, reflecting significant progress in AI's reasoning abilities. On October 6, 2025, OpenAI unveiled its Agent Builder platform during the company's DevDay event. The platform includes a visual drag-and-drop interface that lets developers and businesses design, test, and deploy agentic workflows with limited coding. On October 21, 2025, OpenAI introduced ChatGPT Atlas, a browser integrating the ChatGPT assistant directly into web navigation, to compete with existing browsers such as Google Chrome and Apple Safari. On December 11, 2025, OpenAI announced GPT-5.2. This model will be better at creating spreadsheets, building presentations, perceiving images, writing code and understanding long context. On January 27, 2026, OpenAI introduced Prism, a LaTeX-native workspace meant to assist scientists to help with research and writing. The platform utilizes GPT-5.2 as a backend to automate the process of drafting for scientific papers, including features for managing citations, complex equation formatting, and real-time collaborative editing. In March 2023, the company was criticized for disclosing particularly few technical details about products like GPT-4, contradicting its initial commitment to openness and making it harder for independent researchers to replicate its work and develop safeguards. OpenAI cited competitiveness and safety concerns to justify this repudiation. OpenAI's former chief scientist Ilya Sutskever argued in 2023 that open-sourcing increasingly capable models was increasingly risky, and that the safety reasons for not open-sourcing the most potent AI models would become "obvious" in a few years. In September 2025, OpenAI published a study on how people use ChatGPT for everyday tasks. The study found that "non-work tasks" (according to an LLM-based classifier) account for more than 72 percent of all ChatGPT usage, with a minority of overall usage related to business productivity. In July 2023, OpenAI launched the superalignment project, aiming within four years to determine how to align future superintelligent systems. OpenAI promised to dedicate 20% of its computing resources to the project, although the team denied receiving anything close to 20%. OpenAI ended the project in May 2024 after its co-leaders Ilya Sutskever and Jan Leike left the company. In August 2025, OpenAI was criticized after thousands of private ChatGPT conversations were inadvertently exposed to public search engines like Google due to an experimental "share with search engines" feature. The opt-in toggle, intended to allow users to make specific chats discoverable, resulted in some discussions including personal details such as names, locations, and intimate topics appearing in search results when users accidentally enabled it while sharing links. OpenAI announced the feature's permanent removal on August 1, 2025, and the company began coordinating with search providers to remove the exposed content, emphasizing that it was not a security breach but a design flaw that heightened privacy risks. CEO Sam Altman acknowledged the issue in a podcast, noting users often treat ChatGPT as a confidant for deeply personal matters, which amplified concerns about AI handling sensitive data. Management In 2018, Musk resigned from his Board of Directors seat, citing "a potential future conflict [of interest]" with his role as CEO of Tesla due to Tesla's AI development for self-driving cars. OpenAI stated that Musk's financial contributions were below $45 million. On March 3, 2023, Reid Hoffman resigned from his board seat, citing a desire to avoid conflicts of interest with his investments in AI companies via Greylock Partners, and his co-founding of the AI startup Inflection AI. Hoffman remained on the board of Microsoft, a major investor in OpenAI. In May 2024, Chief Scientist Ilya Sutskever resigned and was succeeded by Jakub Pachocki. Co-leader Jan Leike also departed amid concerns over safety and trust. OpenAI then signed deals with Reddit, News Corp, Axios, and Vox Media. Paul Nakasone then joined the board of OpenAI. In August 2024, cofounder John Schulman left OpenAI to join Anthropic, and OpenAI's president Greg Brockman took extended leave until November. In September 2024, CTO Mira Murati left the company. In November 2025, Lawrence Summers resigned from the board of directors. Governance and legal issues In May 2023, Sam Altman, Greg Brockman and Ilya Sutskever posted recommendations for the governance of superintelligence. They stated that superintelligence could happen within the next 10 years, allowing a "dramatically more prosperous future" and that "given the possibility of existential risk, we can't just be reactive". They proposed creating an international watchdog organization similar to IAEA to oversee AI systems above a certain capability threshold, suggesting that relatively weak AI systems on the other side should not be overly regulated. They also called for more technical safety research for superintelligences, and asked for more coordination, for example through governments launching a joint project which "many current efforts become part of". In July 2023, the FTC issued a civil investigative demand to OpenAI to investigate whether the company's data security and privacy practices to develop ChatGPT were unfair or harmed consumers (including by reputational harm) in violation of Section 5 of the Federal Trade Commission Act of 1914. These are typically preliminary investigative matters and are nonpublic, but the FTC's document was leaked. In July 2023, the FTC launched an investigation into OpenAI over allegations that the company scraped public data and published false and defamatory information. They asked OpenAI for comprehensive information about its technology and privacy safeguards, as well as any steps taken to prevent the recurrence of situations in which its chatbot generated false and derogatory content about people. The agency also raised concerns about ‘circular’ spending arrangements—for example, Microsoft extending Azure credits to OpenAI while both companies shared engineering talent—and warned that such structures could negatively affect the public. In September 2024, OpenAI's global affairs chief endorsed the UK's "smart" AI regulation during testimony to a House of Lords committee. In February 2025, OpenAI CEO Sam Altman stated that the company is interested in collaborating with the People's Republic of China, despite regulatory restrictions imposed by the U.S. government. This shift comes in response to the growing influence of the Chinese artificial intelligence company DeepSeek, which has disrupted the AI market with open models, including DeepSeek V3 and DeepSeek R1. Following DeepSeek's market emergence, OpenAI enhanced security protocols to protect proprietary development techniques from industrial espionage. Some industry observers noted similarities between DeepSeek's model distillation approach and OpenAI's methodology, though no formal intellectual property claim was filed. According to Oliver Roberts, in March 2025, the United States had 781 state AI bills or laws. OpenAI advocated for preempting state AI laws with federal laws. According to Scott Kohler, OpenAI has opposed California's AI legislation and suggested that the state bill encroaches on a more competent federal government. Public Citizen opposed a federal preemption on AI and pointed to OpenAI's growth and valuation as evidence that existing state laws have not hampered innovation. Before May 2024, OpenAI required departing employees to sign a lifelong non-disparagement agreement forbidding them from criticizing OpenAI and acknowledging the existence of the agreement. Daniel Kokotajlo, a former employee, publicly stated that he forfeited his vested equity in OpenAI in order to leave without signing the agreement. Sam Altman stated that he was unaware of the equity cancellation provision, and that OpenAI never enforced it to cancel any employee's vested equity. However, leaked documents and emails refute this claim. On May 23, 2024, OpenAI sent a memo releasing former employees from the agreement. OpenAI was sued for copyright infringement by authors Sarah Silverman, Matthew Butterick, Paul Tremblay and Mona Awad in July 2023. In September 2023, 17 authors, including George R. R. Martin, John Grisham, Jodi Picoult and Jonathan Franzen, joined the Authors Guild in filing a class action lawsuit against OpenAI, alleging that the company's technology was illegally using their copyrighted work. The New York Times also sued the company in late December 2023. In May 2024 it was revealed that OpenAI had destroyed its Books1 and Books2 training datasets, which were used in the training of GPT-3, and which the Authors Guild believed to have contained over 100,000 copyrighted books. In 2021, OpenAI developed a speech recognition tool called Whisper. OpenAI used it to transcribe more than one million hours of YouTube videos into text for training GPT-4. The automated transcription of YouTube videos raised concerns within OpenAI employees regarding potential violations of YouTube's terms of service, which prohibit the use of videos for applications independent of the platform, as well as any type of automated access to its videos. Despite these concerns, the project proceeded with notable involvement from OpenAI's president, Greg Brockman. The resulting dataset proved instrumental in training GPT-4. In February 2024, The Intercept as well as Raw Story and Alternate Media Inc. filed lawsuit against OpenAI on copyright litigation ground. The lawsuit is said to have charted a new legal strategy for digital-only publishers to sue OpenAI. On April 30, 2024, eight newspapers filed a lawsuit in the Southern District of New York against OpenAI and Microsoft, claiming illegal harvesting of their copyrighted articles. The suing publications included The Mercury News, The Denver Post, The Orange County Register, St. Paul Pioneer Press, Chicago Tribune, Orlando Sentinel, Sun Sentinel, and New York Daily News. In June 2023, a lawsuit claimed that OpenAI scraped 300 billion words online without consent and without registering as a data broker. It was filed in San Francisco, California, by sixteen anonymous plaintiffs. They also claimed that OpenAI and its partner as well as customer Microsoft continued to unlawfully collect and use personal data from millions of consumers worldwide to train artificial intelligence models. On May 22, 2024, OpenAI entered into an agreement with News Corp to integrate news content from The Wall Street Journal, the New York Post, The Times, and The Sunday Times into its AI platform. Meanwhile, other publications like The New York Times chose to sue OpenAI and Microsoft for copyright infringement over the use of their content to train AI models. In November 2024, a coalition of Canadian news outlets, including the Toronto Star, Metroland Media, Postmedia, The Globe and Mail, The Canadian Press and CBC, sued OpenAI for using their news articles to train its software without permission. In October 2024 during a New York Times interview, Suchir Balaji accused OpenAI of violating copyright law in developing its commercial LLMs which he had helped engineer. He was a likely witness in a major copyright trial against the AI company, and was one of several of its current or former employees named in court filings as potentially having documents relevant to the case. On November 26, 2024, Balaji died by suicide. His death prompted the circulation of conspiracy theories alleging that he had been deliberately silenced. California Congressman Ro Khanna endorsed calls for an investigation. On April 24, 2025, Ziff Davis sued OpenAI in Delaware federal court for copyright infringement. Ziff Davis is known for publications such as ZDNet, PCMag, CNET, IGN and Lifehacker. In April 2023, the EU's European Data Protection Board (EDPB) formed a dedicated task force on ChatGPT "to foster cooperation and to exchange information on possible enforcement actions conducted by data protection authorities" based on the "enforcement action undertaken by the Italian data protection authority against OpenAI about the ChatGPT service". In late April 2024 NOYB filed a complaint with the Austrian Datenschutzbehörde against OpenAI for violating the European General Data Protection Regulation. A text created with ChatGPT gave a false date of birth for a living person without giving the individual the option to see the personal data used in the process. A request to correct the mistake was denied. Additionally, neither the recipients of ChatGPT's work nor the sources used, could be made available, OpenAI claimed. OpenAI was criticized for lifting its ban on using ChatGPT for "military and warfare". Up until January 10, 2024, its "usage policies" included a ban on "activity that has high risk of physical harm, including", specifically, "weapons development" and "military and warfare". Its new policies prohibit "[using] our service to harm yourself or others" and to "develop or use weapons". In August 2025, the parents of a 16-year-old boy who died by suicide filed a wrongful death lawsuit against OpenAI (and CEO Sam Altman), alleging that months of conversations with ChatGPT about mental health and methods of self-harm contributed to their son's death and that safeguards were inadequate for minors. OpenAI expressed condolences and said it was strengthening protections (including updated crisis response behavior and parental controls). Coverage described it as a first-of-its-kind wrongful death case targeting the company's chatbot. The complaint was filed in California state court in San Francisco. In November 2025, the Social Media Victims Law Center and Tech Justice Law Project filed seven lawsuits against OpenAI, of which four lawsuits alleged wrongful death. The suits were filed on behalf of Zane Shamblin, 23, of Texas; Amaurie Lacey, 17, of Georgia; Joshua Enneking, 26, of Florida; and Joe Ceccanti, 48, of Oregon, who each committed suicide after prolonged ChatGPT usage. In December 2025, Stein-Erik Soelberg, who was 56 years old at the time, allegedly murdered his mother Suzanne Adams. In the months prior the paranoid, delusional man often discussed his ideas with ChatGPT. Adam's estate then sued OpenAI claiming that the company shared responsibility due to the risk of chatbot psychosis despite the fact that chatbot psychosis is not a real medical diagnosis. OpenAI responded saying they will make ChatGPT safer for users disconnected from reality. See also References Further reading External links |
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Category:Nintendo 3DS eShop games Contents Subcategories This category has the following 3 subcategories, out of 3 total. Pages in category "Nintendo 3DS eShop games" The following 200 pages are in this category, out of approximately 406 total. This list may not reflect recent changes. |
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[SOURCE: https://en.wikipedia.org/wiki/Ultimate_Fighting_Championship] | [TOKENS: 21202] |
Contents Ultimate Fighting Championship Page version status This is an accepted version of this page The Ultimate Fighting Championship (UFC) is an American mixed martial arts (MMA) promotion company based in Las Vegas, Nevada. It is owned and operated by TKO Group Holdings, itself a majority owned subsidiary of Endeavor Group Holdings. The largest MMA promotion in the world, the UFC has over 578 fighters contracted that fight across 11 weight divisions (eight men's and three women's). The organization produces events worldwide and abides by the Unified Rules of Mixed Martial Arts. As of 2025[update], it had held over 750 events. Dana White has been its president since 2001 and CEO since 2023. Under White's stewardship, it has grown into a global multi-billion-dollar enterprise. The UFC was founded by businessman Art Davie, martial artist Rorion Gracie, and film director John Milius, with the backing of Semaphore Entertainment Group (SEG) CEO Bob Meyrowitz, President David Isaacs, and Head of Programming Campbell McLaren. The first event was held in 1993 at McNichols Sports Arena in Denver, Colorado. The purpose of the UFC's early competitions was to identify the most effective martial art in a contest with minimal rules and no weight classes between competitors of different fighting disciplines. In subsequent events, more rigorous rules were created and fighters began adopting effective techniques from more than one discipline, which indirectly helped create a separate style of fighting known as present-day mixed martial arts. The UFC was initially owned by SEG until it had financial issues and it was sold to the brothers Frank and Lorenzo Fertitta in 2001, who formed the company Zuffa to operate the UFC, and placed Dana White as the president of the company. In 2016, UFC's parent company, Zuffa, was sold to a group led by Endeavor, then known as William Morris Endeavor (WME–IMG), including Silver Lake Partners, Kohlberg Kravis Roberts and MSD Capital for US$4.025 billion. In 2021, Endeavor bought out Zuffa's other owners for $1.7 billion. With a TV deal and expansion in Australia, Asia, Europe, and new markets within the United States, the UFC has achieved greater mainstream media coverage. It earned US$609 million in 2015, and its previous domestic media rights agreement with ESPN was valued at $1.5 billion over a five-year term. In April 2023, Endeavor Group Holdings announced that UFC would merge with the wrestling promotion WWE to form TKO Group Holdings, a new public company majority-owned by Endeavor, with Vince McMahon serving as an executive chairman of the new entity and White remaining as UFC president. The merger was completed on September 12, 2023. In January 2024, McMahon had ended his ties with the company amid a sex trafficking scandal. In 2025, the UFC signed a 7-year, US$7.7 billion deal with Paramount Skydance Corporation (operators of CBS Sports and Paramount+) beginning the next year, exiting the pay-per-view business entirely. History Art Davie proposed to John Milius and Rorion Gracie an eight-man single-elimination tournament called "War of the Worlds". It was inspired by the "Gracies in Action" video-series produced by the Gracie family of Brazil which featured Gracie jiu-jitsu students defeating martial artists of various disciplines such as karate, kung fu, and kickboxing on Vale Tudo matches. The tournament would also feature martial artists from different disciplines facing each other in no-holds-barred combat to determine the best martial art, and would aim to replicate the excitement of the matches Davie saw on the videos. Gracie accepted, as he was interested in showcasing and promoting his family's own jiu-jitsu for a wide audience. Milius, a film director/screenwriter and Gracie student, agreed to be the event's creative director. Davie drafted the business plan, and 28 investors contributed the initial capital to start WOW Promotions to develop the tournament into a television franchise. In 1993, WOW Promotions sought a television partner and approached pay-per-view producers TVKO (HBO) and SET (Showtime), and Campbell McLaren and David Isaacs at Semaphore Entertainment Group (SEG). Both TVKO and SET declined, but SEG—a pioneer in pay-per-view television that had produced such offbeat events as a tennis match between Jimmy Connors and Martina Navratilova—became WOW's partner in May 1993. UFC promoters initially pitched the event as a real-life fighting video game tournament similar to Street Fighter and Mortal Kombat. SEG contacted video and film art director Jason Cusson to design a fighting arena for the event. Rorion and Davie didn't want a traditional roped ring, citing fears—by showing old Vale Tudo footage—that the fighters could escape through the ropes during grappling and use it as an advantage, or fall off and hurt themselves. SEG's executives agreed, and also wanted a way to visually differentiate their event from professional boxing and professional wrestling. Some ideas included a traditional roped-ring surrounded by netting, a moat with alligators, a raised platform surrounded by razor-wire fence, electrified fencing, men in togas and netting that could be lowered from the ceiling by a pulley. Eventually Cusson designed an arena with eight sides surrounded by chain-link fence, the trademarked Octagon, which became the event's signature setting. Cusson remained the group's production designer through UFC 27. SEG devised the show's name as "The Ultimate Fighting Championship". WOW Promotions and SEG produced the first event, later retroactively called UFC 1, at McNichols Sports Arena in Denver, Colorado on November 12, 1993. Art Davie was its booker and matchmaker. It proposed to find answers for sports fans' questions such as, "Can a wrestler beat a boxer?" As with most martial arts at the time, fighters typically had skills in just one discipline and little experience against opponents with differing skills. The television broadcast featured kickboxer Kevin Rosier, taekwondo practitioner Patrick Smith, savate fighter Gerard Gordeau, karate expert Zane Frazier, shootfighter Ken Shamrock, sumo wrestler Teila Tuli, boxer Art Jimmerson, and 175 lb (79 kg) Brazilian jiu-jitsu black belt Royce Gracie—younger brother of UFC co-founder Rorion, whom Rorion selected to represent his family. Royce's submission skills proved the most effective in the inaugural tournament, earning him the first ever UFC tournament championship after submitting Jimmerson, Shamrock, and Gordeau in succession. The show was extremely successful, with 86,592 pay-per-view television subscribers. It's disputed whether the promoters intended the event to be a precursor to future events. "That show was only supposed to be a one-off", eventual UFC president Dana White said. "It did so well on pay-per-view they decided to do another, and another. Never in a million years did these guys think they were creating a sport." Davie, in his 2014 book Is This Legal?, an account of the creation of the first UFC event, disputes the perception that the UFC was seen by WOW Promotions and SEG as a one-off, since SEG offered a five-year joint development deal to WOW. He says, "Clearly, both Campbell and Meyrowitz shared my unwavering belief that War of the Worlds[b] would be a continuing series of fighting tournaments—a franchise, rather than a one-night stand." With no weight classes, fighters often faced significantly larger or taller opponents. Keith "The Giant Killer" Hackney faced Emmanuel Yarbrough at UFC 3 with a 9-inch height and 400 pounds (180 kg) weight disadvantage. During this early phase of the organization, the UFC showcased a bevy of styles and fighters. Aside from the aforementioned Royce Gracie, Ken Shamrock, and Patrick Smith, they also featured competitors such as Hall of Famer Dan Severn, Marco Ruas, Gary Goodridge, Don Frye, Kimo Leopoldo, Oleg Taktarov, and Tank Abbott. In April 1995, following UFC 5 in Charlotte, North Carolina, Davie and Gracie sold their interest in the franchise to SEG and disbanded WOW Promotions. Although UFC used the tagline "There are no rules" in the early 1990s, the UFC did in fact operate with limited rules. In a UFC 4 qualifying match, competitors Jason Fairn and Guy Mezger agreed not to pull hair—as they both wore pony tails tied back for the match. The UFC had a reputation, especially in the early days, as an extremely violent event. UFC 5 also introduced the first singles match, a rematch from the inaugural UFC featuring three-time champion Royce Gracie and Ken Shamrock, called "The Superfight". "The Superfight" began as a non-tournament match that would determine the first reigning UFC Champion for tournament winners to face; it later evolved into a match that could feature either title matches or non-title matches. The "Superfight" would eventually completely phase out tournament matches. On the other hand, the first "Superfight" at UFC 5 was also considered a failure. In the first minute of the fight Shamrock knocked Royce to the ground and landed inside his guard. For the next 30 minutes Shamrock was inside Royce's guard, with the two throwing punches and headbutts at each other but without any change or action, with the crowd booing the fighters. After 30 minutes the fight was stopped as it had exceeded the time limit allocated for the pay-per-view and was given another 5 minutes of extra time due to protests from the spectators. The fight was over after 36 minutes and a draw was declared. Because of this controversial fight, the UFC would later start to introduce time limits, judges to decide draws, and authorized referees to stand up fighters and restart the bout if they have too much inactivity. In 1996, the UFC had its first event outside continental United States with UFC 8 in Bayamón, Puerto Rico, and in 1997, UFC Japan: Ultimate Japan was its first foreign event. The violent nature of the burgeoning sport quickly drew the attention of U.S. authorities. In 1996, U.S. Senator John McCain saw a tape of the first UFC events and immediately found it abhorrent. He led a campaign to ban the UFC, calling it "human cockfighting", and sent letters to the governors of all 50 US states asking them to ban it. Thirty-six states enacted laws that banned "no-holds-barred" fighting, including New York, which enacted the ban on the eve of UFC 12, forcing it to relocate to Dothan, Alabama. The UFC continued to air on DirecTV PPV, though its audience remained minuscule compared to the era's larger cable pay-per-view platforms. In response to the criticism, the UFC increased cooperation with state athletic commissions and modified its rules to remove the less palatable elements of fights while retaining the core elements of striking and grappling. UFC 12 saw the introduction of weight classes and the banning of fish-hooking. For UFC 14, gloves became mandatory, while kicks to the head of a downed opponent were banned. UFC 15 saw limitations on hair pulling, and the banning of strikes to the back of the neck and head, headbutting, small-joint manipulations, and groin strikes. With five-minute rounds introduced at UFC 21, the UFC gradually rebranded itself as a sport rather than a spectacle. The implementation of rules changed the game of many fighters, such as Mark Coleman; Coleman made potent use of headbutts for his ground-and-pound tactics, which was banned with the new ruleset. Led by UFC commissioner Jeff Blatnick and referee John McCarthy, the UFC continued to work with state athletic commissions. Blatnick, McCarthy, and matchmaker Joe Silva created a manual of policies, procedures, codes of conduct, and rules to help in getting the UFC sanctioned by the athletic commissions, many of which exist to this day. Blatnick and McCarthy traveled around the country, educating regulators and changing perceptions about a sport that was thought to be bloodthirsty and inhumane. By April 2000, their movement had clearly made an impact. California was set to become the first state in the U.S. to sign off on a set of codified rules that governed MMA. Soon after, New Jersey adopted the language. As the UFC continued to work with the athletic commissions, events took place in smaller U.S. markets, and venues, such as the Lake Charles Civic Center. The markets included states that are largely rural and less known for holding professional sporting events, such as Iowa, Mississippi, Louisiana, Wyoming, and Alabama. SEG could not secure home-video releases for UFC 23 through UFC 29. With other mixed martial arts promotions working towards U.S. sanctioning, the International Fighting Championships (IFC) secured the first U.S. sanctioned mixed martial arts event, which occurred in New Jersey on September 30, 2000. Just two months later, the UFC held its first sanctioned event, UFC 28, under the New Jersey State Athletic Control Board's "Unified Rules". After the long battle to secure sanctioning, SEG stood on the brink of bankruptcy, when Station Casinos executives Frank and Lorenzo Fertitta and their business partner Dana White approached them in 2000, with an offer to purchase the UFC. A month later, in January 2001, the Fertittas bought the UFC for $2 million and created Zuffa, LLC as the parent entity controlling the UFC. "I had my attorneys tell me that I was crazy because I wasn't buying anything. I was paying $2 million and they were saying 'What are you getting?'" Lorenzo Fertitta revealed to Fighters Only magazine, recalling the lack of assets he acquired in the purchase. "And I said 'What you don't understand is I'm getting the most valuable thing that I could possibly have, which is those three letters: UFC. That is what's going to make this thing work. Everybody knows that brand, whether they like it or they don't like it, they react to it.'" Along with the trademark, they acquired a wooden octagon and around a dozen fighter's contracts. Later on, they negotiated a deal to buy UFC's DVD rights from Lionsgate for an additional two million dollars. With ties to the Nevada State Athletic Commission (Lorenzo Fertitta was a former member of the NSAC), Zuffa secured sanctioning in Nevada in 2001. Shortly thereafter, the UFC returned to pay-per-view cable television, with UFC 33 featuring three championship bouts. The UFC slowly rose in popularity after the Zuffa purchase, due partly to greater advertising, corporate sponsorship, the return to cable pay-per-view, and subsequent home video and DVD releases. White later said that "Nobody took us seriously, except Donald Trump. Donald was the first to recognize the potential that we saw in the UFC, and encouraged us to build our business". With larger live gates at casino venues like the Trump Taj Mahal and the MGM Grand Garden Arena, the UFC secured its first television deal with Fox Sports Net. The Best Damn Sports Show Period aired the first mixed martial arts match on American cable television in June 2002, as well as the main event showcasing Chuck Liddell vs. Vitor Belfort at UFC 37.5. Later, FSN would air highlight shows from the UFC. UFC 40 proved to be the most critical event to date in the Zuffa era. The event was a near sellout of 13,022 at the MGM Grand Arena and sold 150,000 pay-per-view buys, a rate roughly double that of the previous Zuffa events. The event featured a card headlined by a championship match between then-current UFC Light Heavyweight Champion Tito Ortiz and former UFC Superfight Champion Ken Shamrock, who had previously left to professionally wrestle in WWE before returning to MMA. It was the first time the UFC hit such a high mark since being forced "underground" in 1997. UFC 40 also garnered mainstream attention from media outlets such as ESPN and USA Today, something that was unfathomable for mixed martial arts at that point in time. Many have suggested that the success of UFC 40 and the anticipation for Ortiz vs. Shamrock saved the UFC from bankruptcy; the buyrates of the previous Zuffa shows averaged a mere 45,000 buys per event, and the company was suffering deep monetary losses. The success of UFC 40 provided a glimmer of hope for the UFC, and kept alive the hope that mixed martial arts could become big. Beyond the rivalry itself, the success of UFC 40 was due in part to the marketing and outreach power of crossover athletes – from Pro Wrestling to MMA and MMA to Pro Wrestling – a practice with roots in Japan's Pride Fighting Championships. Long time UFC referee John McCarthy said that he felt UFC 40 was the turning point in whether or not the sport of MMA would survive in America. "When that show (UFC 40) happened, I honestly felt like it was going to make it. Throughout the years, things were happening, and everything always looked bleak. It always looked like, this is it, this is going to be the last time. This is going to be the last year. But, when I was standing in the Octagon at UFC 40, I remember standing there before the Ortiz/Shamrock fight and looking around. The energy of that fight, it was phenomenal, and it was the first time I honestly said, it's going to make it." –"Big" John McCarthy Despite the success of UFC 40, the UFC was still experiencing financial deficits. By 2004, Zuffa had $34 million in losses since they purchased the UFC. Faced with the prospect of folding, the UFC stepped outside the bounds of pay-per-view and made a foray into television. After being featured in a reality television series, American Casino, and seeing how well the series worked as a promotion vehicle, the Fertitta brothers developed the idea of UFC creating its own reality series. Their idea, The Ultimate Fighter (TUF), was a reality television show featuring up-and-coming MMA fighters in competition for a six-figure UFC contract, with fighters eliminated from competition via exhibition mixed martial arts matches. It was pitched to several networks, each one rejecting the idea outright. Not until they approached Spike TV, with an offer to pay the $10 million production costs themselves, did they find an outlet. In January 2005, Spike TV launched The Ultimate Fighter 1 (TUF 1) in the timeslot following WWE Raw. The show became an instant success, culminating with a notable season finale brawl featuring light heavyweight finalists Forrest Griffin and Stephan Bonnar going toe-to-toe for the right to earn the six-figure contract. The live broadcast of the season finale drew a very impressive 1.9 overall rating. Dana White credits TUF 1 for saving the UFC, and claims that the contract for the second season was made outside of the venue on a napkin immediately after the finale. On the heels of the Griffin/Bonnar finale, a second season of The Ultimate Fighter launched in August 2005, and two more seasons appeared in 2006. Spike and the UFC continued to create and air new seasons until the show moved to FX in 2012. Following the success of The Ultimate Fighter, Spike also picked up UFC Unleashed, an hour-long weekly show featuring select fights from previous events. Spike also signed on to broadcast live UFC Fight Night, a series of fight events debuting in August 2005, and Countdown specials to promote upcoming UFC pay-per-view cards. After a very successful run on Spike and with the upcoming announcement of the UFC's new relationship with Fox, Spike officials made a statement regarding the end of their partnership with the UFC, "The Ultimate Fighter season 14 in September will be our last... Our 6-year partnership with the UFC has been incredibly beneficial in building both our brands, and we wish them all the best in the future." With the announcement of UFC's partnership with Fox in August 2011, The Ultimate Fighter, which entered its 14th season in that September, moved to the FX network to air on Friday nights starting with season 15 in the Spring of 2012. Along with the network change, episodes are now edited and broadcast within a week of recording instead of a several-month delay, and elimination fights are aired live. With increased visibility, the UFC's pay-per-view buy numbers exploded. UFC 52, the first event after the first season of The Ultimate Fighter featuring eventual-UFC Hall of Famer: Chuck "The Iceman" Liddell, avenging his defeat to fellow eventual-Hall of Famer, Randy Couture, drew a pay-per-view audience of 300,000, doubling its previous benchmark of 150,000 set at UFC 40. Following the second season of The Ultimate Fighter, the UFC's match between Liddell and Couture drew an estimated 410,000 pay-per-view buys at UFC 57. For the rest of 2006, pay-per-view buy rates continued to skyrocket, with 620,000 buys for UFC 60: Hughes vs. Gracie — featuring Royce Gracie's first UFC fight in 11 years—and 775,000 buys for UFC 61 featuring the highly anticipated rematch between Ken Shamrock and Tito Ortiz, the coaches of The Ultimate Fighter 3. The organization hit a milestone with UFC 66, pitting Ortiz in a rematch against Liddell with over 1 million buys. The surge in popularity prompted the UFC to beef up its executive team. In March 2006, the UFC announced that it had hired Marc Ratner, former executive director of the Nevada Athletic Commission, as Vice President of Regulatory Affairs. Ratner, once an ally of Senator McCain's campaign against no holds barred fighting, lobbied numerous athletic commissions to help raise the UFC's media profile in an attempt to legalize mixed martial arts in jurisdictions inside and outside the United States that had yet to sanction the sport. In December 2006, Zuffa acquired the northern California-based promotion World Extreme Cagefighting (WEC) in order to stop the International Fight League (IFL) from making a deal with Versus (now NBC Sports Network). At the time, the UFC had an exclusive deal with Spike, so the purchase of the WEC allowed Zuffa to block the IFL from Versus without violating their contract. The WEC showcased lighter weight classes in MMA, whereas the UFC featured heavier weight classes. In December 2006, Zuffa also acquired their cross-town, Las Vegas rival World Fighting Alliance (WFA). The WFA had signed major fighters at the time, most notably Quinton "Rampage" Jackson and Lyoto Machida, but their events turned out to be a financial disaster. Zuffa bought select assets from WFA, including select fighter contracts, as well as trademarks and other intellectual property. The sport's popularity was also noticed by the sports betting community as BodogLife.com, an online gambling site, stated in July 2007 that in 2007 UFC would surpass boxing for the first time in terms of betting revenues. In fact, the UFC had already broken the pay-per-view industry's all-time records for a single year of business, generating over $222,766,000 in revenue in 2006, surpassing both WWE and boxing. The UFC continued its rapid rise from near obscurity with Roger Huerta gracing the cover of Sports Illustrated and Chuck Liddell on the front of ESPN The Magazine in May 2007. In Japan, Mixed Martial Arts took a separate, yet convergent evolution, with origins in "shoot wrestling", a form of professional wrestling which had more realistic-looking moves and matches while deemphasizing theatrical elements. Promotions like Shooto and Pancrase discarded the scripts and were already putting on hybrid fighting shows with real fights by the time the UFC was founded. This culminated in the creation of Pride Fighting Championships in 1997. At its height, Pride was the world's most popular MMA promotion, and helped to popularize the sport in Japan and in the world. Having high attendances on large sports arenas and watched by millions of spectators through free-to-air and pay-per-view television. Meanwhile, the UFC was struggling with political persecution, low pay-per-view sales, and doing events in backwater casinos. At that time, many of UFC's best fighters would leave to fight in Pride or other Japanese organizations instead due better pay and prestige. However, on 2006, Pride started to have financial issues due the termination of lucrative contracts with Japanese TV due a scandal revealing the strong ties between Pride and the yakuza. On March 27, 2007, the UFC and Pride announced an agreement in which the majority owners of the UFC, Frank and Lorenzo Fertitta, would purchase the Pride brand. Initial intentions were for the organizations to be run separately but aligned together with plans to co-promote cards featuring the champions and top contenders from both organizations, making comparisons to the AFL–NFL merger and the creation of a "Super Bowl" of MMA. However, after purchasing Pride, Dana White felt that the Pride model was not sustainable and that the brand became "toxic" in Japan, being difficult to find a new television deal. The organization instead folded, with many former Pride fighters such as Antônio Rodrigo "Minotauro" Nogueira, Maurício "Shogun" Rua, Dan Henderson, Mirko "Cro Cop" Filipović, Wanderlei Silva, and others already being realigned under the UFC brand. On October 4, 2007, Pride Worldwide closed its Japanese office, laying off 20 people who were working there since the closing of its parent company Dream Stage Entertainment (DSE). On June 18, 2008, Lorenzo Fertitta accommodated the UFC's growth by announcing his resignation from Station Casinos in order to devote his energies to the international business development of Zuffa, particularly the UFC. The move proved to be pivotal, as Fertitta helped strike TV deals in China, France, Mexico, and Germany as well as open alternative revenue streams with a new UFC video game and UFC action figures, among other projects. Popularity surged in 2009 with UFC 100 and the 10 events preceding it including UFC 90, 91, 92, 94, and 98. UFC 100 was a success, garnering 1.6 million buys under the drawing power of former NCAA wrestling and WWE Champion Brock Lesnar and his rematch with former UFC Heavyweight Champion Frank Mir, Canadian Georges St-Pierre going head-to-head with Brazilian Thiago Alves, and American Dan Henderson opposing British Michael Bisping at middleweight after the two were rival coaches on The Ultimate Fighter: United States vs. United Kingdom. UFC 100 drew interest from ESPN, which provided coverage of the event in the days preceding and following it. ESPN would eventually devote additional coverage of the UFC and other MMA news with the television debut of MMA Live on ESPN2 in May 2010. The buzz from UFC 100 was hampered significantly in the second half of 2009 after a rash of injuries and other health-related issues—including Brock Lesnar's life-threatening bout with diverticulitis—forcing the organization to continuously scramble and reshuffle its lineup for several events. However, the momentum gradually began to pick up in the first quarter of 2010 after victories from defending champions Georges St-Pierre and Anderson Silva, as well as Lyoto Machida's first career defeat to "Shogun" Rua for the UFC Light Heavyweight title. These fights segued into a very popular clash between former UFC Champions and rivals Rashad Evans and Quinton "Rampage" Jackson—rival coaches on The Ultimate Fighter 10: Heavyweights—at UFC 114, featuring the UFC's first main event headlined by black fighters. The event scored over 1 million pay per view buys as Evans secured a unanimous decision victory. This momentum carried into the summer of 2010 at UFC 116, which featured the return of Brock Lesnar defending his UFC Heavyweight title against the undefeated interim-champion Shane Carwin before 1.25 million PPV viewers. Lesnar survived an early barrage of Carwin's punches in a contest that was nearly stopped by referee Josh Rosenthal. However, Lesnar recovered in the second round to submit Carwin via arm-triangle choke to retain the undisputed UFC Heavyweight Championship. The event as a whole was critically acclaimed in the media for living up to the hype with a number of exciting fights. After a fifth round, last-minute victory by UFC Middleweight Champion Anderson Silva over Chael Sonnen at UFC 117, Lesnar finally surrendered his belt to the undefeated Cain Velasquez via 1st-round TKO at UFC 121. The fight produced Velasquez's eighth knockout or technical knockout in his first nine MMA fights. UFC 129 featured Georges St-Pierre vs. Jake Shields at the Rogers Centre in Toronto, Ontario, Canada and is currently the largest UFC event in North American history, which coincided with a two-day UFC Fan Expo at the Direct Energy Centre. The event sold out 55,000 tickets for gate revenues exceeding $11 million, shattering previous MMA attendance and gate records in North America. On November 5, 2016, the UFC had its first exhibition in New York City after years of being delayed by government officials and red tape with a dramatic first match, Conor McGregor vs. Eddie Alvarez. Zuffa, the parent company of the UFC, purchased World Extreme Cagefighting in late 2006 and held the first WEC event under new ownership on January 20, 2007. Soon thereafter the WEC made its home on the Versus Network with its first event debuting on that network in June 2007. On October 28, 2010, Zuffa announced that WEC would merge with the UFC. The WEC held its final card on December 16, 2010. As a result of the merger, the UFC absorbed WEC's bantamweight, featherweight and lightweight weight divisions and their respective fighters. The UFC also made the last WEC Featherweight and Bantamweight Champions, José Aldo and Dominick Cruz respectively, the inaugural UFC Champions of their new weight divisions. Reed Harris, who started World Extreme Cagefighting with Scott Adams, had mixed emotions on the merger. "It's kind of like when your kid goes off to college: at first you're not happy, but after you think about it for a while, you're really happy," Harris said following the announcement. "At the end of the day, I never imagined this thing would be where we're at today. I'm extremely proud and happy that I was involved with something that will now be part of what may be, some day, the largest sports organization in the world." On March 12, 2011, Dana White announced that Zuffa had purchased Strikeforce. White said that Strikeforce will operate as an independent promotion, and that CEO Scott Coker will continue to run the promotion. Coker announced the return of Fedor Emelianenko on an unspecified July or August event and said that Zuffa-owned company would continue to co-promote with M-1 Global. After an extension was reached to continue Strikeforce through 2012, the promotion's heavyweight division (sans Heavyweight Grand Prix finalists) was merged into the UFC, and the promotion's Challengers series was ended. The final Strikeforce show was Strikeforce: Marquardt vs. Saffiedine on January 12, 2013, after which the promotion was dissolved and all fighter contracts were either ended or absorbed into the UFC. On August 18, 2011, The Ultimate Fighting Championship and Fox announced a seven-year broadcast deal through the Fox Sports subsidiary, effectively ending the UFC's Spike TV and Versus (now NBC Sports Network) partnership. The deal includes four events on the main Fox network, 32 live Friday night fights per year on their cable network FX, 24 events following The Ultimate Fighter reality show and six separate Fight Night events. The promotion's first broadcast television event – UFC on Fox: Velasquez vs. dos Santos – broke form by showcasing only one fight to television viewers. In the main event, Junior dos Santos abruptly dethroned then-undefeated UFC heavyweight champion Cain Velasquez by knock-out at 1:04 in the first round. The telecast peaked with 8.8 million viewers tuning into the fight with an average audience of 5.7 million, making it by far the most-watched MMA event of all-time and the most-watched combat sports event since 2003's HBO bout between Lennox Lewis and Vitali Klitschko. One of the other programming opportunities that emerged was a weekly UFC magazine-style show. When asked about potential for a weekly magazine-style series, UFC CEO Lorenzo Fertitta responded, "Not only weekly, but potentially, multiple times per week you'll have a UFC magazine (show)." The UFC maintained production control of its product including use of its broadcast team, Mike Goldberg and Joe Rogan. Fox Sports produced pre- and post-shows. On November 16, 2012, the eve of UFC 154: St. Pierre vs. Condit, Dana White confirmed the UFC would feature women's MMA with the signing of its first female fighter, Strikeforce bantamweight champion Ronda Rousey. She subsequently became the first female UFC champion, the first Olympic medalist with a UFC title, and the first woman to defend a UFC title. She would successfully defend her title six times. On December 11, 2013, the UFC purchased the contracts of 11 female fighters from Invicta Fighting Championships to launch its 115-pound Strawweight division. Eight of the Invicta fighters took part in the 20th season of The Ultimate Fighter, The Ultimate Fighter: Team Pettis vs. Team Melendez, along with eight additional fighters signed up for the tournament via open tryouts. Season winner, Invicta FC's Strawweight Champion, Carla Esparza became the first UFC women's strawweight champion, defeating Rose Namajunas in the finale. Other fighters on the show included Felice Herrig, Tecia Torres, Joanne Calderwood, Bec Hyatt, Randa Markos, Jessica Penne, and Joanna Jędrzejczyk. The first UFC event to be held outside the contiguous United States was UFC 8 in Puerto Rico, a US territory, in 1996. Canada has hosted events 18 times, starting with UFC 83 in 2008 and most recently in 2024 with UFC Fight Night 246. UFC's second biggest event to date was also in Canada, as UFC 129 held at Rogers Centre featured a record-breaking attendance of 55,724. The United Kingdom has been home to 18 events. The first was UFC 38 held in London in 2002. UFC returned to the United Kingdom in 2007 with UFC 70, and visited Northern Ireland for UFC 72. The UK's most recent event was in Manchester, England with UFC 304 in 2024. Ireland has held UFC 93 in 2009 and UFC Fight Night: McGregor vs. Brandao 5 years later. In continental Europe, Germany has hosted 6 times, the first being UFC 99 in 2009, UFC 122 in 2010, UFC Fight Night: Munoz vs. Mousasi in 2014, UFC Fight Night: Jędrzejczyk vs. Penne in 2015, UFC Fight Night: Arlovski vs. Barnett in 2016, and most recently, UFC Fight Night: Shogun vs. Smith in 2018. Sweden has hosted 3 times, starting with UFC on Fuel TV: Gustafsson vs. Silva in 2012, and recently with UFC on Fox: Gustafsson vs. Johnson in 2015. Poland had its first event with UFC Fight Night: Gonzaga vs. Cro Cop 2 in 2015. The first Brazilian event was UFC Brazil: Ultimate Brazil, held in São Paulo in 1998. The promotion did not return to Brazil until 2011 for UFC 134, but since then, the country has hosted a further 20 events. Its most recent visit was UFC Fight Night: Condit vs. Alves. In 2014, Mexico became the second country in Latin America to host an event with UFC 180, followed by a second event, UFC 188, in 2015. Seven UFC events have been held in Australia, beginning with UFC 110 in 2010 and most recently in December 2018 with UFC Fight Night 142. New Zealand held its first event in 2014, UFC Fight Night: Te Huna vs. Marquardt. Its most recent event was UFC Fight Night: Felder vs. Hooker in February 2020. In Asia, the UFC has visited 5 countries. Japan had its first visit in 1997 for UFC Japan: Ultimate Japan. The UFC only returned to the country in 2012, with UFC 144. its last visit was in 2014 for UFC Fight Night: Hunt vs. Nelson, the seventh event there. The promotion has also featured 3 visits to the United Arab Emirates. The first was in 2010 for UFC 112 the second in 2014 for UFC Fight Night: Nogueira vs. Nelson and the third in 2024 for UFC on ABC: Sandhagen vs. Nurmagomedov. The promotion has also visited Macau in 3 occasions: China's special administrative region was first visited in 2012 with UFC on Fuel TV: Franklin vs. Le and last visited in 2014 for UFC Fight Night: Bisping vs. Le. The promotion has also visited Singapore with UFC Fight Night: Saffiedine vs. Lim in 2014. The Philippines was the most recent Asian country that the UFC has visited, with UFC Fight Night: Edgar vs. Faber in 2015. The Ultimate Fighter has had international editions as well: Brazil (since 2012), Australia (vs. United Kingdom – 2012), China (2013), Canada (vs. Australia – 2014), and Latin America (2014). On February 27, 2014, the Nevada State Athletic Commission banned the use of Testosterone Replacement Therapy (TRT). The UFC followed suit and banned the use of TRT for any of its events, including international markets where the UFC oversees regulatory efforts. In December 2014, an antitrust lawsuit was filed against Zuffa by several fighters, claiming the organization restricts control over fighters' careers and earning potential. The case moved to Nevada federal court, where Zuffa was denied its motion to stay discovery for 15 years of its financial records. This caused an ongoing debate and struggle over how UFC sensitive information should be handled, and who may view it. Especially concerning MMAFA founder, Rob Maysey who has taken the lead in representing the former athletes and has stated he hopes to achieve reforms similar to the Ali Act (2000). Later that year, a 12–16 month investigation began that was expected to last until sometime between September 2016 to January 2017. Thus far, both sides have provided over 100,000 documents. It is estimated that the UFC shares between 16% and 22% of its revenue with fighters, which is vastly lower than sports leagues such as the NBA, MLB, and NHL, which share approximately half of the revenue with their athletes. There have been several ongoing lawsuits over the contractual treatment of UFC fighters. One of the most recent cases was filed in 2020 by a group of fighters led by Cung Le and Nate Quarry. They alleged that the UFC violated antitrust laws by engaging in anti-competitive practices that kept fighter pay artificially low. The plaintiffs argued that the UFC's practice of using long-term exclusive contracts and "champion's clauses" (which extend a fighter's contract automatically if they win a title) was intended to suppress fighter pay and prevent them from negotiating with other promotions. They also claimed that the UFC engaged in various other anti-competitive practices, such as blocking fighters from using their own image and likeness rights and taking a significant portion of revenue from merchandise sales. The case was initially dismissed by a judge in 2020, but the fighters appealed the decision and in 2021 the appeals court revived the lawsuit and sent it back to the lower court for further proceedings. On October 1, 2023, Zuffa's appeal to the Ninth Circuit court in its antitrust lawsuit has been denied. On August 9, 2023, U.S. District Judge Richard Boulware granted class action status to more than 1,200 former UFC fighters who competed between December 2010 and June 2017 and are suing for $800 million upward to $1.6 billion in wages, as the lawsuit claims Zuffa had abused its power to suppress UFC fighters' wages. The anti-trust law also permits private plaintiffs to be able to recover three times the damages suffered, meaning the UFC may ultimately pay several billions of dollars' worth of damages. The case has a scheduled April 8, 2024 trial date. On March 20, 2024, TKO, UFC parent company reached an agreement to settle all claims in the class action lawsuits for $335 million where the settlement amount will be deductible for tax purposes. However, on July 31, 2024, Judge Richard Boulware ruled that the case would be heard by a jury and denied the preliminary approval for a settlement and reset a tentative date for trial of October 28. Other lawsuits have also been filed against the UFC, including one by former fighter Leslie Smith, who claimed that the UFC violated federal labor laws by classifying fighters as independent contractors instead of employees. The case was dismissed in 2019, but Smith has appealed the decision. In May 2016, ESPN originally reported that the UFC's parent company Zuffa, LLC was in talks to sell the company for $3.5 billion to $4 billion. In 2015, the UFC had a reported EBITDA of $200–250 million. No official comment was made from the UFC or Dana White regarding the sale. Companies initially interested in the sale were Dalian Wanda Group, China Media Capital, and WME–IMG (Endeavor). On July 9, 2016, it was officially announced that the UFC would be sold to a group led by WME–IMG, its owner Silver Lake Partners, Kohlberg Kravis Roberts, and MSD Capital, for $4.025 billion. At the time, it marked the largest-ever acquisition in sports. Flash Entertainment (owned by the government of Abu Dhabi) retained its 10% minority stake in the company. White, who owned 9% of the UFC, stayed, having been given a stake in the new business. White remained president. Fertitta stepped down as chairman and CEO. WME–IMG was renamed Endeavor in September 2017. Three years into the Endeavor era, White revealed that an undisclosed company bid $5 billion but the Fertittas chose WME–IMG due to a connection they already made with its CEO Ari Emanuel. In October 2016, MMAJunkie obtained a UFC financial report released by Endeavor, detailing that the promotion had reached a year-to-year high of $609 million in revenue during 2015. 76% of the total was credited to "content" revenue, covering media rights, PPV buys and UFC Fight Pass subscriptions; in turn, 42% of content revenue was credited to pay-per-view buys, followed by U.S. and international media rights. In May 2018, UFC reached new U.S. media rights deals with Disney Direct-to-Consumer and International and ESPN Inc., succeeding those with 21st Century Fox, which began in January 2019. The five-year contracts were cumulatively valued at $300 million per-year for digital and linear rights, roughly doubling the amount paid by Fox in the final year of its previous contract, and included 42 events on ESPN platforms per-year. ESPN linear networks televised preliminary cards for UFC PPV events, and 10 UFC on ESPN Fight Night events per-year. The subscription streaming service ESPN+ broadcast 20 exclusive events per-year under the branding UFC on ESPN+ Fight Night; regardless of network, all Fight Night events featured a full, 12-fight card, and their preliminaries aired exclusively on ESPN+. The ESPN+ service also held on-demand rights to UFC library and archive content, new seasons of Dana White's Contender Series, and other new original content. UFC Fight Pass was purchasable as an add-on for ESPN+ to stream pay-per-view events. On March 18, 2019, it was announced that ESPN had reached a two-year extension of the contract. In addition, future UFC PPVs were only sold through ESPN+ to its subscribers, and were no longer be sold via traditional television providers beginning with UFC 236. At the same time, the standard price for UFC PPVs was lowered to $59.99 (from $64.99), and new subscribers were able to purchase a bundle of UFC PPV for a year of ESPN+ too. On July 18, 2018, it was announced that UFC had entered into a partnership with Russian MMA promoter M-1 Global. M-1 Global will serve as a farm league to scout Russian fighters for UFC and will participate in organizing UFC events in Russia. The deal also gave M-1 champions the opportunity to sign with UFC. Due to the COVID-19 pandemic, the UFC went on with its March 13, 2020 event, UFC Fight Night: Lee vs. Oliveira in Brasília, Brazil, behind closed doors. On March 16, the organization announced that the next three events, UFC Fight Night: Woodley vs. Edwards, UFC on ESPN: Ngannou vs. Rozenstruik, and UFC Fight Night: Overeem vs. Harris, would be postponed to future dates. In regards to its next pay-per-view, UFC 249 on April 18, UFC president Dana White stated that the event would likely go on, but at a new venue behind closed doors. It was originally to be held at Barclays Center, but a stay-at-home order was issued by the New York state government. On March 18, the New York State Athletic Commission also withdrew its sanctioning for the event. Due to international travel restrictions and other withdrawals, a revised card for UFC 249 was unveiled on April 6 with a location still TBD. The next day, White disclosed that he had booked an unspecified venue for two months, in order to host both UFC 249 and other future events involving U.S. fighters. He also disclosed plans to secure a private island, known as "Fight Island", to host events with international fighters. The new UFC 249 venue was subsequently revealed to be Tachi Palace—a tribal casino in Lemoore, California; as it is on tribal land, it also fell outside of the jurisdiction of the California State Athletic Commission, meaning that events held there could be self-sanctioned. On April 9, the UFC announced that UFC 249 had been cancelled, and all other UFC events would be suspended until further notice. White cited interventions from high-ranking staff of the UFC's U.S. media rightsholders, ESPN Inc. and parent The Walt Disney Company, as well as Governor Newsom. The New York Post reported that Governor of California Gavin Newsom had contacted Disney chairman and former CEO Bob Iger, urging ESPN and the UFC to not hold the event. Following the decree that professional sports were deemed as "essential services" in Florida, UFC 249 took place on May 9, 2020, at VyStar Veterans Memorial Arena in Jacksonville, Florida with no fans in attendance. Precautionary health and safety measures proposed by the UFC satisfied the Florida State Boxing Commission, which regulates MMA in the state. UFC Fight Night: Smith vs. Teixeira and UFC on ESPN: Overeem vs. Harris were scheduled to take place at the same venue on May 13 and 16, respectively. On Friday, May 8, the UFC announced middleweight fighter Ronaldo Souza was removed from his bout with Uriah Hall at UFC 249 and quarantined after he tested positive for COVID-19, along with his cornermen, despite following the protocols enforced by the UFC. No other athletes or staff tested positive for the disease. In April 2021, amid the COVID-19 pandemic, the UFC held its UFC 261 event, again at the VyStar Arena in Jacksonville, but with a 100-% sold-out capacity, where attendees were not required to wear masks. Public health experts criticized the event, citing the risks to attendees, as well as to the wider community. In March 2021, there was strong pressure on the UFC to use new fighter gloves after a severe eye poke ended the final bout at UFC Fight Night: Edwards vs. Muhammad. The official UFC gloves are constructed in a way that leaves the fighters fingers extended forward, whereas there are alternative gloves, which the UFC has not used, which are curved at the knuckle and keep a fighter's fingers tucked down. Fighters, trainers and commentators called for new gloves, citing the harms posed to fighters from the standard UFC gloves. On April 29, 2021, Endeavor successfully launched an initial public offering (IPO) and became a publicly traded company listed on the New York Stock Exchange. Endeavor subsequently used some of the proceeds from the IPO to buy out Zuffa's other shareholders at a value of $1.7 billion, making Zuffa a wholly owned subsidiary of Endeavor. On November 5, 2022, controversy arose when the call for a sports betting fraud investigation was made on a fight involving Darrick Minner a student of James Krause, who is a UFC coach and avid bettor, and Shayilan Nuerdanbieke at UFC Fight Night: Rodriguez vs. Lemos. The UFC was informed by sources that suspicious betting patterns had been observed on the fight. Minner became a large betting underdog just hours before the fight, and the cause of the suspicion came when Minner threw a kick with an apparently injured leg, then kicked with it again after showing signs of injury before being finished by technical knockout shortly thereafter. On November 6, the UFC released a statement that its official betting partner would look into the matter, but that none of the fighters, coaches, or officials related to the fight were suspected of any wrongdoing. On November 18, the Nevada State Athletic Commission informed the UFC and Krause that Krause's license was suspended and would remain so during the course of the investigation. The UFC then announced that any fighter who chose to continue to be coached by Krause or who continued to train in his gym, would not be permitted to participate in UFC events pending the outcome of the aforementioned government investigations. Following the controversy, UFC introduced rules that banned athletes, coaches, and their close family from betting on UFC events. On September 12, 2023, Endeavor merged with professional wrestling promotion WWE to form a new publicly traded company under the stock symbol "TKO", overseen by Endeavor's CEO Ari Emanuel. WWE's shareholders held a 49% stake in the new company, with Vince McMahon serving as an executive chairman before resigning on January 26, 2024, after Janel Grant, a former WWE employee, filed a lawsuit against McMahon for sex trafficking and sexual assault; the merger agreement valued UFC at $12.1 billion. White continued to serve as the CEO for UFC, with his role remaining the same as during the Endeavor period. On June 6, 2025, the UFC announced the creation of UFC Brazilian Jiu-Jitsu (UFC BJJ), a sister submission grappling promotion company described by the UFC as "the world’s new premier Brazilian Jiu-Jitsu live event series". The promotion held its inaugural event, UFC BJJ 1: Musumeci vs. Gabriel, on June 25, 2025, as part of UFC 317 International Fight Week. During the build-up to UFC BJJ 1, the UFC BJJ: Road to the Title reality web television series aired daily on YouTube. On August 11, 2025, UFC announced a seven-year, $7.7 billion media rights agreement with Paramount Skydance; the agreement will see all UFC events stream exclusively on Paramount+ in the United States, including 13 numbered events and 30 UFC Fight Night cards per-year. Under the agreement, UFC will move away from the pay-per-view model for numbered events: they will stream at no additional charge to Paramount+ subscribers, and it was stated that "selected" numbered events would also be carried by the CBS broadcast network. TKO Group CEO Mark Shapiro described the PPV model as "outdated"; while the exact number of events on broadcast television has not been determined, Shapiro did not rule out that all numbered events could be aired by CBS. Contrarily, White did not rule out "one-off" PPV events in a hypothetical scenario. The contract is one of the first major new rights agreements reached by the company since its acquisition by Skydance Media. On October 28, 2025, UFC and Paramount Skydance announced that all UFC events would also stream exclusively on Paramount+ in Latin America, while Australia would exclusively get all UFC Fight Nights and preliminary matches for the numbered events on their version of the service, as the main card rights are held by Foxtel. Facilities The UFC Apex is a live events and production facility. The facility was officially opened on June 18, 2019. In the wake of the COVID-19 pandemic, several UFC events (including UFC 250) were held at Apex behind closed doors. The Octagon at the Apex is notable for being smaller than the Octagon used at all other UFC events, with 25-foot width rather than the usual 30-feet. The UFC Performance Institute is the official mixed martial arts school for UFC. The building is located in Las Vegas, Nevada opposite the UFC Apex. The institute was opened in 2017, and is the world's first mixed martial arts center for innovation, research and training. As many as 400 MMA athletes have visited the center, as well as NFL, NBA, NHL and MLB athletes. In June 2019, a second facility was opened in Shanghai, China. In 2021, UFC was named the official "high performance advisor" of the Chinese Olympic Committee (COC), under which the Performance Institute in Shanghai would be designated as an official high performance training facility of the COC, and would offer access to its resources for Chinese athletes training to compete in the Olympic Games. In February 2024, the third Performance Institute was opened in Mexico City, Mexico. Drug policy efforts During the early years of mixed martial arts, when Pride Fighting Championships along with the Ultimate Fighting Championship were early premierships of the sport, it has been documented that there was a noteworthy lack of rules and regulations regarding drug testing for performance-enhancing drugs. This led to a widespread debate and discussion regarding how prevalent the use of steroids were in the sport, as well as a long list of competitors in the UFC and other major organizations facing failed drug tests. This was further highlighted by continued problems with UFC champions, including Jon Jones and Anderson Silva, failing drug tests. So in February 2015, UFC announced a more aggressive year round, random-testing approach for its competitors to begin in July 2015. UFC announced a partnership with United States Anti-Doping Agency (USADA) on June 3, 2015, as the UFC's official, independent anti-doping agency. The UFC USADA testing program became effective on July 1, 2015, and includes a minimum of 2,750 drug tests per year with an average of five tests per fighter, and punishments for fighters who fail the tests. Under the UFC Anti-Doping Policy, fighters are subject to random tests at any time and place on all in- and out-of-competition blood and urine samples collected by USADA. Fighters must participate in the testing pool for at least six months prior to a fight in order to qualify for a UFC event. In February 2017, UFC made changes to the anti-doping policy, effective April 1, 2017, as follows: (1) Fighters who are new to the UFC with no previous contract would be subject to a one-month testing rule. The same rule applies to returning fighters who were terminated or whose contracts were not renewed at the decision of the UFC. Previously, returning or terminated fighters were required to undergo four months of testings prior to competing in a fight. (2) Returning fighters who have chosen to retire, go on hiatus, or had a non-renewal of their contract, are required to be in a six-month testing pool prior to competition. (3) No doping violation is handed down to newly signed UFC fighters who voluntarily disclose the use of a prohibited substance prior to testing. (4) "In-competition" testing begins at noon on the weigh-in day and ends one hour after a fighter clears a post-fight medical for non-selected post-fight testing. For fighters who are subjected to post-fight testing the in-competition testing ends after any post-fight testing is done. In September 2018, it was indicated no announcements would be made on fighters who have been flagged for a potential doping violation until the entire adjudication processes are conducted with the results of the potential doping violation. This came after several cases of fighters, such as Anderson Silva, Junior dos Santos, Josh Barnett and Cris Cyborg, being flagged for potential doping violations, but cleared after they were proved of unintentional use of performance enhancing drugs (usually in the form of contaminated supplements). On November 25, 2019, news surfaced that the UFC and USADA had revised their policies, providing a list of certified supplements that will not lead to sanctions should contaminated samples occur. In January 2021, USADA announced that marijuana would no longer be included in the list of banned substances and they would not penalize any fighter for testing positive for it either before, during, or after a fight. The only exception would be if a fighter was visibly impaired on fight night. Fighters are subject to be suspended up to four years depending on the banned substance used. The common banned substances detected by USADA from suspended fighters are 7-keto-DHEA for weight loss, Anastrozole for estrogen blocker, Clenbuterol for thinning blood to increase oxygen, EPO for stimulating the production of red blood cells which would increase oxygen to muscles, Higenamine for increase heart contraction and speeding up heart rate, Tamoxifen for estrogen blocker, Furosemide, Hydrochlorothiazide for diuretic agent to mask potential doping evidence, Meldonium for stimulating the production of red blood cells which would increase oxygen to muscles, Cocaine, Fentanyl for substances of abuse, Boldenone, Turinabol- (steroid for horses), Drostanolone, hGH, Ibutamoren, Ipamorelin, LGD-4033, Metandienone, Ostarine, Stanozolol, Trenbolone for increased muscle mass and strength, Androstenedione, Androsta, Clomiphene, Dehydrochloromethyltestosterone, and Testosterone for increased testosterone. In 2015, USADA conducted 353 tests and 2291 tests in 2016 on 586 UFC fighters with Anderson Silva tested the most of a total of 15 times. In 2017 and 2018 a total of 2818 and 2888 tests were conducted by USADA respectively. As of May 16, 2019, a total of 76 UFC fighters had been sanctioned by USADA since the UFC USADA testing program started. On October 11, 2023, USADA announced that its partnership with the UFC would end on January 1, 2024. With the UFC's partnership with USADA coming to an end in 2023, the UFC announced a new partnership with Drug Free Sport International, the same company that oversees the anti-doping programs of the NCAA, MLB, NFL, and NBA. The administration of the UFC Anti-Doping Program, including sanctioning decisions, will be handled exclusively and independently by Combat Sports Anti-Doping (CSAD), where the former FBI agent George Piro would serve as the independent administrator of the UFC's anti-doping program. This partnership began in 2024, after their contract with USADA expired on December 31, 2023. The UFC announced that former FBI agent George Piro would serve as the independent administrator of the UFC's anti-doping program. Anti-piracy efforts UFC has been one of the largest and most aggressive spenders among anti-piracy political lobbyists in the United States since the end of the 2000s. One thing in particular that sets them apart from other sports leagues is that, in addition to supporting efforts of stricter piracy laws, they have also on numerous occasions gone after selected individuals in addition to pirate hosting websites. Some of the most notable cases have included, a well publicized lawsuit with Justin.tv in 2011 and a $32 million settlement involving a New York man in 2014. UFC has always maintained the stance that the large amounts of illegal streams of their events causes massive financial losses. In response to having such a stringent stance it has been extremely controversial and has caused a number of debates within the mixed martial arts community on its effectiveness. As a result, the UFC began experimenting on an online subscription model known as UFC Fight Pass in 2014. It is unclear how beneficial the service has been since its emphasis has been largely minimal next to UFC's partnership with Fox and noticeable decline in average PPV buyrates, highlighted by the S&P downgrading Zuffa's credit rating in late 2014. Insurance policy On May 9, 2011, it was announced that UFC would be providing year-round customized insurance coverage for any injury suffered by Strikeforce and UFC independent contractor athletes. The policy covers any injuries that occur during competition, training, and non-training related accidents. The policy was underwritten by Houston-based specialty insurance group HCC Insurance Holdings and went into effect on June 1, 2011. The details of the policy include: An insurance policy is not a first for mixed martial arts or combat sports as a whole. Former promotions such as the International Fight League, offered insurance to its athletes. However Zuffa's policy is the first to cover a large group of combat sport athletes. According to UFC president Dana White, the policy was a goal of the company since Zuffa first purchased the UFC in 2001. In addition UFC chairman and CEO, Lorenzo Fertitta stated that the policy took three years to establish while trying to find possible insurers. Prior to the introduction of this policy, Zuffa provided up to $100,000 for an athlete on each event to cover injuries sustained during competition. However, if an athlete was injured outside of competition they would have to pay for their own medical expenses. Notable incidents where UFC athletes were injured outside of competition include, Impact on MMA regulations The current rules used in the UFC were first established by the New Jersey Athletic Control Board in 2000, in consultation with the UFC and other MMA promotions in the United States. The first UFC event under the new rules was UFC 28, held before Zuffa's takeover. New Jersey's Unified Rules of Mixed Martial Arts has since been established throughout the country by other state athletic commissions, including Nevada and California. The UFC has, however, kept close ties with state commissions, especially the Nevada State Athletic Commission, of which Lorenzo Fertitta is a former board member. Controversies Legal disputes and monopoly accusations In the months following the March 2011 acquisition of rival promotion Strikeforce, rumours began to circulate that a possible investigation by the FTC would take place. These rumours later came to be true when it was officially announced around the end of January 2012 that the FTC had in fact conducted an investigation, and found no wrongdoings regarding the UFC being a monopoly. On December 16, 2014, a class action lawsuit was filed against UFC by fighters Cung Le, Jon Fitch and Nate Quarry. Within a few days, Javier Vazquez and Dennis Hallman filed a second class action. And on December 24, Brandon Vera and Pablo Garza filed a third lawsuit. Shortly after the initial news spreading, UFC quickly responded following the first class action with the statement that, "The UFC will vigorously defend itself and its business practices." This soon led other promoters such as Scott Coker, President of Bellator MMA, expressing an interest in the outcome of the lawsuit, while rejecting his organization as being labeled a "minor league" as was done several times in the initial filing. By the end of December 2014, the UFC made a formal statement stating, "We are proud of the company we have built, confident in our legal position, and intend to prevail in this lawsuit." On February 7, 2015, a fourth lawsuit was filed against the UFC, this one by Mac Danzig and Gabe Ruediger. It was around this time that UFC motioned to move the hearing date from May 7 to March 26, as well as to move the venue from Northern California to Las Vegas, where they are headquartered. A few weeks later, UFC motioned to have the lawsuits dismissed, in four separate documents they claim, "The Complaints' vague and conclusory allegations fall far short of the Supreme Court's requirements in Bell Atlantic Corp. v. Twombly, for pleading specific facts showing a plausible antitrust claim." Shortly thereafter, a fifth lawsuit was added by Kyle Kingsbury and Darren Uyenoyama on March 20, 2015. On April 12, the plaintiff athletes filed an opposition to February's motion to dismiss and transfer. Following the May 7 hearing regarding the motion to change venue, a Californian federal judge granted UFC the motion to change venue to Las Vegas after citing contract agreements from the former employees. As a result of the change of venue to Nevada, UFC was denied its motion to remain a discovery for 15 years of its financial records. This would prompt a debate, especially by MMAFA founder Rob Maysey, on who should have access to the UFC's sensitive information and how that information should be viewed. Both sides have argued for different criteria, so as not to put them at a disadvantage. However, UFC has requested a two-tiered system of confidentiality: confidential and highly confidential. They have stated they feel that Maysey's access to highly confidential information could have an influential impact on him and his role in the MMAFA. Meanwhile, Maysey has openly stated his goal is to represent the fighters and ultimately try to get a reform similar to the Ali Act of 2000. Moving forward to September 25, 2015, due to the gradual nature and complications regarding the lawsuit; UFC requested another dismissal of the case and asked that it be thrown out of Las Vegas federal court. In a surprise bench ruling, this was ultimately denied, which promoted the UFC to release a formal response. The following week, magistrate judge Peggy Leen ruled that the UFC could not prevent plaintiffs attorney Rob Maysey from viewing its most highly confidential and sensitive business and financial information. This has officially caused an expert discovery that is estimated to last from 12 to 16 months (September 2016 to January 2017). In doing so, both parties will have to hand over various highly confidential and sensitive documents. The goal of the expert discovery is to determine three key factors for antitrust liability to all hold true: (1) Does the UFC have monopoly power? (2) Did the UFC acquire or maintain such power through exclusionary conduct? (3) Did the UFC cause antitrust injury since having a monopoly is not always illegal in the United States? This is expected to involve a wide range of important figures (past and present) in both mixed martial arts and boxing, including most top ranked UFC staff, Scott Coker, Bjorn Rebney, Ray Sefo, Frank Shamrock, Fedor Emelianenko, Randy Couture, Ben Askren, Mark Cuban, Oscar De La Hoya, Bob Arum, Lou DiBella, Bob Meyrowitz, Ken Hershman and even various PRIDE FC executives. Following this ruling through the end of 2015, both sides have provided well over 100,000 documents. Starting in January, the UFC defense team filed its official answer, denying the fighters' antitrust claims. In an amended complaint, which contained nearly identical legal and economic substance to the original version from December 2014. The only major difference being the number of plaintiff fighters has declined from eleven to six. Pablo Garza, Gabe Ruediger, Darren Uyenoyama, Dennis Hallman, and Mac Danzig all dropped out of the lawsuit while the original three plaintiffs, Cung Le, Nate Quarry, and Jon Fitch, remain along with Brandon Vera, Javier Vazquez, and Kyle Kingsbury. In addition, UFC has stood by its point of protecting its brand. Additionally, the UFC inadvertently produced PRIDE FC acquisition materials. Following this in October, UFC made a motion to dismiss the consolidated complaint, which was ultimately denied. By this point of the lawsuit, there was considerably less notable coverage of the case. Aside from the occasional legal filings, the first of which being in February 2018 in which the plaintiffs filed a motion for class certification which faced opposition from UFC. Furthered in September, when the plaintiffs filed their opposition to UFC's motion for summary judgment. Before finally on December 5, 2018, when the plaintiffs held an informational session to cover the status of the lawsuit in Las Vegas, Nevada. All of which led to some major breaking news in regards to financial information about UFC being revealed once hearings started taking place in August and September. At this point the case included 12 plaintiffs attorneys, two from Bellator MMA, and two from Top Rank. As they intend to look into the business practices used by UFC throughout the years towards other MMA promotions throughout the 2000s. Who often have placed some level of blame of their demise on UFC. Some of the most notable revelations included: The Ultimate Fighting Championship has been accused of monopolistic business practices both in casual criticism and in formal lawsuits for a number of years. There are numerous fighters who have accused the company of various wrongdoing's regarding issues including unequal pay, predatory actions toward rival promotions, lack of a pension or union safety net, and other perceived unethical business practices. These perceptions have been most highlighted by a Federal Trade Commission investigation that took place between 2011 and 2012. As well as in a series of class action lawsuits filed against the company in late 2014 and early 2015. In July 2024, the parties in the Le v Zuffa and Johnson vs. Zuffa lawsuits had a proposed $335 million settlement rejected by Judge Richard Franklin Boulware II of the United States District Court for the District of Nevada. Subsequently, in September 2024, a new $375 million settlement was proposed. On February 6, 2025, Judge Richard Boulware of Nevada granted final approval for a $375 million settlement in the "Le vs. Zuffa" antitrust lawsuit for monopolistic practices. As part of the settlement, around $240 million to $260 million will be distributed to eligible fighters, specifically those who competed in at least one UFC bout from December 2010 to June 2017. These payments are expected to be made over the next year. Additionally, $40 million from the settlement will be set aside for administrative and legal expenses. A second, related antitrust lawsuit, "Johnson vs. Zuffa", which covers fighters who competed in the UFC from 2017 to the present, remains unresolved and continues to proceed separately. In May 2025, two antitrust lawsuits were filed against the UFC. One, led by former fighter Misha Cirkunov, specifically challenges the enforceability of arbitration clauses and class action waivers in UFC contracts. The other lawsuit, filed by former fighter Phil Davis, alleges that the UFC's anticompetitive practices also negatively impacted the ability of non-UFC fighters to secure fair wages. Relationships with combat sports organizations Throughout the existence of the International Fight League (IFL) between 2006 and 2008, both UFC and the IFL had competed in a hostile relationship. UFC accused the IFL and sued them for illegally using proprietary information obtained by hiring executives from their organization. The IFL responded with their own suit claiming that UFC was threatening potential partners not to work with the IFL, including Fox Sports Net (a deal with Fox Sports was later signed before resolution of the suit). The tension between the IFL and the UFC worsened with accusations that the IFL had attempted to buy out several top UFC fighters. In July 2008, there were reports of the IFL's possible purchase by the UFC. That same month, Joe Favorito, former IFL senior vice president, cited financial troubles for the closing of the company on July 31, 2008. Anonymous sources stated that UFC had bought the IFL. Other reports cited the UFC's airing of IFL footage on its programming, and the signing of previous IFL fighters, as an indirect confirmation of the purchase. On December 11, 2006, the UFC acquired the assets of the World Fighting Alliance, and formed WFA Enterprises, LLC. as a subsidiary to handle these assets, including select fighter contracts. On the same day, it was reported that UFC was formalizing plans to buy World Extreme Cagefighting, to be run as a separate promotion.[needs update] Following the purchase of the World Extreme Cagefighting (WEC), UFC made several changes to the promotion. This included modifying the WEC's cage, transferring to a focus on lighter weight classes, giving it the ability to host events in Las Vegas, and having the championships of fighters who were contracted UFC fighters vacated. From 2007 to the end of 2010, the WEC was run as a separate promotion under the UFC banner, airing events 28 to 53 on Versus in the US and on The Score in Canada. On October 28, 2010, Dana White announced that the WEC would be absorbed into the UFC in early 2011. On March 27, 2007, it was announced that the UFC's Frank Fertitta III and Lorenzo Fertitta were acquiring the assets of Pride Fighting Championships, the UFC's largest rival, from Dream Stage Entertainment. To handle the take over, the Fertitta brothers created a new corporate entity to handle the assets, Pride FC Worldwide Holdings LLC. With common ownership in place, Zuffa and Pride Worldwide would be working closely together. Although goals of reviving Pride were not realized, many of Pride's assets, including contracts with fighters and intellectual property, are now regularly utilized by the UFC. On March 12, 2011, it was announced that the UFC had purchased Strikeforce in a deal made with partial owner Silicon Valley Sports and Entertainment. The amount of money involved has not been officially disclosed, however, it has been reported that the deal was worth $40 million. The deal included licensing rights, fighter contracts, and the Strikeforce video library. Strikeforce continued to operate as a separate company, similar to that of the WEC, until January 12, 2013. After the final show was held in Oklahoma City, the promotion was dissolved and several fighter contracts were absorbed into the UFC. When United Glory was originally formed in 2006, it was known as Ultimate Glory before a lawsuit with UFC forced a name change. In June 2014 the UFC announced that they had signed a multi-year, multi-event broadcast deal to show and archive all Invicta Fighting Championships events on UFC Fight Pass. This has allowed the UFC to further expand its women's divisions by adding a strawweight division in July 2014, and signing Invicta fighters such as Carla Esparza and Felice Herrig. In June 2014 the UFC announced that they had signed a development deal with the recently revived, Vale Tudo Japan. A brand that was brought back in 2012 by the long running, Shooto promotion. The UFC plans on promoting and operating a new tournament series that will focus on 135 and 145 pound divisions. There were plans of a The Ultimate Fighter-like TV show to help promote these tournaments but it is unclear on what the status remains on it. Rules and features The current rules for the Ultimate Fighting Championship were originally established by the New Jersey Athletic Control Board. The set of "Unified Rules of Mixed Martial Arts" that New Jersey established has been adopted in other states that regulate mixed martial arts, including Nevada, Louisiana, and California. These rules are also used by many other promotions within the United States, becoming mandatory for those states that have adopted the rules, and so have become the standard de facto set of rules for professional mixed martial arts across the country. UFC matches vary in maximum length, depending on whether the match is for a championship title, or is a fight card's "main event" fight. In all fights, each round can be no longer than five minutes. Championship fights last for a maximum of five rounds. Beginning with UFC 138 on November 5, 2011, non-championship "main event" fights (i.e. the final fight on the card) will also last for a maximum of five rounds. Non-main event bouts last for a maximum of three rounds. UFC 263 marked the first time in UFC history that a non-title bout other than the main-event was scheduled for 5 rounds. UFC on FX: Alves vs. Kampmann featured the organization's first two flyweight fights as part of its first flyweight tournament, which consists of bouts that, in the event of a draw, go to a fourth "sudden victory" round held to determine the winner, who advances. There is a one-minute rest period between rounds. The UFC stages bouts in an eight-sided enclosure officially named "The Octagon". Originally, SEG trademarked the concept as well as the term and prevented other mixed martial arts promotions from using the same type of cage, but in 2001 Zuffa gave permission for other promotions to use octagonal cages, reasoning that the young sport needed uniformity to continue to win official sanctioning. Today Zuffa reserves exclusive use of the name "The Octagon". The UFC cage is an octagonal structure with walls of metal chain-link fence coated with black vinyl. The standard octagon has a diameter of 30 ft (9.1 m) with a 6 ft (1.8 m) high fence. The cage sits atop a platform, raising it 4 ft (1.2 m) from the ground. It has foam padding around the top of the fence and between each of the eight sections. It also has two entry-exit gates opposite each other. The mat (also referred to as the canvas), painted with sponsorship logos and art, is replaced for each event. For smaller venues and events, the UFC often uses a smaller cage, which is only 25 ft (7.6 m) across. All competitors fight in approved shorts, without shoes. Tops are only approved for female competitors. Required safety equipment include padded gloves, mouthguard, and protective cups held in place with a jockstrap for males. The open-fingered gloves have at least 1" of padding around the knuckles, (110 to 170 g / 4 to 6 ounces) that allow fingers to grab. To ensure compliance, fighters are checked by a state athletic committee official before being allowed to enter the cage/ring. Originally the attire for UFC was very open. Many fighters still chose to wear tight-fitting shorts or boxing-type trunks, while others wore long pants or singlets. Several wore wrestling shoes. Multi-time tournament champion Royce Gracie wore a Brazilian jiu-jitsu gi in all of his early appearances in UFC (Gracie wore shorts against Matt Hughes at UFC 60), while Art Jimmerson appeared in UFC 1 wearing one standard boxing glove. As of UFC 133 there has been a ban on speedo style shorts after Dennis Hallman wore one in his fight against Brian Ebersole. UFC president Dana White was so furious about the fighter's choice of attire that he awarded an honorary "getting those horrifying shorts off TV as soon as possible" bonus of $70,000 to Ebersole for finishing the fight in the first round, and in following post-fight interviews made it clear that speedo style shorts will no longer be tolerated. On December 2, 2014, the UFC and Reebok held a press conference to announce an exclusive deal for Reebok to become the worldwide outfitter for the UFC, beginning in July 2015. Financial terms of the six-year partnership were not released, but UFC officials said that though the agreement represents the most valuable non-broadcast contract the company has ever signed, the UFC will not directly profit from the new deal. Instead, company execs said the deal is structured so that the "vast majority of the revenue" from the deal – taking out only the costs associated with administering the new program – will be paid directly to UFC fighters. Payment on the new deal was originally expected to be based on the fighter's spot in the official UFC rankings, with the exception of the UFC champions. Fighters ranked No. 1 to 5 would be paid at one level, No. 6 to 10 at a lower level, No. 11 to 15 below that, and unranked fighters at a base rate. The payments would remain consistent regardless of where the athletes' bouts air. In addition to the per-fight rate, fighters would also receive royalty payments representing 20 percent of any UFC merchandise sold that bears their likeness. The royalty program would also include retired fighters and continue in perpetuity. The deal itself was reported to be worth 70 million dollars which was what the fighters would be paid over the next six years which is roughly 260 thousand dollars per UFC fight card. In April 2015, the UFC announced that they scrapped the idea of the ranking and that payment will be based on the fighter's number of bouts in the octagon, with different tiers (1–5 fights, 6–10 fights, 11–15 fights, and 16–20 fights). Exceptions are made in the event of title fights, with champions and title challengers receiving greater compensation. The kits were revealed on June 30, 2015. All kits feature the fighter's name on the back of the jersey and fighters have the option to choose between a universal kit or a country kit, related to their nationality. There is also a champion kit, designed to be used only by title holders. The new deal meant that beginning with fight week for UFC 189 in Las Vegas, existing sponsors no longer appear on fighter clothing – not only on fight night but also at all pre-fight media appearances – and in-cage sponsor banners have also eliminated. Fighter camps are outfitted with approved clothing to create a uniform look in athletes' corners. Existing sponsors are still welcome to support UFC fighters. However, third-party logos are no longer allowed on UFC broadcasts, other than title-sponsor slots – similar to those seen with European soccer clubs – that the UFC may eventually sell to "a major, global brand" down the road. On July 11, 2020, UFC announced Venum as the exclusive outfitting partner from April 2021: UFC on ABC: Vettori vs. Holland was the first event with Venum outfits. UFC announced in October 2021, that Avex Brasil, local producer of Venum brand apparel, has been named the exclusive manufacturer and distributor of UFC Replica Fight Kits and Fight Week apparel sold through retailers in Brazil. Under the terms of the agreement, Avex Brasil will manufacture officially licensed UFC replica fight kits and fight week apparel for men and women and distribute the product through the country. On April 12, 2024, UFC announced a new glove where changes were made to reduce hand injuries and eye pokes (every 14 fights with an average delay of 50 seconds), while maintaining dexterity and not affecting performance. The new gloves were already tested during the ten weeks of the Dana White's Contender Series 2023 and gloves will be used starting June 2024. New features of the gloves include: (1) a wristband locking system to prevent grabbing of the gloves; (2) all seams are now on the palm side with a lack of seams on top of the hands to minimize abrasions and cuts; (3) removal of finger binding that allows the hand to close maturely to reduce eyes pokes, abrasions, and cuts; (4) padding to the sides of the index and pinky finger of the glove to protect bone; (5) ergonomic curved wristband for better fit around the wrist scooped or angled finger holes to eliminate bunching on the inside of the fisted hand lining; (6) and thicker foam padding for maximum flexibility and protection with an updated law profile hook and loop that minimizes snag and reduces weight; they have an authentication and data chip which allows the UFC to identify a pair of gloves to a fighter in a specific fight. The gloves come in XXXS to XXXXL sizes with weight lighter by 1 to 1.5 ounces compared to the previous gloves; the new glove weighs between 3 and 4.9 oz. New gloves include five different glove colors: gun-metal gloves will be used for traditional UFC fights; gold gloves with an octagon trim for championship fights and main event bouts; black gloves for "The Ultimate Fighter"; blue gloves for Dana White's Contender Series; and red gloves for Road to the UFC tournaments. On November 12, it was reported that the UFC had notified fighters competing in upcoming events, starting from UFC 309, that the organization will reintroduce its previous glove design, which had been replaced at UFC 302 in June. UFC president Dana White cited frequent complaints from fighters as being the reason for the change, even though the new design had only been in use for six months. Matches may end via: In the event of a draw, it is not necessary that the fighters' total points be equal (see, e.g., UFC 41 Penn vs. Uno, or UFC 43 Freeman vs. White). However, in a unanimous or split draw, each fighter does score an equal number of win judgments from the three judges (0 or 1, respectively). Additionally, if a title fight ends in a draw, the defending champ retains the title. The ten-point must system is in effect for all UFC fights; three judges score each round and the winner of each receives ten points while the loser receives nine points or fewer (although 10–10 rounds are given in the rare event that a judge feels the rounds was too close to warrant giving one fighter 10 and the other 9.) Scores of 10–8 are typically awarded for dominant rounds and anything more dominant is scored less. 10–7 rounds are very rare, with only five known instances in UFC history—if a round is lopsided enough that a 10–7 score would be justified, the referee will usually declare a technical knockout and stop the fight as a safety precaution. The Nevada State Athletic Commission currently lists the following as fouls: When a foul is charged, the referee, in their discretion, may deduct one or more points as a penalty. If a foul incapacitates a fighter, then the match may end in a disqualification if the foul was intentional, or a no contest if unintentional. If a foul causes a fighter to be unable to continue later in the bout, it ends with a technical decision win to the injured fighter if the injured fighter is ahead on points, otherwise it is a technical draw. Fights that occur on The Ultimate Fighter are classified as exhibition matches under NSAC sanctioning, and thus do not count toward a fighter's professional record. Match outcomes also do not need to be immediately posted publicly, which allows for fight results to remain unknown to the public until the airdate of the episode. For two-round matches, if there is a draw after two rounds, an extra five-minute round ("sudden victory") is contested. If the extra round concludes without a stoppage, the judges' decision will be based on that final round. These exhibition matches variably have two or three rounds, depending on the rules used for each season. In most seasons, preliminary matches (before the semi-final bouts) were two rounds; in season two, all matches had three rounds. All matches past the first round use three rounds as per standard UFC bouts. During the finales for each series, the division finals have the standard three rounds, plus a fourth round if the judges score a tie.[citation needed] Weight divisions and current champions The UFC currently uses nine weight classes: Updated as of February 1, 2026, after UFC 325. Non-title fights have a one-pound leniency. In title fights, the participants must weigh no more than that permitted for the relevant weight division. The Commission may also approve catch weight bouts, subject to their review and discretion. For example, the Commission may still decide to allow the contest the maximum weight allowed is 177 pounds if it feels that the contest would still be fair, safe, and competitive. In addition, there are five weight classes specified in the Unified Rules which the UFC does not currently use: Super Lightweight (165 pounds), Super Welterweight (175 pounds), Super Middleweight (195 pounds), Cruiserweight (225 pounds), and Super Heavyweight (>265 pounds). Roster As of October 20, 2020, the UFC roster consisted of fighters from 71 countries. As of June 14, 2025, there are 596 fighters on the UFC roster, a plurality of which, 207 or 35%, are American. Despite having the largest pool of fighters, there are no male American champions in the UFC as of June 22, 2025. UFC fighters are paid a substantially lower share of revenue than athletes in comparable sports, and other large MMA promotions. UFC fighters are paid per fight, with amounts depending on how well-known the fighters are and how well sponsored a fighter and an event is. Fighters will typically get paid money to fight, called show money, with an additional bonus if they win, called a win bonus. Despite not being officially confirmed by the UFC, Justin Gaethje revealed in January 2019 that headlining an event nets an additional $25,000 per fighter. While fighters new to the UFC can make as little as about $10,000 per fight (without a win bonus), more established fighters have made as much as $500,000 to $1 million per fight. Occasionally, fighters will earn more. For example, at UFC 202, Conor McGregor made a reported $3 million, a UFC record for one fight, while his opponent Nate Diaz made a reported $2 million. The combined $5 million made between the fighters was the largest combined fight purse in UFC history. Cash bonuses are also awarded for "Fight of the Night" and "Performance of the Night" (formerly awarded separately as "Knockout of the Night"). The size of these bonuses can sometimes be US$80,000 (but are normally US$50,000). For less well-known fighters, they can be several times larger than the contracted amount for the fight. Contracted amounts generally have to be declared to the state athletic commission; however, the UFC also pays undisclosed locker-room bonuses to fighters. In early 2021, Dana White revealed that these bonuses vary from $4,000 to $25,000. In recent years, UFC fighters' contracts and merchandising rights have been the subject of dispute between fighters (represented by growing the Mixed Martial Arts Fighters Association) and UFC, which has attempted to defend existing regulations. UFC is contractually bound to offer every fighter three fights per calendar year and if they don't, the organization has to pay the fighter for the lacking fights. For example, if the UFC offers a fighter only one fight during the year, they have to pay the fighter for two additional fights. However, if a fight is offered but turned down by the fighter, it is still counted as an offered fight from the contractual viewpoint. Starting at UFC 273, three "Fan Bonus Of The Night", for every pay-per-view event, were awarded by Crypto.com, as part of Crypto.com UFC sponsorship incentive fight kits deal, for every pay-per-view event starting UFC 273. Viewers vote up to three times per pay-per-view on Crypto.com/FanBonus, starting from the opening of the PPV preliminary card and ending an hour after the conclusion of the main card. The bonuses are paid in bitcoin in US dollars ranging from US$30,000 for first place, US$20,000 for second place, and US$10,000 for third place. From 2023, the times these awards were given less frequent and not for every pay-per-view for unknown reasons. Fighters are allowed to compete outside of the promotion in non-striking sports such as Brazilian jiu-jitsu and wrestling, provided they do not have a scheduled UFC bout within eight weeks of the competition. UFC rankings As of January 27, 2020, it was announced through Twitter by Bruno Massami that the UFC has decided to separate its pound-for-pound ranking. Men and women will have their own pound-for-pound rankings. Rankings updated on February 10, 2026, after UFC Fight Night: Bautista vs. Oliveira. Rankings updated on February 10, 2026, after UFC Fight Night: Bautista vs. Oliveira. UFC events MMA journalists and fans have criticized the UFC for putting on too many shows and thus diluting the quality of their product. Comedian, Brazilian jiu-jitsu and Taekwondo black belt Joe Rogan teams up with play-by-play announcer Jon Anik, UFC Hall of Famer Daniel Cormier and Megan Olivi to provide commentary during broadcasts of most UFC events in the US. For 20 years[c] Rogan and Mike Goldberg provided commentary at live events. The "Veteran Voice of the Octagon" is announcer Bruce Buffer. Arianny Celeste, Rachelle Leah, Brittney Palmer, Carly Baker, Vanessa Hanson, Chrissy Blair, Jhenny Andrade, Camila Oliveira, Luciana Andrade, Jamilette Gaxiola, and Red Dela Cruz are Octagon girls. Each fighter is assigned a cutman by the promotion who cares for the fighter before the fight and in between rounds. Jacob "Stitch" Duran was one of the best known cutmen working for the organization. Matches are made by matchmakers, and VP of Talent Relations, Joe Silva and Sean Shelby. UFC records UFC Hall of Fame Media In January 2007, Zuffa and video game developer/publisher THQ announced a license agreement giving THQ worldwide rights to develop titles under the UFC brand. The agreement gives THQ exclusive rights to current and next-generation consoles as well as to PC and handheld titles. Also included are "certain wireless rights" which were not detailed. The licensing agreement was set to expire in 2011, although it appeared to have been extended to 2017. On June 4, 2012, THQ announced they will be giving the license of UFC Undisputed to EA. The first UFC action figure collectibles were released by Round 5 Corporation in May 2008. Series one of their figures includes Quinton "Rampage" Jackson, Matt Hughes, Tito Ortiz, and Randy Couture. Series two (released on November 10, 2008) includes Wanderlei Silva, Sean Sherk, Rich Franklin, and Anderson Silva. In July 2009, Round 5 acquired the UFC license through Jakks Pacific and subsequently released five more series under the UFC and Pride brands. Two packs were released in August 2010 and include a UFC Octagon cage and Pride ring display stand. Limited edition versions include fabric walk-out tees or paint variations and are limited in number with foil and holographic packaging variances. Special edition and exclusive versions have been released at various UFC Fan Expo events. On June 10, 2008, it was announced that UFC had signed an exclusive four-year contract with Jakks Pacific to create action figures for UFC. As of 2009[update] the schedule envisages the release of these figures in November 2009. They have currently been 8 series released and they feature special Legends, Pride, and WEC style figures as well. Three 2 packs series have also been released, as well as several expo and internet exclusives. There are also several different octagon cage playsets that have been released, including the "Octagon Playset", "Official Scale Octagon Playset", and "Electronic Reaction Octagon Playset". A Pridestyle ring playset was also originally planned; however, no news have been given on its status or release date since then. In 2020, the UFC and toy company Jazwares entered into an agreement to release a new line of UFC action figures. The first wave of Jazwares' UFC figures were scheduled to be released in Fall 2020. Various UFC events have been released onto DVD. UFC 23 through UFC 29 were not released in the US on home video or DVD by SEG. They have since been released onto boxsets which feature around 10 events each set, in chronological order. UFC on-demand content launched for Xbox 360 on December 20, 2011. Subscribers were able to view pay-per-view events in high definition, connect with friends to predict fight results, and have the ability to compare fighter statistics and records. The UFC Fight Pass application was also planned for PlayStation 4 in early 2015. In 2015, UFC Fight Pass became available on the Xbox One. In December 2022, a PlayStation version of the app was released. In August 2021, the UFC began to release NFTs to commemorate big fights, milestones and moments via their official trading card partner, Panini America. International broadcasters The UFC's PPV events are broadcast live on pay-per-view in the US and TNT Sports Box Office in the United Kingdom. In the UK; BT Sport's first ever live event was August 3, 2013 UFC 163 headlined by José Aldo and The Korean Zombie. BT Sport were the first major broadcaster in the UK for the UFC where previously they had small coverage on Bravo, Setanta Sports and finally ESPN UK in August, 2012 until the BT Sport deal was in place. As of August 2025, TNT Sports, the successor of BT Sport, holds exclusive rights to UFC in the United Kingdom. Events are broadcast live on Fighting Sports Network in Pay TV (Cable and Satellite) of SKY Satellite. Free TV Channels in Mexico, Fox Sports and Fox Premium in Pay TV (Cable and Satellite) Central America are broadcast with tape-delay. In Brazil, events are broadcast live on open television through Rede Bandeirantes, which transmits the Fight Night events and preliminary cards of main events, while the numbered events are on Fight Pass. Previously, Rede Globo broadcast it on its own martial arts channel Combate from 2011 to 2022, with select events on its broadcast network. In Southeast Asia (exclude the Philippines), Hong Kong, and Papua New Guinea, UFC events are broadcast on Fox Movies Premium (2012–2013) and Fox Sports (2013–2021). In India, events are broadcast on Sony Ten 2, Sony Ten 1, Sony Ten 1 HD and Sony Ten 2 HD. In the Philippines, UFC was also aired on Balls (now ABS-CBN Sports + Action HD) from 2009 until 2015, since moved to Sports5 (including TV5, AksyonTV and Hyper on Channel 91 (SD) and 261 (HD) via Cignal) starting January 3, 2016 until December 31, 2018, and is currently airing on TAP Digital Media Ventures Corporation-owned sports cable television channel Premier Sports since October 2021. In Sri Lanka, UFC events have been broadcast on several television networks over the years. Previously, UFC events were aired on various channels from 2012 to 2017, including Dialog TV and PEO TV. Starting January 15, 2018, Sony Sports Ten 2 became the primary broadcaster for UFC events in Sri Lanka, airing the events in English. Additionally, UFC events have been available via UFC Fight Pass, which offers live streaming of events and on-demand content for viewers in Sri Lanka. In Indonesia, UFC events are currently broadcast on tvOne starting January 15, 2018; previously, this events was also broadcast on RCTI, iNews since 2012 until the end of 2017. On April 13, 2019, UFC's event was broadcast on Abu Dhabi Media. In Poland since 2018 the official broadcaster of UFC it's Polsat Sport. Previously the UFC events in this nation are broadcast by Orange Sport and Extreme Sports Channel. The main Polish broadcasters of UFC telecasts, are Andrzej Janisz and Łukasz "Juras" Jurkowski. In 2024, Rogers successfully bid for the rights to broadcast UFC in Canada on its Sportsnet channels. The UFC was previously on Sportsnet and French broadcaster TVA from September 2011 through the end of 2014 in Canada. In Russian, UFC events are broadcast on Match TV, a Russian sports channel owned by Gazprom Media, starting 2022. See also Notes References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Extraterrestrial_life#cite_note-Anaxagoras-135] | [TOKENS: 11349] |
Contents Extraterrestrial life Extraterrestrial life, or alien life (colloquially aliens), is life that originates from another world rather than on Earth. No extraterrestrial life has yet been scientifically or conclusively detected. Such life might range from simple forms such as prokaryotes to intelligent beings, possibly bringing forth civilizations that might be far more, or far less, advanced than humans. The Drake equation speculates about the existence of sapient life elsewhere in the universe. The science of extraterrestrial life is known as astrobiology. Speculation about inhabited worlds beyond Earth dates back to antiquity. Early Christian writers, including Augustine, discussed ideas from thinkers like Democritus and Epicurus about countless worlds in the vast universe. Pre-modern writers typically assumed extraterrestrial "worlds" were inhabited by living beings. William Vorilong, in the 15th century, acknowledged the possibility Jesus could have visited extraterrestrial worlds to redeem their inhabitants.: 26 In 1440, Nicholas of Cusa suggested Earth is a "brilliant star"; he theorized that all celestial bodies, even the Sun, could host life. Descartes wrote that there were no means to prove the stars were not inhabited by "intelligent creatures", but their existence was a matter of speculation.: 67 In comparison to the life-abundant Earth, the vast majority of intrasolar and extrasolar planets and moons have harsh surface conditions and disparate atmospheric chemistry, or lack an atmosphere. However, there are many extreme and chemically harsh ecosystems on Earth that do support forms of life and are often hypothesized to be the origin of life on Earth. Examples include life surrounding hydrothermal vents, acidic hot springs, and volcanic lakes, as well as halophiles and the deep biosphere. Since the mid-20th century, researchers have searched for extraterrestrial life and intelligence. Solar system studies focus on Venus, Mars, Europa, and Titan, while exoplanet discoveries now total 6,022 confirmed planets in 4,490 systems as of October 2025. Depending on the category of search, methods range from analysis of telescope and specimen data to radios used to detect and transmit interstellar communication. Interstellar travel remains largely hypothetical, with only the Voyager 1 and Voyager 2 probes confirmed to have entered the interstellar medium. The concept of extraterrestrial life, especially intelligent life, has greatly influenced culture and fiction. A key debate centers on contacting extraterrestrial intelligence: some advocate active attempts, while others warn it could be risky, given human history of exploiting other societies. Context Initially, after the Big Bang, the universe was too hot to allow life. It is estimated that the temperature of the universe was around 10 billion Kelvin at the one-second mark. Roughly 15 million years later, it cooled to temperate levels, though the elements of organic life were yet nonexistent. The only freely available elements at that point were hydrogen and helium. Carbon and oxygen (and later, water) would not appear until 50 million years later, created through stellar fusion. At that point, the difficulty for life to appear was not the temperature, but the scarcity of free heavy elements. Planetary systems emerged, and the first organic compounds may have formed in the protoplanetary disk of dust grains that would eventually create rocky planets like Earth. Although Earth was in a molten state after its birth and may have burned any organics that fell on it, it would have been more receptive once it cooled down. Once the right conditions on Earth were met, life started by a chemical process known as abiogenesis. Alternatively, life may have formed less frequently, then spread—by meteoroids, for example—between habitable planets in a process called panspermia. During most of its stellar evolution, stars combine hydrogen nuclei to make helium nuclei by stellar fusion, and the comparatively lighter weight of helium allows the star to release the extra energy. The process continues until the star uses all of its available fuel, with the speed of consumption being related to the size of the star. During its last stages, stars start combining helium nuclei to form carbon nuclei. The larger stars can further combine carbon nuclei to create oxygen and silicon, oxygen into neon and sulfur, and so on until iron. Ultimately, the star blows much of its content back into the stellar medium, where it would join clouds that would eventually become new generations of stars and planets. Many of those materials are the raw components of life on Earth. As this process takes place in all the universe, said materials are ubiquitous in the cosmos and not a rarity from the Solar System. Earth is a planet in the Solar System, a planetary system formed by a star at the center, the Sun, and the objects that orbit it: other planets, moons, asteroids, and comets. The sun is part of the Milky Way, a galaxy. The Milky Way is part of the Local Group, a galaxy group that is in turn part of the Laniakea Supercluster. The universe is composed of all similar structures in existence. The immense distances between celestial objects are a difficulty for studying extraterrestrial life. So far, humans have only set foot on the Moon and sent robotic probes to other planets and moons in the Solar System. Although probes can withstand conditions that may be lethal to humans, the distances cause time delays: the New Horizons took nine years after launch to reach Pluto. No probe has ever reached extrasolar planetary systems. The Voyager 2 left the Solar System at a speed of 50,000 kilometers per hour; if it headed towards the Alpha Centauri system, the closest one to Earth at 4.4 light years, it would reach it in 100,000 years. Under current technology, such systems can only be studied by telescopes, which have limitations. It is estimated that dark matter has a larger amount of combined matter than stars and gas clouds, but as it plays no role in the stellar evolution of stars and planets, it is usually not taken into account by astrobiology. There is an area around a star, the circumstellar habitable zone or "Goldilocks zone", wherein water may be at the right temperature to exist in liquid form at a planetary surface. This area is neither too close to the star, where water would become steam, nor too far away, where water would be frozen as ice. However, although useful as an approximation, planetary habitability is complex and defined by several factors. Being in the habitable zone is not enough for a planet to be habitable, not even to actually have such liquid water. Venus is located in the solar system's habitable zone, but does not have liquid water because of the conditions of its atmosphere. Jovian planets or gas giants are not considered habitable even if they orbit close enough to their stars as hot Jupiters, due to crushing atmospheric pressures. The actual distances for the habitable zones vary according to the type of star, and even the solar activity of each specific star influences the local habitability. The type of star also defines the time the habitable zone will exist, as its presence and limits will change along with the star's stellar evolution. The Big Bang occurred 13.8 billion years ago, the Solar System was formed 4.6 billion years ago, and the first hominids appeared 6 million years ago. Life on other planets may have started, evolved, given birth to extraterrestrial intelligences, and perhaps even faced a planetary extinction event millions or billions of years ago. When considered from a cosmic perspective, the brief times of existence of Earth's species may suggest that extraterrestrial life may be equally fleeting under such a scale. During a period of about 7 million years, from about 10 to 17 million years after the Big Bang, the background temperature was between 373 and 273 K (100 and 0 °C; 212 and 32 °F), allowing the possibility of liquid water if any planets existed. Avi Loeb (2014) speculated that primitive life might in principle have appeared during this window, which he called "the Habitable Epoch of the Early Universe". Life on Earth is quite ubiquitous across the planet and has adapted over time to almost all the available environments in it, extremophiles and the deep biosphere thrive at even the most hostile ones. As a result, it is inferred that life in other celestial bodies may be equally adaptive. However, the origin of life is unrelated to its ease of adaptation and may have stricter requirements. A celestial body may not have any life on it, even if it were habitable. Likelihood of existence Life in the cosmos beyond Earth has been observed. The hypothesis of ubiquitous extraterrestrial life relies on three main ideas. The first one, the size of the universe, allows for plenty of planets to have a similar habitability to Earth, and the age of the universe gives enough time for a long process analog to the history of Earth to happen there. The second is that the substances that make life, such as carbon and water, are ubiquitous in the universe. The third is that the physical laws are universal, which means that the forces that would facilitate or prevent the existence of life would be the same ones as on Earth. According to this argument, made by scientists such as Carl Sagan and Stephen Hawking, it would be improbable for life not to exist somewhere else other than Earth. This argument is embodied in the Copernican principle, which states that Earth does not occupy a unique position in the Universe, and the mediocrity principle, which states that there is nothing special about life on Earth. Other authors consider instead that life in the cosmos, or at least multicellular life, may actually be rare. The Rare Earth hypothesis maintains that life on Earth is possible because of a series of factors that range from the location in the galaxy and the configuration of the Solar System to local characteristics of the planet, and that it is unlikely that another planet simultaneously meets all such requirements. The proponents of this hypothesis consider that very little evidence suggests the existence of extraterrestrial life and that, at this point, it is just a desired result and not a reasonable scientific explanation for any gathered data. In 1961, astronomer and astrophysicist Frank Drake devised the Drake equation as a way to stimulate scientific dialogue at a meeting on the search for extraterrestrial intelligence (SETI). The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. The Drake equation is:: xix where: and Drake's proposed estimates are as follows, but numbers on the right side of the equation are agreed as speculative and open to substitution: 10,000 = 5 ⋅ 0.5 ⋅ 2 ⋅ 1 ⋅ 0.2 ⋅ 1 ⋅ 10,000 {\displaystyle 10{,}000=5\cdot 0.5\cdot 2\cdot 1\cdot 0.2\cdot 1\cdot 10{,}000} [better source needed] The Drake equation has proved controversial since, although it is written as a math equation, none of its values were known at the time. Although some values may eventually be measured, others are based on social sciences and are not knowable by their very nature. This does not allow one to make noteworthy conclusions from the equation. Based on observations from the Hubble Space Telescope, there are nearly 2 trillion galaxies in the observable universe. It is estimated that at least ten percent of all Sun-like stars have a system of planets. In other words, there are 6.25×1018 stars with planets orbiting them in the observable universe. Even if it is assumed that only one out of a billion of these stars has planets supporting life, there would be some 6.25 billion life-supporting planetary systems in the observable universe. A 2013 study based on results from the Kepler spacecraft estimated that the Milky Way contains at least as many planets as it does stars, resulting in 100–400 billion exoplanets. The Nebular hypothesis that explains the formation of the Solar System and other planetary systems would suggest that those can have several configurations, and not all of them may have rocky planets within the habitable zone. The apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilisations and the lack of evidence for such civilisations is known as the Fermi paradox. Dennis W. Sciama claimed that life's existence in the universe depends on various fundamental constants. Zhi-Wei Wang and Samuel L. Braunstein suggest that a random universe capable of supporting life is likely to be just barely able to do so, giving a potential explanation to the Fermi paradox. Biochemical basis If extraterrestrial life exists, it could range from simple microorganisms and multicellular organisms similar to animals or plants, to complex alien intelligences akin to humans. When scientists talk about extraterrestrial life, they consider all those types. Although it is possible that extraterrestrial life may have other configurations, scientists use the hierarchy of lifeforms from Earth for simplicity, as it is the only one known to exist. The first basic requirement for life is an environment with non-equilibrium thermodynamics, which means that the thermodynamic equilibrium must be broken by a source of energy. The traditional sources of energy in the cosmos are the stars, such as for life on Earth, which depends on the energy of the sun. However, there are other alternative energy sources, such as volcanoes, plate tectonics, and hydrothermal vents. There are ecosystems on Earth in deep areas of the ocean that do not receive sunlight, and take energy from black smokers instead. Magnetic fields and radioactivity have also been proposed as sources of energy, although they would be less efficient ones. Life on Earth requires water in a liquid state as a solvent in which biochemical reactions take place. It is highly unlikely that an abiogenesis process can start within a gaseous or solid medium: the atom speeds, either too fast or too slow, make it difficult for specific ones to meet and start chemical reactions. A liquid medium also allows the transport of nutrients and substances required for metabolism. Sufficient quantities of carbon and other elements, along with water, might enable the formation of living organisms on terrestrial planets with a chemical make-up and temperature range similar to that of Earth. Life based on ammonia rather than water has been suggested as an alternative, though this solvent appears less suitable than water. It is also conceivable that there are forms of life whose solvent is a liquid hydrocarbon, such as methane, ethane or propane. Another unknown aspect of potential extraterrestrial life would be the chemical elements that would compose it. Life on Earth is largely composed of carbon, but there could be other hypothetical types of biochemistry. A replacement for carbon would need to be able to create complex molecules, store information required for evolution, and be freely available in the medium. To create DNA, RNA, or a close analog, such an element should be able to bind its atoms with many others, creating complex and stable molecules. It should be able to create at least three covalent bonds: two for making long strings and at least a third to add new links and allow for diverse information. Only nine elements meet this requirement: boron, nitrogen, phosphorus, arsenic, antimony (three bonds), carbon, silicon, germanium and tin (four bonds). As for abundance, carbon, nitrogen, and silicon are the most abundant ones in the universe, far more than the others. On Earth's crust the most abundant of those elements is silicon, in the Hydrosphere it is carbon and in the atmosphere, it is carbon and nitrogen. Silicon, however, has disadvantages over carbon. The molecules formed with silicon atoms are less stable, and more vulnerable to acids, oxygen, and light. An ecosystem of silicon-based lifeforms would require very low temperatures, high atmospheric pressure, an atmosphere devoid of oxygen, and a solvent other than water. The low temperatures required would add an extra problem, the difficulty to kickstart a process of abiogenesis to create life in the first place. Norman Horowitz, head of the Jet Propulsion Laboratory bioscience section for the Mariner and Viking missions from 1965 to 1976 considered that the great versatility of the carbon atom makes it the element most likely to provide solutions, even exotic solutions, to the problems of survival of life on other planets. However, he also considered that the conditions found on Mars were incompatible with carbon based life. Even if extraterrestrial life is based on carbon and uses water as a solvent, like Earth life, it may still have a radically different biochemistry. Life is generally considered to be a product of natural selection. It has been proposed that to undergo natural selection a living entity must have the capacity to replicate itself, the capacity to avoid damage/decay, and the capacity to acquire and process resources in support of the first two capacities. Life on Earth may have started with an RNA world and later evolved to its current form, where some of the RNA tasks were transferred to DNA and proteins. Extraterrestrial life may still be stuck using RNA, or evolve into other configurations. It is unclear if our biochemistry is the most efficient one that could be generated, or which elements would follow a similar pattern. However, it is likely that, even if cells had a different composition to those from Earth, they would still have a cell membrane. Life on Earth jumped from prokaryotes to eukaryotes and from unicellular organisms to multicellular organisms through evolution. So far no alternative process to achieve such a result has been conceived, even if hypothetical. Evolution requires life to be divided into individual organisms, and no alternative organisation has been satisfactorily proposed either. At the basic level, membranes define the limit of a cell, between it and its environment, while remaining partially open to exchange energy and resources with it. The evolution from simple cells to eukaryotes, and from them to multicellular lifeforms, is not guaranteed. The Cambrian explosion took place thousands of millions of years after the origin of life, and its causes are not fully known yet. On the other hand, the jump to multicellularity took place several times, which suggests that it could be a case of convergent evolution, and so likely to take place on other planets as well. Palaeontologist Simon Conway Morris considers that convergent evolution would lead to kingdoms similar to our plants and animals, and that many features are likely to develop in alien animals as well, such as bilateral symmetry, limbs, digestive systems and heads with sensory organs. Scientists from the University of Oxford analysed it from the perspective of evolutionary theory and wrote in a study in the International Journal of Astrobiology that aliens may be similar to humans. The planetary context would also have an influence: a planet with higher gravity would have smaller animals, and other types of stars can lead to non-green photosynthesizers. The amount of energy available would also affect biodiversity, as an ecosystem sustained by black smokers or hydrothermal vents would have less energy available than those sustained by a star's light and heat, and so its lifeforms would not grow beyond a certain complexity. There is also research in assessing the capacity of life for developing intelligence. It has been suggested that this capacity arises with the number of potential niches a planet contains, and that the complexity of life itself is reflected in the information density of planetary environments, which in turn can be computed from its niches. It is common knowledge that the conditions on other planets in the solar system, in addition to the many galaxies outside of the Milky Way galaxy, are very harsh and seem to be too extreme to harbor any life. The environmental conditions on these planets can have intense UV radiation paired with extreme temperatures, lack of water, and much more that can lead to conditions that don't seem to favor the creation or maintenance of extraterrestrial life. However, there has been much historical evidence that some of the earliest and most basic forms of life on Earth originated in some extreme environments that seem unlikely to have harbored life at least at one point in Earth's history. Fossil evidence as well as many historical theories backed up by years of research and studies have marked environments like hydrothermal vents or acidic hot springs as some of the first places that life could have originated on Earth. These environments can be considered extreme when compared to the typical ecosystems that the majority of life on Earth now inhabit, as hydrothermal vents are scorching hot due to the magma escaping from the Earth's mantle and meeting the much colder oceanic water. Even in today's world, there can be a diverse population of bacteria found inhabiting the area surrounding these hydrothermal vents which can suggest that some form of life can be supported even in the harshest of environments like the other planets in the solar system. The aspects of these harsh environments that make them ideal for the origin of life on Earth, as well as the possibility of creation of life on other planets, is the chemical reactions forming spontaneously. For example, the hydrothermal vents found on the ocean floor are known to support many chemosynthetic processes which allow organisms to utilize energy through reduced chemical compounds that fix carbon. In return, these reactions will allow for organisms to live in relatively low oxygenated environments while maintaining enough energy to support themselves. The early Earth environment was reducing and therefore, these carbon fixing compounds were necessary for the survival and possible origin of life on Earth. With the little amount of information that scientists have found regarding the atmosphere on other planets in the Milky Way galaxy and beyond, the atmospheres are most likely reducing or with very low oxygen levels, especially when compared with Earth's atmosphere. If there were the necessary elements and ions on these planets, the same carbon fixing, reduced chemical compounds occurring around hydrothermal vents could also occur on these planets' surfaces and possibly result in the origin of extraterrestrial life. Planetary habitability in the Solar System The Solar System has a wide variety of planets, dwarf planets, and moons, and each one is studied for its potential to host life. Each one has its own specific conditions that may benefit or harm life. So far, the only lifeforms found are those from Earth. No extraterrestrial intelligence other than humans exists or has ever existed within the Solar System. Astrobiologist Mary Voytek points out that it would be unlikely to find large ecosystems, as they would have already been detected by now. The inner Solar System is likely devoid of life. However, Venus is still of interest to astrobiologists, as it is a terrestrial planet that was likely similar to Earth in its early stages and developed in a different way. There is a greenhouse effect, the surface is the hottest in the Solar System, sulfuric acid clouds, all surface liquid water is lost, and it has a thick carbon-dioxide atmosphere with huge pressure. Comparing both helps to understand the precise differences that lead to beneficial or harmful conditions for life. And despite the conditions against life on Venus, there are suspicions that microbial life-forms may still survive in high-altitude clouds. Mars is a cold and almost airless desert, inhospitable to life. However, recent studies revealed that water on Mars used to be quite abundant, forming rivers, lakes, and perhaps even oceans. Mars may have been habitable back then, and life on Mars may have been possible. But when the planetary core ceased to generate a magnetic field, solar winds removed the atmosphere and the planet became vulnerable to solar radiation. Ancient life-forms may still have left fossilised remains, and microbes may still survive deep underground. As mentioned, the gas giants and ice giants are unlikely to contain life. The most distant solar system bodies, found in the Kuiper Belt and outwards, are locked in permanent deep-freeze, but cannot be ruled out completely. Although the giant planets themselves are highly unlikely to have life, there is much hope to find it on moons orbiting these planets. Europa, from the Jovian system, has a subsurface ocean below a thick layer of ice. Ganymede and Callisto also have subsurface oceans, but life is less likely in them because water is sandwiched between layers of solid ice. Europa would have contact between the ocean and the rocky surface, which helps the chemical reactions. It may be difficult to dig so deep in order to study those oceans, though. Enceladus, a tiny moon of Saturn with another subsurface ocean, may not need to be dug, as it releases water to space in eruption columns. The space probe Cassini flew inside one of these, but could not make a full study because NASA did not expect this phenomenon and did not equip the probe to study ocean water. Still, Cassini detected complex organic molecules, salts, evidence of hydrothermal activity, hydrogen, and methane. Titan is the only celestial body in the Solar System besides Earth that has liquid bodies on the surface. It has rivers, lakes, and rain of hydrocarbons, methane, and ethane, and even a cycle similar to Earth's water cycle. This special context encourages speculations about lifeforms with different biochemistry, but the cold temperatures would make such chemistry take place at a very slow pace. Water is rock-solid on the surface, but Titan does have a subsurface water ocean like several other moons. However, it is of such a great depth that it would be very difficult to access it for study. Scientific search The science that searches and studies life in the universe, both on Earth and elsewhere, is called astrobiology. With the study of Earth's life, the only known form of life, astrobiology seeks to study how life starts and evolves and the requirements for its continuous existence. This helps to determine what to look for when searching for life in other celestial bodies. This is a complex area of study, and uses the combined perspectives of several scientific disciplines, such as astronomy, biology, chemistry, geology, oceanography, and atmospheric sciences. The scientific search for extraterrestrial life is being carried out both directly and indirectly. As of September 2017[update], 3,667 exoplanets in 2,747 systems have been identified, and other planets and moons in the Solar System hold the potential for hosting primitive life such as microorganisms. As of 8 February 2021, an updated status of studies considering the possible detection of lifeforms on Venus (via phosphine) and Mars (via methane) was reported. Scientists search for biosignatures within the Solar System by studying planetary surfaces and examining meteorites. Some claim to have identified evidence that microbial life has existed on Mars. In 1996, a controversial report stated that structures resembling nanobacteria were discovered in a meteorite, ALH84001, formed of rock ejected from Mars. Although all the unusual properties of the meteorite were eventually explained as the result of inorganic processes, the controversy over its discovery laid the groundwork for the development of astrobiology. An experiment on the two Viking Mars landers reported gas emissions from heated Martian soil samples that some scientists argue are consistent with the presence of living microorganisms. Lack of corroborating evidence from other experiments on the same samples suggests that a non-biological reaction is a more likely hypothesis. In February 2005 NASA scientists reported they may have found some evidence of extraterrestrial life on Mars. The two scientists, Carol Stoker and Larry Lemke of NASA's Ames Research Center, based their claim on methane signatures found in Mars's atmosphere resembling the methane production of some forms of primitive life on Earth, as well as on their own study of primitive life near the Rio Tinto river in Spain. NASA officials soon distanced NASA from the scientists' claims, and Stoker herself backed off from her initial assertions. In November 2011, NASA launched the Mars Science Laboratory that landed the Curiosity rover on Mars. It is designed to assess the past and present habitability on Mars using a variety of scientific instruments. The rover landed on Mars at Gale Crater in August 2012. A group of scientists at Cornell University started a catalog of microorganisms, with the way each one reacts to sunlight. The goal is to help with the search for similar organisms in exoplanets, as the starlight reflected by planets rich in such organisms would have a specific spectrum, unlike that of starlight reflected from lifeless planets. If Earth was studied from afar with this system, it would reveal a shade of green, as a result of the abundance of plants with photosynthesis. In August 2011, NASA studied meteorites found on Antarctica, finding adenine, guanine, hypoxanthine, and xanthine. Adenine and guanine are components of DNA, and the others are used in other biological processes. The studies ruled out pollution of the meteorites on Earth, as those components would not be freely available the way they were found in the samples. This discovery suggests that several organic molecules that serve as building blocks of life may be generated within asteroids and comets. In October 2011, scientists reported that cosmic dust contains complex organic compounds ("amorphous organic solids with a mixed aromatic-aliphatic structure") that could be created naturally, and rapidly, by stars. It is still unclear if those compounds played a role in the creation of life on Earth, but Sun Kwok, of the University of Hong Kong, thinks so. "If this is the case, life on Earth may have had an easier time getting started as these organics can serve as basic ingredients for life." In August 2012, and in a world first, astronomers at Copenhagen University reported the detection of a specific sugar molecule, glycolaldehyde, in a distant star system. The molecule was found around the protostellar binary IRAS 16293-2422, which is located 400 light years from Earth. Glycolaldehyde is needed to form ribonucleic acid, or RNA, which is similar in function to DNA. This finding suggests that complex organic molecules may form in stellar systems prior to the formation of planets, eventually arriving on young planets early in their formation. In December 2023, astronomers reported the first time discovery, in the plumes of Enceladus, moon of the planet Saturn, of hydrogen cyanide, a possible chemical essential for life as we know it, as well as other organic molecules, some of which are yet to be better identified and understood. According to the researchers, "these [newly discovered] compounds could potentially support extant microbial communities or drive complex organic synthesis leading to the origin of life." Although most searches are focused on the biology of extraterrestrial life, an extraterrestrial intelligence capable enough to develop a civilization may be detectable by other means as well. Technology may generate technosignatures, effects on the native planet that may not be caused by natural causes. There are three main types of techno-signatures considered: interstellar communications, effects on the atmosphere, and planetary-sized structures such as Dyson spheres. Organizations such as the SETI Institute search the cosmos for potential forms of communication. They started with radio waves, and now search for laser pulses as well. The challenge for this search is that there are natural sources of such signals as well, such as gamma-ray bursts and supernovae, and the difference between a natural signal and an artificial one would be in its specific patterns. Astronomers intend to use artificial intelligence for this, as it can manage large amounts of data and is devoid of biases and preconceptions. Besides, even if there is an advanced extraterrestrial civilization, there is no guarantee that it is transmitting radio communications in the direction of Earth. The length of time required for a signal to travel across space means that a potential answer may arrive decades or centuries after the initial message. The atmosphere of Earth is rich in nitrogen dioxide as a result of air pollution, which can be detectable. The natural abundance of carbon, which is also relatively reactive, makes it likely to be a basic component of the development of a potential extraterrestrial technological civilization, as it is on Earth. Fossil fuels may likely be generated and used on such worlds as well. The abundance of chlorofluorocarbons in the atmosphere can also be a clear technosignature, considering their role in ozone depletion. Light pollution may be another technosignature, as multiple lights on the night side of a rocky planet can be a sign of advanced technological development. However, modern telescopes are not strong enough to study exoplanets with the required level of detail to perceive it. The Kardashev scale proposes that a civilization may eventually start consuming energy directly from its local star. This would require giant structures built next to it, called Dyson spheres. Those speculative structures would cause an excess infrared radiation, that telescopes may notice. The infrared radiation is typical of young stars, surrounded by dusty protoplanetary disks that will eventually form planets. An older star such as the Sun would have no natural reason to have excess infrared radiation. The presence of heavy elements in a star's light-spectrum is another potential biosignature; such elements would (in theory) be found if the star were being used as an incinerator/repository for nuclear waste products. Some astronomers search for extrasolar planets that may be conducive to life, narrowing the search to terrestrial planets within the habitable zones of their stars. Since 1992, over four thousand exoplanets have been discovered (6,128 planets in 4,584 planetary systems including 1,017 multiple planetary systems as of 30 October 2025). The extrasolar planets so far discovered range in size from that of terrestrial planets similar to Earth's size to that of gas giants larger than Jupiter. The number of observed exoplanets is expected to increase greatly in the coming years.[better source needed] The Kepler space telescope has also detected a few thousand candidate planets, of which about 11% may be false positives. There is at least one planet on average per star. About 1 in 5 Sun-like stars[a] have an "Earth-sized"[b] planet in the habitable zone,[c] with the nearest expected to be within 12 light-years distance from Earth. Assuming 200 billion stars in the Milky Way,[d] that would be 11 billion potentially habitable Earth-sized planets in the Milky Way, rising to 40 billion if red dwarfs are included. The rogue planets in the Milky Way possibly number in the trillions. The nearest known exoplanet is Proxima Centauri b, located 4.2 light-years (1.3 pc) from Earth in the southern constellation of Centaurus. As of March 2014[update], the least massive exoplanet known is PSR B1257+12 A, which is about twice the mass of the Moon. The most massive planet listed on the NASA Exoplanet Archive is DENIS-P J082303.1−491201 b, about 29 times the mass of Jupiter, although according to most definitions of a planet, it is too massive to be a planet and may be a brown dwarf instead. Almost all of the planets detected so far are within the Milky Way, but there have also been a few possible detections of extragalactic planets. The study of planetary habitability also considers a wide range of other factors in determining the suitability of a planet for hosting life. One sign that a planet probably already contains life is the presence of an atmosphere with significant amounts of oxygen, since that gas is highly reactive and generally would not last long without constant replenishment. This replenishment occurs on Earth through photosynthetic organisms. One way to analyse the atmosphere of an exoplanet is through spectrography when it transits its star, though this might only be feasible with dim stars like white dwarfs. History and cultural impact The modern concept of extraterrestrial life is based on assumptions that were not commonplace during the early days of astronomy. The first explanations for the celestial objects seen in the night sky were based on mythology. Scholars from Ancient Greece were the first to consider that the universe is inherently understandable and rejected explanations based on supernatural incomprehensible forces, such as the myth of the Sun being pulled across the sky in the chariot of Apollo. They had not developed the scientific method yet and based their ideas on pure thought and speculation, but they developed precursor ideas to it, such as that explanations had to be discarded if they contradict observable facts. The discussions of those Greek scholars established many of the pillars that would eventually lead to the idea of extraterrestrial life, such as Earth being round and not flat. The cosmos was first structured in a geocentric model that considered that the sun and all other celestial bodies revolve around Earth. However, they did not consider them as worlds. In Greek understanding, the world was composed by both Earth and the celestial objects with noticeable movements. Anaximander thought that the cosmos was made from apeiron, a substance that created the world, and that the world would eventually return to the cosmos. Eventually two groups emerged, the atomists that thought that matter at both Earth and the cosmos was equally made of small atoms of the classical elements (earth, water, fire and air), and the Aristotelians who thought that those elements were exclusive of Earth and that the cosmos was made of a fifth one, the aether. Atomist Epicurus thought that the processes that created the world, its animals and plants should have created other worlds elsewhere, along with their own animals and plants. Aristotle thought instead that all the earth element naturally fell towards the center of the universe, and that would make it impossible for other planets to exist elsewhere. Under that reasoning, Earth was not only in the center, it was also the only planet in the universe. Cosmic pluralism, the plurality of worlds, or simply pluralism, describes the philosophical belief in numerous "worlds" in addition to Earth, which might harbor extraterrestrial life. The earliest recorded assertion of extraterrestrial human life is found in ancient scriptures of Jainism. There are multiple "worlds" mentioned in Jain scriptures that support human life. These include, among others, Bharat Kshetra, Mahavideh Kshetra, Airavat Kshetra, and Hari kshetra. Medieval Muslim writers like Fakhr al-Din al-Razi and Muhammad al-Baqir supported cosmic pluralism on the basis of the Qur'an. Chaucer's poem The House of Fame engaged in medieval thought experiments that postulated the plurality of worlds. However, those ideas about other worlds were different from the current knowledge about the structure of the universe, and did not postulate the existence of planetary systems other than the Solar System. When those authors talk about other worlds, they talk about places located at the center of their own systems, and with their own stellar vaults and cosmos surrounding them. The Greek ideas and the disputes between atomists and Aristotelians outlived the fall of the Greek empire. The Great Library of Alexandria compiled information about it, part of which was translated by Islamic scholars and thus survived the end of the Library. Baghdad combined the knowledge of the Greeks, the Indians, the Chinese and its own scholars, and the knowledge expanded through the Byzantine Empire. From there it eventually returned to Europe by the time of the Middle Ages. However, as the Greek atomist doctrine held that the world was created by random movements of atoms, with no need for a creator deity, it became associated with atheism, and the dispute intertwined with religious ones. Still, the Church did not react to those topics in a homogeneous way, and there were stricter and more permissive views within the church itself. The first known mention of the term 'panspermia' was in the writings of the 5th-century BC Greek philosopher Anaxagoras. He proposed the idea that life exists everywhere. By the time of the late Middle Ages there were many known inaccuracies in the geocentric model, but it was kept in use because naked eye observations provided limited data. Nicolaus Copernicus started the Copernican Revolution by proposing that the planets revolve around the sun rather than Earth. His proposal had little acceptance at first because, as he kept the assumption that orbits were perfect circles, his model led to as many inaccuracies as the geocentric one. Tycho Brahe improved the available data with naked-eye observatories, which worked with highly complex sextants and quadrants. Tycho could not make sense of his observations, but Johannes Kepler did: orbits were not perfect circles, but ellipses. This knowledge benefited the Copernican model, which worked now almost perfectly. The invention of the telescope a short time later, perfected by Galileo Galilei, clarified the final doubts, and the paradigm shift was completed. Under this new understanding, the notion of extraterrestrial life became feasible: if Earth is but just a planet orbiting around a star, there may be planets similar to Earth elsewhere. The astronomical study of distant bodies also proved that physical laws are the same elsewhere in the universe as on Earth, with nothing making the planet truly special. The new ideas were met with resistance from the Catholic church. Galileo was tried for the heliocentric model, which was considered heretical, and forced to recant it. The best-known early-modern proponent of ideas of extraterrestrial life was the Italian philosopher Giordano Bruno, who argued in the 16th century for an infinite universe in which every star is surrounded by its own planetary system. Bruno wrote that other worlds "have no less virtue nor a nature different to that of our earth" and, like Earth, "contain animals and inhabitants". Bruno's belief in the plurality of worlds was one of the charges leveled against him by the Venetian Holy Inquisition, which tried and executed him. The heliocentric model was further strengthened by the postulation of the theory of gravity by Sir Isaac Newton. This theory provided the mathematics that explains the motions of all things in the universe, including planetary orbits. By this point, the geocentric model was definitely discarded. By this time, the use of the scientific method had become a standard, and new discoveries were expected to provide evidence and rigorous mathematical explanations. Science also took a deeper interest in the mechanics of natural phenomena, trying to explain not just the way nature works but also the reasons for working that way. There was very little actual discussion about extraterrestrial life before this point, as the Aristotelian ideas remained influential while geocentrism was still accepted. When it was finally proved wrong, it not only meant that Earth was not the center of the universe, but also that the lights seen in the sky were not just lights, but physical objects. The notion that life may exist in them as well soon became an ongoing topic of discussion, although one with no practical ways to investigate. The possibility of extraterrestrials remained a widespread speculation as scientific discovery accelerated. William Herschel, the discoverer of Uranus, was one of many 18th–19th-century astronomers who believed that the Solar System is populated by alien life. Other scholars of the period who championed "cosmic pluralism" included Immanuel Kant and Benjamin Franklin. At the height of the Enlightenment, even the Sun and Moon were considered candidates for extraterrestrial inhabitants. Speculation about life on Mars increased in the late 19th century, following telescopic observation of apparent Martian canals – which soon, however, turned out to be optical illusions. Despite this, in 1895, American astronomer Percival Lowell published his book Mars, followed by Mars and its Canals in 1906, proposing that the canals were the work of a long-gone civilisation. Spectroscopic analysis of Mars's atmosphere began in earnest in 1894, when U.S. astronomer William Wallace Campbell showed that neither water nor oxygen was present in the Martian atmosphere. By 1909 better telescopes and the best perihelic opposition of Mars since 1877 conclusively put an end to the canal hypothesis. As a consequence of the belief in the spontaneous generation there was little thought about the conditions of each celestial body: it was simply assumed that life would thrive anywhere. This theory was disproved by Louis Pasteur in the 19th century. Popular belief in thriving alien civilisations elsewhere in the solar system still remained strong until Mariner 4 and Mariner 9 provided close images of Mars, which debunked forever the idea of the existence of Martians and decreased the previous expectations of finding alien life in general. The end of the spontaneous generation belief forced investigation into the origin of life. Although abiogenesis is the more accepted theory, a number of authors reclaimed the term "panspermia" and proposed that life was brought to Earth from elsewhere. Some of those authors are Jöns Jacob Berzelius (1834), Kelvin (1871), Hermann von Helmholtz (1879) and, somewhat later, by Svante Arrhenius (1903). The science fiction genre, although not so named during the time, developed during the late 19th century. The expansion of the genre of extraterrestrials in fiction influenced the popular perception over the real-life topic, making people eager to jump to conclusions about the discovery of aliens. Science marched at a slower pace, some discoveries fueled expectations and others dashed excessive hopes. For example, with the advent of telescopes, most structures seen on the Moon or Mars were immediately attributed to Selenites or Martians, and later ones (such as more powerful telescopes) revealed that all such discoveries were natural features. A famous case is the Cydonia region of Mars, first imaged by the Viking 1 orbiter. The low-resolution photos showed a rock formation that resembled a human face, but later spacecraft took photos in higher detail that showed that there was nothing special about the site. The search and study of extraterrestrial life became a science of its own, astrobiology. Also known as exobiology, this discipline is studied by the NASA, the ESA, the INAF, and others. Astrobiology studies life from Earth as well, but with a cosmic perspective. For example, abiogenesis is of interest to astrobiology, not because of the origin of life on Earth, but for the chances of a similar process taking place in other celestial bodies. Many aspects of life, from its definition to its chemistry, are analyzed as either likely to be similar in all forms of life across the cosmos or only native to Earth. Astrobiology, however, remains constrained by the current lack of extraterrestrial life-forms to study, as all life on Earth comes from the same ancestor, and it is hard to infer general characteristics from a group with a single example to analyse. The 20th century came with great technological advances, speculations about future hypothetical technologies, and an increased basic knowledge of science by the general population thanks to science divulgation through the mass media. The public interest in extraterrestrial life and the lack of discoveries by mainstream science led to the emergence of pseudosciences that provided affirmative, if questionable, answers to the existence of aliens. Ufology claims that many unidentified flying objects (UFOs) would be spaceships from alien species, and ancient astronauts hypothesis claim that aliens would have visited Earth in antiquity and prehistoric times but people would have failed to understand it by then. Most UFOs or UFO sightings can be readily explained as sightings of Earth-based aircraft (including top-secret aircraft), known astronomical objects or weather phenomenons, or as hoaxes. Looking beyond the pseudosciences, Lewis White Beck strove to elevate the level of public discourse on the topic of extraterrestrial life by tracing the evolution of philosophical thought over the centuries from ancient times into the modern era. His review of the contributions made by Lucretius, Plutarch, Aristotle, Copernicus, Immanuel Kant, John Wilkins, Charles Darwin and Karl Marx demonstrated that even in modern times, humanity could be profoundly influenced in its search for extraterrestrial life by subtle and comforting archetypal ideas which are largely derived from firmly held religious, philosophical and existential belief systems. On a positive note, however, Beck further argued that even if the search for extraterrestrial life proves to be unsuccessful, the endeavor itself could have beneficial consequences by assisting humanity in its attempt to actualize superior ways of living here on Earth. By the 21st century, it was accepted that multicellular life in the Solar System can only exist on Earth, but the interest in extraterrestrial life increased regardless. This is a result of the advances in several sciences. The knowledge of planetary habitability allows to consider on scientific terms the likelihood of finding life at each specific celestial body, as it is known which features are beneficial and harmful for life. Astronomy and telescopes also improved to the point exoplanets can be confirmed and even studied, increasing the number of search places. Life may still exist elsewhere in the Solar System in unicellular form, but the advances in spacecraft allow to send robots to study samples in situ, with tools of growing complexity and reliability. Although no extraterrestrial life has been found and life may still be just a rarity from Earth, there are scientific reasons to suspect that it can exist elsewhere, and technological advances that may detect it if it does. Many scientists are optimistic about the chances of finding alien life. In the words of SETI's Frank Drake, "All we know for sure is that the sky is not littered with powerful microwave transmitters". Drake noted that it is entirely possible that advanced technology results in communication being carried out in some way other than conventional radio transmission. At the same time, the data returned by space probes, and giant strides in detection methods, have allowed science to begin delineating habitability criteria on other worlds, and to confirm that at least other planets are plentiful, though aliens remain a question mark. The Wow! signal, detected in 1977 by a SETI project, remains a subject of speculative debate. On the other hand, other scientists are pessimistic. Jacques Monod wrote that "Man knows at last that he is alone in the indifferent immensity of the universe, whence which he has emerged by chance". In 2000, geologist and paleontologist Peter Ward and astrobiologist Donald Brownlee published a book entitled Rare Earth: Why Complex Life is Uncommon in the Universe.[better source needed] In it, they discussed the Rare Earth hypothesis, in which they claim that Earth-like life is rare in the universe, whereas microbial life is common. Ward and Brownlee are open to the idea of evolution on other planets that is not based on essential Earth-like characteristics such as DNA and carbon. As for the possible risks, theoretical physicist Stephen Hawking warned in 2010 that humans should not try to contact alien life forms. He warned that aliens might pillage Earth for resources. "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans", he said. Jared Diamond had earlier expressed similar concerns. On 20 July 2015, Hawking and Russian billionaire Yuri Milner, along with the SETI Institute, announced a well-funded effort, called the Breakthrough Initiatives, to expand efforts to search for extraterrestrial life. The group contracted the services of the 100-meter Robert C. Byrd Green Bank Telescope in West Virginia in the United States and the 64-meter Parkes Telescope in New South Wales, Australia. On 13 February 2015, scientists (including Geoffrey Marcy, Seth Shostak, Frank Drake and David Brin) at a convention of the American Association for the Advancement of Science, discussed Active SETI and whether transmitting a message to possible intelligent extraterrestrials in the Cosmos was a good idea; one result was a statement, signed by many, that a "worldwide scientific, political and humanitarian discussion must occur before any message is sent". Government responses The 1967 Outer Space Treaty and the 1979 Moon Agreement define rules of planetary protection against potentially hazardous extraterrestrial life. COSPAR also provides guidelines for planetary protection. A committee of the United Nations Office for Outer Space Affairs had in 1977 discussed for a year strategies for interacting with extraterrestrial life or intelligence. The discussion ended without any conclusions. As of 2010, the UN lacks response mechanisms for the case of an extraterrestrial contact. One of the NASA divisions is the Office of Safety and Mission Assurance (OSMA), also known as the Planetary Protection Office. A part of its mission is to "rigorously preclude backward contamination of Earth by extraterrestrial life." In 2016, the Chinese Government released a white paper detailing its space program. According to the document, one of the research objectives of the program is the search for extraterrestrial life. It is also one of the objectives of the Chinese Five-hundred-meter Aperture Spherical Telescope (FAST) program. In 2020, Dmitry Rogozin, the head of the Russian space agency, said the search for extraterrestrial life is one of the main goals of deep space research. He also acknowledged the possibility of existence of primitive life on other planets of the Solar System. The French space agency has an office for the study of "non-identified aero spatial phenomena". The agency is maintaining a publicly accessible database of such phenomena, with over 1600 detailed entries. According to the head of the office, the vast majority of entries have a mundane explanation; but for 25% of entries, their extraterrestrial origin can neither be confirmed nor denied. In 2020, chairman of the Israel Space Agency Isaac Ben-Israel stated that the probability of detecting life in outer space is "quite large". But he disagrees with his former colleague Haim Eshed who stated that there are contacts between an advanced alien civilisation and some of Earth's governments. In fiction Although the idea of extraterrestrial peoples became feasible once astronomy developed enough to understand the nature of planets, they were not thought of as being any different from humans. Having no scientific explanation for the origin of mankind and its relation to other species, there was no reason to expect them to be any other way. This was changed by the 1859 book On the Origin of Species by Charles Darwin, which proposed the theory of evolution. Now with the notion that evolution on other planets may take other directions, science fiction authors created bizarre aliens, clearly distinct from humans. A usual way to do that was to add body features from other animals, such as insects or octopuses. Costuming and special effects feasibility alongside budget considerations forced films and TV series to tone down the fantasy, but these limitations lessened since the 1990s with the advent of computer-generated imagery (CGI), and later on as CGI became more effective and less expensive. Real-life events sometimes captivate people's imagination and this influences the works of fiction. For example, during the Barney and Betty Hill incident, the first recorded claim of an alien abduction, the couple reported that they were abducted and experimented on by aliens with oversized heads, big eyes, pale grey skin, and small noses, a description that eventually became the grey alien archetype once used in works of fiction. See also Notes References Further reading External links |
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Contents Botnet A botnet is a group of Internet-connected devices, each of which runs one or more bots. Botnets can be used to perform distributed denial-of-service (DDoS) attacks, steal data, send spam, and allow the attacker to access the device and its connection. The owner can control the botnet using command and control (C&C) software. The word "botnet" is a portmanteau of the words "robot" and "network". The term is usually used with a negative or malicious connotation. Overview A botnet is a logical collection of Internet-connected devices, such as computers, smartphones or Internet of things (IoT) devices whose security have been breached and control ceded to a third party. Each compromised device, known as a "bot," is created when a device is penetrated by software from a malware (malicious software) distribution. The controller of a botnet is able to direct the activities of these compromised computers through communication channels formed by network protocols, such as Internet Relay Chat (IRC) and Hypertext Transfer Protocol (HTTP). Operating, building, or using a botnet to access or control devices without their owners’ authorization is illegal in most jurisdictions and is regularly prosecuted as hacking, fraud, or related cyber-crime. Law enforcement and private parties also use legal tools to disrupt botnets, but those takedowns raise separate legal and constitutional issues. Botnets are increasingly rented out by cyber criminals as commodities for a variety of purposes, including as booter/stresser services. Architecture Botnet architecture has evolved over time in an effort to evade detection and disruption. Traditionally, bot programs are constructed as clients which communicate via existing servers. This allows the bot herder (the controller of the botnet) to perform all control from a remote location, which obfuscates the traffic. Many recent botnets now rely on existing peer-to-peer networks to communicate. These P2P bot programs perform the same actions as the client–server model, but they do not require a central server to communicate. The first botnets on the Internet used a client–server model to accomplish their tasks. Typically, these botnets operate through Internet Relay Chat networks, domains, or websites. Infected clients access a predetermined location and await incoming commands from the server. The bot herder sends commands to the server, which relays them to the clients. Clients execute the commands and report their results back to the bot herder. In the case of IRC botnets, infected clients connect to an infected IRC server and join a channel pre-designated for C&C by the bot herder. The bot herder sends commands to the channel via the IRC server. Each client retrieves the commands and executes them. Clients send messages back to the IRC channel with the results of their actions. In response to efforts to detect and decapitate IRC botnets, bot herders have begun deploying malware on peer-to-peer networks. These bots may use digital signatures so that only someone with access to the private key can control the botnet, such as in Gameover ZeuS and the ZeroAccess botnet. Newer botnets fully operate over P2P networks. Rather than communicate with a centralized server, P2P bots perform as both a command distribution server and a client which receives commands. This avoids having any single point of failure, which is an issue for centralized botnets. In order to find other infected machines, P2P bots discreetly probe random IP addresses until they identify another infected machine. The contacted bot replies with information such as its software version and list of known bots. If one of the bots' version is lower than the other, they will initiate a file transfer to update. This way, each bot grows its list of infected machines and updates itself by periodically communicating to all known bots. Core components A botnet's originator (known as a "bot herder" or "bot master") controls the botnet remotely. This is known as the command-and-control (C&C). The program for the operation must communicate via a covert channel to the client on the victim's machine (zombie computer). IRC is a historically favored means of C&C because of its communication protocol. A bot herder creates an IRC channel for infected clients to join. Messages sent to the channel are broadcast to all channel members. The bot herder may set the channel's topic to command the botnet. For example, the message :herder!herder@example.com TOPIC #channel DDoS www.victim.com from the bot herder alerts all infected clients belonging to #channel to begin a DDoS attack on the website www.victim.com. An example response :bot1!bot1@compromised.net PRIVMSG #channel I am DDoSing www.victim.com by a bot client alerts the bot herder that it has begun the attack. Some botnets implement custom versions of well-known protocols. The implementation differences can be used for detection of botnets. For example, Mega-D features a slightly modified Simple Mail Transfer Protocol (SMTP) implementation for testing spam capability. Bringing down the Mega-D's SMTP server disables the entire pool of bots that rely upon the same SMTP server. In computer science, a zombie computer is a computer connected to the Internet that has been compromised by a hacker, computer virus or trojan horse and can be used to perform malicious tasks under remote direction. Botnets of zombie computers are often used to spread e-mail spam and launch denial-of-service attacks (DDoS). Most owners of zombie computers are unaware that their system is being used in this way. Because the owner tends to be unaware, these computers are metaphorically compared to zombies. A coordinated DDoS attack by multiple botnet machines also resembles a zombie horde attack. The process of stealing computing resources as a result of a system being joined to a "botnet" is sometimes referred to as "scrumping". Command and control Botnet command and control (C&C) protocols have been implemented in a number of ways, from traditional IRC approaches to more sophisticated versions. Telnet botnets use a simple C&C botnet protocol in which bots connect to the main command server to host the botnet. Bots are added to the botnet by using a scanning script, which runs on an external server and scans IP ranges for telnet and SSH server default logins. Once a login is found, the scanning server can infect it through SSH with malware, which pings the control server. IRC networks use simple, low bandwidth communication methods, making them widely used to host botnets. They tend to be relatively simple in construction and have been used with moderate success for coordinating DDoS attacks and spam campaigns while being able to continually switch channels to avoid being taken down. However, in some cases, merely blocking of certain keywords has proven effective in stopping IRC-based botnets. The RFC 1459 (IRC) standard is popular with botnets. The first known popular botnet controller script, "MaXiTE Bot" was using IRC XDCC protocol for private control commands. One problem with using IRC is that each bot client must know the IRC server, port, and channel to be of any use to the botnet. Anti-malware organizations can detect and shut down these servers and channels, effectively halting the botnet attack. If this happens, clients are still infected, but they typically lie dormant since they have no way of receiving instructions. To mitigate this problem, a botnet can consist of several servers or channels. If one of the servers or channels becomes disabled, the botnet simply switches to another. It is still possible to detect and disrupt additional botnet servers or channels by sniffing IRC traffic. A botnet adversary can even potentially gain knowledge of the control scheme and imitate the bot herder by issuing commands correctly. Since most botnets using IRC networks and domains can be taken down with time, hackers have moved to P2P botnets with C&C to make the botnet more resilient and resistant to termination. Some have also used encryption as a way to secure or lock down the botnet from others, most of the time when they use encryption it is public-key cryptography and has presented challenges in both implementing it and breaking it. Many large botnets tend to use domains rather than IRC in their construction (see Rustock botnet and Srizbi botnet). They are usually hosted with bulletproof hosting services. This is one of the earliest types of C&C. A zombie computer accesses a specially designed webpage or domain(s) which serves the list of controlling commands. The advantages of using web pages or domains as C&C is that a large botnet can be effectively controlled and maintained with very simple code that can be readily updated. Disadvantages of using this method are that it uses a considerable amount of bandwidth at large scale, and domains can be quickly seized by government agencies with little effort. If the domains controlling the botnets are not seized, they are also easy targets to compromise with denial-of-service attacks. Fast-flux DNS can be used to make it difficult to track down the control servers, which may change from day to day. Control servers may also hop from DNS domain to DNS domain, with domain generation algorithms being used to create new DNS names for controller servers. Some botnets use free DNS hosting services such as DynDns.org, No-IP.com, and Afraid.org to point a subdomain towards an IRC server that harbors the bots. While these free DNS services do not themselves host attacks, they provide reference points (often hard-coded into the botnet executable). Removing such services can cripple an entire botnet. Calling back to popular sites such as GitHub, Twitter, Reddit, Instagram, the XMPP open source instant message protocol and Tor hidden services are popular ways of avoiding egress filtering to communicate with a C&C server. Construction This example illustrates how a botnet is created and used for malicious gain. Newer bots can automatically scan their environment and propagate themselves using vulnerabilities and weak passwords. Generally, the more vulnerabilities a bot can scan and propagate through, the more valuable it becomes to a botnet controller community. Computers can be co-opted into a botnet when they execute malicious software. This can be accomplished by luring users into making a drive-by download, exploiting web browser vulnerabilities, or by tricking the user into running a Trojan horse program, which may come from an email attachment. This malware will typically install modules that allow the computer to be commanded and controlled by the botnet's operator. After the software is downloaded, it will call home (send a reconnection packet) to the host computer. When the re-connection is made, depending on how it is written, a Trojan may then delete itself or may remain present to update and maintain the modules. In some cases, a botnet may be temporarily created by volunteer hacktivists, such as with implementations of the Low Orbit Ion Cannon as used by 4chan members during Project Chanology in 2010. China's Great Cannon of China allows the modification of legitimate web browsing traffic at internet backbones into China to create a large ephemeral botnet to attack large targets such as GitHub in 2015. Common uses Market The botnet controller community constantly competes over who has the most bots, the highest overall bandwidth, and the most "high-quality" infected machines, like university, corporate, and even governmental machines. While botnets are often named after the malware that created them, multiple botnets typically use the same malware but are operated by different entities. Phishing Botnets can be used for many electronic scams. These botnets can be used to distribute malware such as viruses to take control of a regular user's computer/software. By taking control of someone's personal computer they have unlimited access to their personal information, including passwords and login information to accounts. This is called phishing. Phishing is the acquiring of login information to the "victim's" accounts with a link the "victim" clicks on that is sent through an email or text. A survey by Verizon found that around two-thirds of electronic "espionage" cases come from phishing. Countermeasures The geographic dispersal of botnets means that each recruit must be individually identified/corralled/repaired and limits the benefits of filtering. Computer security experts have succeeded in destroying or subverting malware command and control networks, by, among other means, seizing servers or getting them cut off from the Internet, denying access to domains that were due to be used by malware to contact its C&C infrastructure, and, in some cases, breaking into the C&C network itself. In response to this, C&C operators have resorted to using techniques such as overlaying their C&C networks on other existing benign infrastructure such as IRC or Tor, using peer-to-peer networking systems that are not dependent on any fixed servers, and using public key encryption to defeat attempts to break into or spoof the network. Norton AntiBot was aimed at consumers, but most target enterprises and/or ISPs. Host-based techniques use heuristics to identify bot behavior that has bypassed conventional anti-virus software. Network-based approaches tend to use the techniques described above; shutting down C&C servers, null-routing DNS entries, or completely shutting down IRC servers. BotHunter is software, developed with support from the U.S. Army Research Office, that detects botnet activity within a network by analyzing network traffic and comparing it to patterns characteristic of malicious processes. Researchers at Sandia National Laboratories are analyzing botnets' behavior by simultaneously running one million Linux kernels—a similar scale to a botnet—as virtual machines on a 4,480-node high-performance computer cluster to emulate a very large network, allowing them to watch how botnets work and experiment with ways to stop them. Detecting automated bot becomes more difficult as newer and more sophisticated generations of bots get launched by attackers. For example, an automated attack can deploy a large bot army and apply brute-force methods with highly accurate username and password lists to hack into accounts. The idea is to overwhelm sites with tens of thousands of requests from different IPs all over the world, but with each bot only submitting a single request every 10 minutes or so, which can result in more than 5 million attempts per day. In these cases, many tools try to leverage volumetric detection, but automated bot attacks now have ways of circumventing triggers of volumetric detection. One of the techniques for detecting these bot attacks is what's known as "signature-based systems" in which the software will attempt to detect patterns in the request packet. However, attacks are constantly evolving, so this may not be a viable option when patterns cannot be discerned from thousands of requests. There is also the behavioral approach to thwarting bots, which ultimately tries to distinguish bots from humans. By identifying non-human behavior and recognizing known bot behavior, this process can be applied at the user, browser, and network levels. The most capable method of using software to combat against a virus has been to utilize honeypot software in order to convince the malware that a system is vulnerable. The malicious files are then analyzed using forensic software. On 15 July 2014, the Subcommittee on Crime and Terrorism of the Committee on the Judiciary, United States Senate, held a hearing on the threats posed by botnets and the public and private efforts to disrupt and dismantle them. The rise in vulnerable IoT devices has led to an increase in IoT-based botnet attacks. To address this, a novel network-based anomaly detection method for IoT called N-BaIoT was introduced. It captures network behavior snapshots and employs deep autoencoders to identify abnormal traffic from compromised IoT devices. The method was tested by infecting nine IoT devices with Mirai and BASHLITE botnets, showing its ability to accurately and promptly detect attacks originating from compromised IoT devices within a botnet. Additionally, comparing different ways of detecting botnets is really useful for researchers. It helps them see how well each method works compared to others. This kind of comparison is good because it lets researchers evaluate the methods fairly and find ways to make them better. Historical list of botnets The first botnet was first acknowledged and exposed by EarthLink during a lawsuit with notorious spammer Khan C. Smith in 2001. The botnet was constructed for the purpose of bulk spam, and accounted for nearly 25% of all spam at the time. Around 2006, to thwart detection, some botnets were scaling back in size. The following is a non-exhaustive list of some historical botnets. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Python_(programming_language)#cite_ref-156] | [TOKENS: 4314] |
Contents Python (programming language) Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional programming. Guido van Rossum began working on Python in the late 1980s as a successor to the ABC programming language. Python 3.0, released in 2008, was a major revision and not completely backward-compatible with earlier versions. Beginning with Python 3.5, capabilities and keywords for typing were added to the language, allowing optional static typing. As of 2026[update], the Python Software Foundation supports Python 3.10, 3.11, 3.12, 3.13, and 3.14, following the project's annual release cycle and five-year support policy. Python 3.15 is currently in the alpha development phase, and the stable release is expected to come out in October 2026. Earlier versions in the 3.x series have reached end-of-life and no longer receive security updates. Python has gained widespread use in the machine learning community. It is widely taught as an introductory programming language. Since 2003, Python has consistently ranked in the top ten of the most popular programming languages in the TIOBE Programming Community Index, which ranks based on searches in 24 platforms. History Python was conceived in the late 1980s by Guido van Rossum at Centrum Wiskunde & Informatica (CWI) in the Netherlands. It was designed as a successor to the ABC programming language, which was inspired by SETL, capable of exception handling and interfacing with the Amoeba operating system. Python implementation began in December 1989. Van Rossum first released it in 1991 as Python 0.9.0. Van Rossum assumed sole responsibility for the project, as the lead developer, until 12 July 2018, when he announced his "permanent vacation" from responsibilities as Python's "benevolent dictator for life" (BDFL); this title was bestowed on him by the Python community to reflect his long-term commitment as the project's chief decision-maker. (He has since come out of retirement and is self-titled "BDFL-emeritus".) In January 2019, active Python core developers elected a five-member Steering Council to lead the project. The name Python derives from the British comedy series Monty Python's Flying Circus. (See § Naming.) Python 2.0 was released on 16 October 2000, featuring many new features such as list comprehensions, cycle-detecting garbage collection, reference counting, and Unicode support. Python 2.7's end-of-life was initially set for 2015, and then postponed to 2020 out of concern that a large body of existing code could not easily be forward-ported to Python 3. It no longer receives security patches or updates. While Python 2.7 and older versions are officially unsupported, a different unofficial Python implementation, PyPy, continues to support Python 2, i.e., "2.7.18+" (plus 3.11), with the plus signifying (at least some) "backported security updates". Python 3.0 was released on 3 December 2008, and was a major revision and not completely backward-compatible with earlier versions, with some new semantics and changed syntax. Python 2.7.18, released in 2020, was the last release of Python 2. Several releases in the Python 3.x series have added new syntax to the language, and made a few (considered very minor) backward-incompatible changes. As of January 2026[update], Python 3.14.3 is the latest stable release. All older 3.x versions had a security update down to Python 3.9.24 then again with 3.9.25, the final version in 3.9 series. Python 3.10 is, since November 2025, the oldest supported branch. Python 3.15 has an alpha released, and Android has an official downloadable executable available for Python 3.14. Releases receive two years of full support followed by three years of security support. Design philosophy and features Python is a multi-paradigm programming language. Object-oriented programming and structured programming are fully supported, and many of their features support functional programming and aspect-oriented programming – including metaprogramming and metaobjects. Many other paradigms are supported via extensions, including design by contract and logic programming. Python is often referred to as a 'glue language' because it is purposely designed to be able to integrate components written in other languages. Python uses dynamic typing and a combination of reference counting and a cycle-detecting garbage collector for memory management. It uses dynamic name resolution (late binding), which binds method and variable names during program execution. Python's design offers some support for functional programming in the "Lisp tradition". It has filter, map, and reduce functions; list comprehensions, dictionaries, sets, and generator expressions. The standard library has two modules (itertools and functools) that implement functional tools borrowed from Haskell and Standard ML. Python's core philosophy is summarized in the Zen of Python (PEP 20) written by Tim Peters, which includes aphorisms such as these: However, Python has received criticism for violating these principles and adding unnecessary language bloat. Responses to these criticisms note that the Zen of Python is a guideline rather than a rule. The addition of some new features had been controversial: Guido van Rossum resigned as Benevolent Dictator for Life after conflict about adding the assignment expression operator in Python 3.8. Nevertheless, rather than building all functionality into its core, Python was designed to be highly extensible via modules. This compact modularity has made it particularly popular as a means of adding programmable interfaces to existing applications. Van Rossum's vision of a small core language with a large standard library and easily extensible interpreter stemmed from his frustrations with ABC, which represented the opposite approach. Python claims to strive for a simpler, less-cluttered syntax and grammar, while giving developers a choice in their coding methodology. Python lacks do .. while loops, which Rossum considered harmful. In contrast to Perl's motto "there is more than one way to do it", Python advocates an approach where "there should be one – and preferably only one – obvious way to do it". In practice, however, Python provides many ways to achieve a given goal. There are at least three ways to format a string literal, with no certainty as to which one a programmer should use. Alex Martelli is a Fellow at the Python Software Foundation and Python book author; he wrote that "To describe something as 'clever' is not considered a compliment in the Python culture." Python's developers typically prioritize readability over performance. For example, they reject patches to non-critical parts of the CPython reference implementation that would offer increases in speed that do not justify the cost of clarity and readability.[failed verification] Execution speed can be improved by moving speed-critical functions to extension modules written in languages such as C, or by using a just-in-time compiler like PyPy. Also, it is possible to transpile to other languages. However, this approach either fails to achieve the expected speed-up, since Python is a very dynamic language, or only a restricted subset of Python is compiled (with potential minor semantic changes). Python is meant to be a fun language to use. This goal is reflected in the name – a tribute to the British comedy group Monty Python – and in playful approaches to some tutorials and reference materials. For instance, some code examples use the terms "spam" and "eggs" (in reference to a Monty Python sketch), rather than the typical terms "foo" and "bar". A common neologism in the Python community is pythonic, which has a broad range of meanings related to program style: Pythonic code may use Python idioms well; be natural or show fluency in the language; or conform with Python's minimalist philosophy and emphasis on readability. Syntax and semantics Python is meant to be an easily readable language. Its formatting is visually uncluttered and often uses English keywords where other languages use punctuation. Unlike many other languages, it does not use curly brackets to delimit blocks, and semicolons after statements are allowed but rarely used. It has fewer syntactic exceptions and special cases than C or Pascal. Python uses whitespace indentation, rather than curly brackets or keywords, to delimit blocks. An increase in indentation comes after certain statements; a decrease in indentation signifies the end of the current block. Thus, the program's visual structure accurately represents its semantic structure. This feature is sometimes termed the off-side rule. Some other languages use indentation this way; but in most, indentation has no semantic meaning. The recommended indent size is four spaces. Python's statements include the following: The assignment statement (=) binds a name as a reference to a separate, dynamically allocated object. Variables may subsequently be rebound at any time to any object. In Python, a variable name is a generic reference holder without a fixed data type; however, it always refers to some object with a type. This is called dynamic typing—in contrast to statically-typed languages, where each variable may contain only a value of a certain type. Python does not support tail call optimization or first-class continuations; according to Van Rossum, the language never will. However, better support for coroutine-like functionality is provided by extending Python's generators. Before 2.5, generators were lazy iterators; data was passed unidirectionally out of the generator. From Python 2.5 on, it is possible to pass data back into a generator function; and from version 3.3, data can be passed through multiple stack levels. Python's expressions include the following: In Python, a distinction between expressions and statements is rigidly enforced, in contrast to languages such as Common Lisp, Scheme, or Ruby. This distinction leads to duplicating some functionality, for example: A statement cannot be part of an expression; because of this restriction, expressions such as list and dict comprehensions (and lambda expressions) cannot contain statements. As a particular case, an assignment statement such as a = 1 cannot be part of the conditional expression of a conditional statement. Python uses duck typing, and it has typed objects but untyped variable names. Type constraints are not checked at definition time; rather, operations on an object may fail at usage time, indicating that the object is not of an appropriate type. Despite being dynamically typed, Python is strongly typed, forbidding operations that are poorly defined (e.g., adding a number and a string) rather than quietly attempting to interpret them. Python allows programmers to define their own types using classes, most often for object-oriented programming. New instances of classes are constructed by calling the class, for example, SpamClass() or EggsClass()); the classes are instances of the metaclass type (which is an instance of itself), thereby allowing metaprogramming and reflection. Before version 3.0, Python had two kinds of classes, both using the same syntax: old-style and new-style. Current Python versions support the semantics of only the new style. Python supports optional type annotations. These annotations are not enforced by the language, but may be used by external tools such as mypy to catch errors. Python includes a module typing including several type names for type annotations. Also, mypy supports a Python compiler called mypyc, which leverages type annotations for optimization. 1.33333 frozenset() Python includes conventional symbols for arithmetic operators (+, -, *, /), the floor-division operator //, and the modulo operator %. (With the modulo operator, a remainder can be negative, e.g., 4 % -3 == -2.) Also, Python offers the ** symbol for exponentiation, e.g. 5**3 == 125 and 9**0.5 == 3.0. Also, it offers the matrix‑multiplication operator @ . These operators work as in traditional mathematics; with the same precedence rules, the infix operators + and - can also be unary, to represent positive and negative numbers respectively. Division between integers produces floating-point results. The behavior of division has changed significantly over time: In Python terms, the / operator represents true division (or simply division), while the // operator represents floor division. Before version 3.0, the / operator represents classic division. Rounding towards negative infinity, though a different method than in most languages, adds consistency to Python. For instance, this rounding implies that the equation (a + b)//b == a//b + 1 is always true. Also, the rounding implies that the equation b*(a//b) + a%b == a is valid for both positive and negative values of a. As expected, the result of a%b lies in the half-open interval [0, b), where b is a positive integer; however, maintaining the validity of the equation requires that the result must lie in the interval (b, 0] when b is negative. Python provides a round function for rounding a float to the nearest integer. For tie-breaking, Python 3 uses the round to even method: round(1.5) and round(2.5) both produce 2. Python versions before 3 used the round-away-from-zero method: round(0.5) is 1.0, and round(-0.5) is −1.0. Python allows Boolean expressions that contain multiple equality relations to be consistent with general usage in mathematics. For example, the expression a < b < c tests whether a is less than b and b is less than c. C-derived languages interpret this expression differently: in C, the expression would first evaluate a < b, resulting in 0 or 1, and that result would then be compared with c. Python uses arbitrary-precision arithmetic for all integer operations. The Decimal type/class in the decimal module provides decimal floating-point numbers to a pre-defined arbitrary precision with several rounding modes. The Fraction class in the fractions module provides arbitrary precision for rational numbers. Due to Python's extensive mathematics library and the third-party library NumPy, the language is frequently used for scientific scripting in tasks such as numerical data processing and manipulation. Functions are created in Python by using the def keyword. A function is defined similarly to how it is called, by first providing the function name and then the required parameters. Here is an example of a function that prints its inputs: To assign a default value to a function parameter in case no actual value is provided at run time, variable-definition syntax can be used inside the function header. Code examples "Hello, World!" program: Program to calculate the factorial of a non-negative integer: Libraries Python's large standard library is commonly cited as one of its greatest strengths. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. The language includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals, manipulating regular expressions, and unit testing. Some parts of the standard library are covered by specifications—for example, the Web Server Gateway Interface (WSGI) implementation wsgiref follows PEP 333—but most parts are specified by their code, internal documentation, and test suites. However, because most of the standard library is cross-platform Python code, only a few modules must be altered or rewritten for variant implementations. As of 13 March 2025,[update] the Python Package Index (PyPI), the official repository for third-party Python software, contains over 614,339 packages. Development environments Most[which?] Python implementations (including CPython) include a read–eval–print loop (REPL); this permits the environment to function as a command line interpreter, with which users enter statements sequentially and receive results immediately. Also, CPython is bundled with an integrated development environment (IDE) called IDLE, which is oriented toward beginners.[citation needed] Other shells, including IDLE and IPython, add additional capabilities such as improved auto-completion, session-state retention, and syntax highlighting. Standard desktop IDEs include PyCharm, Spyder, and Visual Studio Code; there are web browser-based IDEs, such as the following environments: Implementations CPython is the reference implementation of Python. This implementation is written in C, meeting the C11 standard since version 3.11. Older versions use the C89 standard with several select C99 features, but third-party extensions are not limited to older C versions—e.g., they can be implemented using C11 or C++. CPython compiles Python programs into an intermediate bytecode, which is then executed by a virtual machine. CPython is distributed with a large standard library written in a combination of C and native Python. CPython is available for many platforms, including Windows and most modern Unix-like systems, including macOS (and Apple M1 Macs, since Python 3.9.1, using an experimental installer). Starting with Python 3.9, the Python installer intentionally fails to install on Windows 7 and 8; Windows XP was supported until Python 3.5, with unofficial support for VMS. Platform portability was one of Python's earliest priorities. During development of Python 1 and 2, even OS/2 and Solaris were supported; since that time, support has been dropped for many platforms. All current Python versions (since 3.7) support only operating systems that feature multithreading, by now supporting not nearly as many operating systems (dropping many outdated) than in the past. All alternative implementations have at least slightly different semantics. For example, an alternative may include unordered dictionaries, in contrast to other current Python versions. As another example in the larger Python ecosystem, PyPy does not support the full C Python API. Creating an executable with Python often is done by bundling an entire Python interpreter into the executable, which causes binary sizes to be massive for small programs, yet there exist implementations that are capable of truly compiling Python. Alternative implementations include the following: Stackless Python is a significant fork of CPython that implements microthreads. This implementation uses the call stack differently, thus allowing massively concurrent programs. PyPy also offers a stackless version. Just-in-time Python compilers have been developed, but are now unsupported: There are several compilers/transpilers to high-level object languages; the source language is unrestricted Python, a subset of Python, or a language similar to Python: There are also specialized compilers: Some older projects existed, as well as compilers not designed for use with Python 3.x and related syntax: A performance comparison among various Python implementations, using a non-numerical (combinatorial) workload, was presented at EuroSciPy '13. In addition, Python's performance relative to other programming languages is benchmarked by The Computer Language Benchmarks Game. There are several approaches to optimizing Python performance, despite the inherent slowness of an interpreted language. These approaches include the following strategies or tools: Language Development Python's development is conducted mostly through the Python Enhancement Proposal (PEP) process; this process is the primary mechanism for proposing major new features, collecting community input on issues, and documenting Python design decisions. Python coding style is covered in PEP 8. Outstanding PEPs are reviewed and commented on by the Python community and the steering council. Enhancement of the language corresponds with development of the CPython reference implementation. The mailing list python-dev is the primary forum for the language's development. Specific issues were originally discussed in the Roundup bug tracker hosted by the foundation. In 2022, all issues and discussions were migrated to GitHub. Development originally took place on a self-hosted source-code repository running Mercurial, until Python moved to GitHub in January 2017. CPython's public releases have three types, distinguished by which part of the version number is incremented: Many alpha, beta, and release-candidates are also released as previews and for testing before final releases. Although there is a rough schedule for releases, they are often delayed if the code is not ready yet. Python's development team monitors the state of the code by running a large unit test suite during development. The major academic conference on Python is PyCon. Also, there are special Python mentoring programs, such as PyLadies. Naming Python's name is inspired by the British comedy group Monty Python, whom Python creator Guido van Rossum enjoyed while developing the language. Monty Python references appear frequently in Python code and culture; for example, the metasyntactic variables often used in Python literature are spam and eggs, rather than the traditional foo and bar. Also, the official Python documentation contains various references to Monty Python routines. Python users are sometimes referred to as "Pythonistas". Languages influenced by Python See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/John_Elkann] | [TOKENS: 3947] |
Contents John Elkann John Philip Jacob Elkann (born 1 April 1976) is an American-born Italian industrialist. In 1997, he became the chosen heir of his maternal grandfather Gianni Agnelli, following the death of Gianni's nephew Giovanni Alberto Agnelli, and since 2004 has been leading the Agnelli family, an Italian multi-industry business dynasty. The Agnelli family has been described in media as comparable to the Kennedy family in terms of prominence in national affairs. Elkann chairs the automaker Stellantis and is the chief executive officer (CEO) of Exor, the holding company controlled by the Agnelli family, which also holds a controlling stake in Ferrari, CNH Industrial, Iveco Group, Juventus FC, and The Economist Group. In July 2018, he was appointed chairman of Ferrari, and briefly served as CEO from 2020 to 2021. In 2021, Elkann oversaw the merger between Fiat Chrysler and the PSA Group. He is the leader of a group that controls 14 brands, with production sites in 29 countries, employs 400,000 people, and is present in over 130 markets. Early life and family Born in New York City on 1 April 1976, Elkann held both Italian and U.S. citizenship; he renounced the latter in 2012. He is the eldest son of Alain Elkann, a New York-born journalist and writer of French-Jewish origin and Italian-Jewish background, and his Italian wife Margherita Agnelli. His parents divorced in 1981 and both have remarried. Elkann's maternal grandparents were the head of Fiat S.p.A., Gianni Agnelli, and the socialite Marella Agnelli (born Donna Marella Caracciolo di Castagneto); his great-grandfather was the industrialist Edoardo Agnelli, and his great-great-grandfather was Giovanni Agnelli, founder of Fiat S.p.A. His paternal great-grand-uncle was the banker Ettore Ovazza. He has a brother, Lapo Elkann, and a sister, Ginevra Elkann. Elkann had attended primary school in both the United Kingdom, and Brazil, before his family moved to Paris, where he obtained a baccalauréat scientifique at the State School Lycée Victor-Duruy in 1994. Later that same year, he moved to Italy to attend the Polytechnic University of Turin, where he graduated with a degree in management engineering in 2000; his thesis was entirely dedicated to e-commerce and online auctions. Elkann has cited figures such as Gianluigi Gabetti, Sergio Marchionne, Warren Buffett, and the Wallenberg family as key influences on his education and early career. He is fluent in four languages: Italian, English, French, and Portuguese. Career In December 1997, at the age of 21, he was selected as the heir of his grandfather Gianni Agnelli in place of Giovanni Alberto Agnelli, the son of Gianni's younger brother, Umberto Agnelli, who had died at the age of 33. He was appointed to the Fiat S.p.A. board that same year, when he was 22, the same age his grandfather Gianni also joined it in 1943, and to the board of Giovanni Agnelli Sapaz (now Giovanni Agnelli B.V.), the family partnership controlling Exor. In 2000, after graduating in engineering from the Polytechnic University of Turin, he joined General Electric's Corporate Audit program. He left General Electric two years later; Elkann described his work at General Electric as "a beautiful experience, because you sit around a table where no one speaks your language and two out of three come from another continent." He moved back to Turin to be closer to his ageing grandfather, as well as to the family business. In 2003, Elkann joined IFIL, which later became Exor, where he was in charge of control and development, and was in particular responsible for supervising Rinascente and Alpitour. Elkann worked on the turnaround of Fiat Group. He was instrumental in the appointment of Fiat Chrysler Automobiles (FCA) CEO Sergio Marchionne in May 2004. After the death of Gianni Agnelli in 2003, which was followed by that of Elkann's great-uncle Umberto Agnelli in 2004, Elkann became vice-chairman of Fiat and vice-chairman of Giovanni Agnelli Sapaz. Franzo Grande Stevens and Gianluigi Gabetti were instrumental in the appointment of Elkann. In 2008, Elkann was seen as "the great unknown", and he replaced 83-year-old Gabetti as the head of IFIL, which managed a portfolio worth eight billion euros. In March 2009, he merged the holding companies IFI and IFIL to create Exor, stepping to the role of chairman. In 2010, he became chairman of Fiat S.p.A. (then FCA), succeeding Luca Cordero di Montezemolo, and chairman of the Giovanni Agnelli Sapaz, succeeding Gabetti; at the time, Fiat had changed four CEOs in three years. Before this appointment, he mainly played a background role at Fiat. The Financial Times characterized Elkann's appointment as "a confirmation of change that could prove to be the making of a new Fiat and also of the Agnelli family's future fortunes." In February 2011, Elkann was appointed chairman and CEO of Exor. The value of the company's assets has grown and multiplied nine times in ten years. Since 2017, Elkann became chairman of Ferrari, GEDI Gruppo Editoriale, and the Giovanni Agnelli Foundation [it], a philanthropic institution supporting education. He is an active member of several non-profit organizations and think tanks engaged in the global geopolitical debate, one of the founders of the Collège des Ingénieurs Italia, and a trustee of the Museum of Modern Art. A member of the Confindustria presidential committee, he followed Fiat's decision to leave the group and resigned from his role as vice-chairman in October 2011, three months before Fiat's official departure in January 2012, "in the interests of the Association's autonomy and independence", as written in his resignation letter to then-president Emma Marcegaglia. In a 2013 interview to the Detroit Free Press, Elkann identified Bill Ford Jr. as a mentor. That same year, he was included by Fortune in the world's most influential managers under the age of 40. In a November 2013 interview to Campden FB, Elkann said he wanted to change capitalism. He said: "There is an alternative to financial investors and professional investment managers, and that's what we want to be. You need to be able to portray business to society in a favourable way. All the emphasis has been on shareholder value, not stakeholder value. One of the benefits of family businesses is they focus on all stakeholders." In 2015, Elkann acquired the insurer company PartnerRe and took part in Ferrari’s debut as a listed company in stock exchange in Wall Street. Having previously held a seat on Rupert Murdoch's News Corp board and an inherited seat on the board of RCS Media Group, Elkann acquired a majority stake in The Economist Group in 2015; he was described as the opposite of fellow media mogul Silvio Berlusconi. Under Elkann's management, Exor purchased the controlling stake in GEDI Gruppo Editoriale from CIR Group for $113 million in 2019; GEDI is the owner of two of Italy's most influential newspapers, namely the Rome-based, liberal-leaning La Repubblica and the centrist, Turin-based La Stampa. In July 2018, a few days before the death of Marchionne, Elkann was chosen to take his place at Ferrari. In 2019, Elkann announced he would be trying to merge FCA with Peugeot S.A. (PSA Group), with the goal of forming the world's fourth largest OEM by volume and third largest by revenues, and catch up on electric cars, as well as autonomous vehicles. In May 2019, he tried to also enlist Renault. In December 2019, it was announced that FCA and Peugeot had reached an agreement to merge. In July 2020, he and FCA's CEO Mike Manley announced that the name of the combined company would be Stellantis. In March 2020, Elkann and FCA's board of directors agreed to forego their remaining compensation for 2020 due to the COVID-19 pandemic. Between December 2020 and September 2021, following the resignation of Louis Camilleri, he held the position of CEO of Ferrari until the appointment of Benedetto Vigna. In May 2021, Elkann was nominated Knight of the Order of Merit for Labour in the automotive industry by Italy's president Sergio Mattarella. In 2021, Forbes estimated his net worth to be around US$2 billion. In two January 2023 interviews to La Repubblica and La Stampa, in remembrance of the twenty years since Gianni's death, Elkann said: "If we compare the company in 2003 and today's we see that revenues go from 22 billion to 130 in the first nine months of 2022 alone; there were 22 car models produced then, which employed 49,000 people, for 4 brands: today 280,000 people produce over 100 models for 14 brands. We have enhanced the Fiat brand, so much so that next year the electric 500 will also be exported to the USA. We have relaunched the Maserati and Alfa Romeo brands and we are relaunching Lancia. Furthermore, today we produce in Italy and sell models of highly successful non-Italian brands, such as Jeep, all over the world." On 15 May 2023 he announced as a founder the launch of Lingotto, an investment management company fully owned by Exor and headquartered in London. In January 2025, Elkann was appointed a board director at Meta Platforms. Sports As CEO of Exor, Elkann represents the ownership of association football club Juventus. In 2010, Elkann supported his cousin Andrea Agnelli's bid to become chairman of Juventus. As Executive Chairman of Ferrari, Elkann holds a controlling interest in the auto racing team Scuderia Ferrari, the company's auto racing division, which competes in Formula One. The team returned to 24 Hours of Le Mans in 2023 after a fifty-year period of absence as a manufacturer and won the centenary edition of the race, repeating the victory in two subsequent years. Philanthropy Elkann is chairman of the Agnelli Foundation, a non-profit organization supporting education through scientific research and initiatives. Since 2014, Fondazione Agnelli has offered Italian students and their families a free online portal where they can find which secondary schools in their area provide the best preparation for university and the workplace. Together with Compagnia di San Paolo through Fondazione Agnelli he launched Torino fa scuola, a project dedicated to the renovation of school buildings in the city area. Starting from July 2020, Elkann supported the launch and expansion of the Arcipelago Educativo project, co-designed and promoted by the Agnelli Foundation, Exor, and Save the Children to fight the risk of dropping out of students due to the lockdown caused by the COVID-19 pandemic. In April 2019, along with CERN's Director-General Fabiola Gianotti and the Italian architect Renzo Piano, Elkann participated in a media event to unveil Science Gateway, a new scientific education and outreach centre of CERN, which aims to share knowledge and technology for free with society. The project was funded through external donations, through the Stellantis Foundation as the main supporter. On 21 June 2021 he celebrated a further step forward with the laying of the first stone, and then attended the official inauguration in October 2023, where he remembered Sergio Marchionne, to whom the auditorium of the structure is dedicated. In May 2019, Elkann took part in the 28th edition of the partita del cuore [it] to raise funds for the Piedmontese Foundation for Cancer Research and Italy's Telethon Foundation. In March 2020, to help Italian citizens suffering from the consequences of the COVID-19 pandemic, as the leader of the Agnelli family he deliberated a €10 million donation to the national Civil Protection Department and to La Stampa Foundation – Specchio dei tempi, a social assistance organization that operates in Piedmont, to respond to the local health and social needs in the city of Turin and Piedmont. Elkann and his wife Lavinia are also among the supporters of Crescere Insieme al Sant'Anna, a philanthropic project aiming at expanding and improving the neonatal intensive care unit of the main public pediatric hospital of Turin. On 9 May 2016, the first neonatal intensive care unit was inaugurated. Personal life Elkann was baptized and raised Roman Catholic. Nicknamed Jaki, or Yaki, he has lived in the United Kingdom, Brazil, France, and Italy. In 2004, he married Donna Lavinia Borromeo (born Lavinia Ida Borromeo-Arese on 19 March 1977 in Milan), a member of the prominent Italian aristocratic family the House of Borromeo. She is the daughter of Don Carlo Ferdinando Borromeo, Count of Arona, Piedmont (born in 1935), the son of Vitaliano Borromeo, 2nd Prince of Angera. Her half-sister is Beatrice Borromeo, the wife of Pierre Casiraghi, who is eighth in the line of succession to the Monegasque throne. They married on 4 September 2004 in a Catholic ceremony in the Cappella Bianca on Isola Madre, one of the Borromean Islands of Lake Maggiore. They have three children: Leone, Oceano, and Vita, and live in Turin. An engineer by training, he declares himself passionate about technology and pursues interests in this field. Since 2009, Elkann has been attending the annual media and tech conference organized in July every year by Allen & Co at Sun Valley, Idaho. He is also a regular contributor to the Google Camp, which every year gathers tech entrepreneurs, investors, representatives of institutions and pop stars in Sciacca, Agrigento, and other places around Sicily. In August 2011, he took part, along with Sergio Marchionne, in the Rimini Meeting organized by Communion and Liberation. Until 2020, he was a member of the board Bilderberg Group and the only Italian other than journalist Lilli Gruber. In 2012, Elkann attended the annual meeting of the Bilderberg Group in Chantilly, Virginia. In 2019 he personally supported through Exor and Gedi Gruppo Editoriale the creation of the Italian Tech Week, a tech conference for founders, investors, and industry leaders from around the world that, that over the years has hosted guests like Elon Musk, Patrick Collison, Brian Chesky, Sam Altman and Jeff Bezos. In February 2021, he was a guest on the Italian Tech Speak podcast, where he described his relationship with technology and innovation. In December 2021, he was included in Bloomberg's list of the "50 most influential people and ideas that defined global business in 2021" for the merger of FCA with the PSA Group to form Stellantis, which started its trading with a $52.7 billion market value. Through Exor Ventures (formerly known as Exor Seeds), an investment program dedicated to startups, he has invested over 500 million euros in innovation and entrepreneurship projects since 2018. Starting from 2022, through Vento, he is launching venture building calls specifically aimed at young entrepreneurs. A yachtsman, Elkann took part as owner in the March 2012 Miami–New York City crossing on a monohull of the Maserati team led by Giovanni Soldini [it], with the aim of covering 947 miles and setting a new record in the monohull category. In May 2012, he and his wife took part in the 30th historical reenactment of the Mille Miglia, a regularity race for historic cars dating back to 1927, which takes place on public roads from Brescia to Rome and back, across six regions of Italy. In 2013, Elkann participated in the Transpac Race from Los Angeles to Honolulu where he and Soldini ranked second. In the 2014 edition of Cape2Rio, which goes from Cape Town to Rio de Janeiro, Elkann was a member of the team of Soldini that won and set the new speed record of the regatta. In January 2015, he took part with Soldini in the Maserati team in the Rorc Caribbean 600 Race, a regatta that has been held since February throughout the Caribbean; the team had to retire due to damage to the hydraulic system. Soldini stated that a new San Francisco–Shanghai record attempt with the Maserati was expected in May 2015. They succeeded in doing so at 21 days, 19 hours, 32 minutes, and 54 seconds. In May 2016, Elkann took part in the 100th edition of the Targa Florio car race in Palermo. In January 2020, he participated in the 16th edition of the Cape2Rio aboard Soldini's VOR70 Maserati, sailing 3.600 miles from Cape Town to Rio de Janeiro. In October 2020, once again aboard with Soldini, he won the 41st edition of the Rolex Middle Sea Race with the Maserati Multi 70. In August 2021, he kicked off the 89th edition of the 24 Hours of Le Mans, which saw the participation of the new Le Mans Hypercar, a class in which Ferrari would enter starting from 2023. Offices Elkann is the chief executive officer of Exor, the chairman of Stellantis, general partner of Giovanni Agnelli B.V., and the executive chairman of Ferrari. Additionally, he is the chairman of the Giovanni Agnelli Foundation. He is also a trustee of MOMA, a member of Pinacoteca Giovanni e Marella Agnelli, and was a member of the Bilderberg Group. Elkann is a member of the JP Morgan International Council, a board member of Meta Platforms, and was vice-chairman of Italy's Aspen Institute. Awards and honours Ancestry Notes References Bibliography External links |
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File:United States Capitol west front edit2.jpg Summary This image has multiple extracted files: Licensing Appreciate the flag flying over the Senate; this indicates that the Senate is: in session. Appreciate that the flag is not flying over the House of Representatives; this indicates that the House is not in session. File history Click on a date/time to view the file as it appeared at that time. File usage The following 19 pages use this file: Global file usage The following other wikis use this file: View more global usage of this file. Metadata This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file. |
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Contents Mughallis Mughallis (Arabic: مٌغلّس) was a Palestinian Arab village located 30.5 kilometers (19.0 mi) northwest of Hebron. It was depopulated during the 1948 Arab-Israeli War between July 9–10, 1948 as part of Operation An-Far. History It was incorporated into the Ottoman Empire in 1517 with the rest of Palestine, and by the 1596 tax records it was located it nahiya (subdistrict) of Gaza, part of Gaza Sanjak, with a population of 77 household, an estimated 424 persons, all Muslims. The villagers paid a fixed tax-rate of 25% on agricultural products, including wheat, barley, summer crops, fruit trees, goats and beehives, in addition to occasional revenues; a total of 10,350 akçe. All of the revenue went to a Waqf. In May 1863 Victor Guérin described it as a hamlet, still inhabited by a few families, and was designated to him by the name of Deir al Mokhalles, which Guérin translated as the Convent of the Saviour. He noted that the name probably derived from a former convent, which formerly existed at the place. An Ottoman village list of about 1870 showed that Meghallis had 27 houses and a population of 71, though the population count included men, only. In 1882, the PEF's Survey of Western Palestine (SWP) described Mughullis as: "A village of moderate size, approached by an ancient road, and principally consisting of stone houses." In the 1922 census of Palestine, conducted by the British Mandate for Palestine, the population was recorded as 311 Muslims, increasing in the 1931 census to 447 Muslims, in 93 houses. In the 1945 statistics it had a population of 540 Muslims, with 11,459 dunams of land. 88 dunams were plantations and irrigable land, 7,277 for cereals, while 23 dunams were built-up (urban) land. Mughallis became depopulated on July 9–10, 1948. On 16 July, Giv‘ati HQ informed General Staff\Operations that "our forces have entered the villages of Qazaza, Kheima, Jilya, ‘Idnibba and Mughallis, expelled the inhabitants, [and] blown up and torched a number of houses. The area is at the moment clear of Arabs." The IDF were instructed to prevent infiltration to Summeil, Barqusya, Bi‘lin, Masmiya al Saghira, al Tina, Kheima, Idnibba, Jilya, Qazaza, and Mughallis. The orders specifically were to "destroy" any "armed force" encountered and to "expel.....unarmed villagers". During the following days, patrols expelled refugees near Tel as Safi, al Tina, and Mughallis, apparently killing three of those initially detained. In mid August 1948, a Giv‘ati patrol re-visited Idnibba, Mughallis, Jilya, Qazaza and Sajd, killing "a handful of Arabs" in a number of clashes. In 1955 Gefen was founded on village land, north of the village site. In 1992 the village site was described: "The site and surrounding area are fenced in. The debris from the houses have been levelled, and one can still see building components. Remnants of a house on the east side are ringed by stone markers that formerly identified the boundaries of a home garden. Numerous trees, including olive and carob trees, grow on all sides and cactuses are found on the northern and southern edges." References Bibliography External links |
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[SOURCE: https://en.wikipedia.org/wiki/Black_hole#cite_note-143] | [TOKENS: 13839] |
Contents Black hole A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping. Albert Einstein's theory of general relativity predicts that a sufficiently compact mass will form a black hole. The boundary of no escape is called the event horizon. In general relativity, a black hole's event horizon seals an object's fate but produces no locally detectable change when crossed. General relativity also predicts that every black hole should have a central singularity, where the curvature of spacetime is infinite. In many ways, a black hole acts like an ideal black body, as it reflects no light. Quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly. Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace. In 1916, Karl Schwarzschild found the first modern solution of general relativity that would characterise a black hole. Due to his influential research, the Schwarzschild metric is named after him. David Finkelstein, in 1958, first interpreted Schwarzschild's model as a region of space from which nothing can escape. Black holes were long considered a mathematical curiosity; it was not until the 1960s that theoretical work showed they were a generic prediction of general relativity. The first black hole known was Cygnus X-1, identified by several researchers independently in 1971. Black holes typically form when massive stars collapse at the end of their life cycle. After a black hole has formed, it can grow by absorbing mass from its surroundings. Supermassive black holes of millions of solar masses may form by absorbing other stars and merging with other black holes, or via direct collapse of gas clouds. There is consensus that supermassive black holes exist in the centres of most galaxies. The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Matter falling toward a black hole can form an accretion disk of infalling plasma, heated by friction and emitting light. In extreme cases, this creates a quasar, some of the brightest objects in the universe. Merging black holes can also be detected by observation of the gravitational waves they emit. If other stars are orbiting a black hole, their orbits can be used to determine the black hole's mass and location. Such observations can be used to exclude possible alternatives such as neutron stars. In this way, astronomers have identified numerous stellar black hole candidates in binary systems and established that the radio source known as Sagittarius A*, at the core of the Milky Way galaxy, contains a supermassive black hole of about 4.3 million solar masses. History The idea of a body so massive that even light could not escape was first proposed in the late 18th century by English astronomer and clergyman John Michell and independently by French scientist Pierre-Simon Laplace. Both scholars proposed very large stars in contrast to the modern concept of an extremely dense object. Michell's idea, in a short part of a letter published in 1784, calculated that a star with the same density but 500 times the radius of the sun would not let any emitted light escape; the surface escape velocity would exceed the speed of light.: 122 Michell correctly hypothesized that such supermassive but non-radiating bodies might be detectable through their gravitational effects on nearby visible bodies. In 1796, Laplace mentioned that a star could be invisible if it were sufficiently large while speculating on the origin of the Solar System in his book Exposition du Système du Monde. Franz Xaver von Zach asked Laplace for a mathematical analysis, which Laplace provided and published in a journal edited by von Zach. In 1905, Albert Einstein showed that the laws of electromagnetism would be invariant under a Lorentz transformation: they would be identical for observers travelling at different velocities relative to each other. This discovery became known as the principle of special relativity. Although the laws of mechanics had already been shown to be invariant, gravity remained yet to be included.: 19 In 1907, Einstein published a paper proposing his equivalence principle, the hypothesis that inertial mass and gravitational mass have a common cause. Using the principle, Einstein predicted the redshift and half of the lensing effect of gravity on light; the full prediction of gravitational lensing required development of general relativity.: 19 By 1915, Einstein refined these ideas into his general theory of relativity, which explained how matter affects spacetime, which in turn affects the motion of other matter. This formed the basis for black hole physics. Only a few months after Einstein published the field equations describing general relativity, astrophysicist Karl Schwarzschild set out to apply the idea to stars. He assumed spherical symmetry with no spin and found a solution to Einstein's equations.: 124 A few months after Schwarzschild, Johannes Droste, a student of Hendrik Lorentz, independently gave the same solution. At a certain radius from the center of the mass, the Schwarzschild solution became singular, meaning that some of the terms in the Einstein equations became infinite. The nature of this radius, which later became known as the Schwarzschild radius, was not understood at the time. Many physicists of the early 20th century were skeptical of the existence of black holes. In a 1926 popular science book, Arthur Eddington critiqued the idea of a star with mass compressed to its Schwarzschild radius as a flaw in the then-poorly-understood theory of general relativity.: 134 In 1939, Einstein himself used his theory of general relativity in an attempt to prove that black holes were impossible. His work relied on increasing pressure or increasing centrifugal force balancing the force of gravity so that the object would not collapse beyond its Schwarzschild radius. He missed the possibility that implosion would drive the system below this critical value.: 135 By the 1920s, astronomers had classified a number of white dwarf stars as too cool and dense to be explained by the gradual cooling of ordinary stars. In 1926, Ralph Fowler showed that quantum-mechanical degeneracy pressure was larger than thermal pressure at these densities.: 145 In 1931, Subrahmanyan Chandrasekhar calculated that a non-rotating body of electron-degenerate matter below a certain limiting mass is stable, and by 1934 he showed that this explained the catalog of white dwarf stars.: 151 When Chandrasekhar announced his results, Eddington pointed out that stars above this limit would radiate until they were sufficiently dense to prevent light from exiting, a conclusion he considered absurd. Eddington and, later, Lev Landau argued that some yet unknown mechanism would stop the collapse. In the 1930s, Fritz Zwicky and Walter Baade studied stellar novae, focusing on exceptionally bright ones they called supernovae. Zwicky promoted the idea that supernovae produced stars with the density of atomic nuclei—neutron stars—but this idea was largely ignored.: 171 In 1939, based on Chandrasekhar's reasoning, J. Robert Oppenheimer and George Volkoff predicted that neutron stars below a certain mass limit, later called the Tolman–Oppenheimer–Volkoff limit, would be stable due to neutron degeneracy pressure. Above that limit, they reasoned that either their model would not apply or that gravitational contraction would not stop.: 380 John Archibald Wheeler and two of his students resolved questions about the model behind the Tolman–Oppenheimer–Volkoff (TOV) limit. Harrison and Wheeler developed the equations of state relating density to pressure for cold matter all the way through electron degeneracy and neutron degeneracy. Masami Wakano and Wheeler then used the equations to compute the equilibrium curve for stars, relating mass to circumference. They found no additional features that would invalidate the TOV limit. This meant that the only thing that could prevent black holes from forming was a dynamic process ejecting sufficient mass from a star as it cooled.: 205 The modern concept of black holes was formulated by Robert Oppenheimer and his student Hartland Snyder in 1939.: 80 In the paper, Oppenheimer and Snyder solved Einstein's equations of general relativity for an idealized imploding star, in a model later called the Oppenheimer–Snyder model, then described the results from far outside the star. The implosion starts as one might expect: the star material rapidly collapses inward. However, as the density of the star increases, gravitational time dilation increases and the collapse, viewed from afar, seems to slow down further and further until the star reaches its Schwarzschild radius, where it appears frozen in time.: 217 In 1958, David Finkelstein identified the Schwarzschild surface as an event horizon, calling it "a perfect unidirectional membrane: causal influences can cross it in only one direction". In this sense, events that occur inside of the black hole cannot affect events that occur outside of the black hole. Finkelstein created a new reference frame to include the point of view of infalling observers.: 103 Finkelstein's new frame of reference allowed events at the surface of an imploding star to be related to events far away. By 1962 the two points of view were reconciled, convincing many skeptics that implosion into a black hole made physical sense.: 226 The era from the mid-1960s to the mid-1970s was the "golden age of black hole research", when general relativity and black holes became mainstream subjects of research.: 258 In this period, more general black hole solutions were found. In 1963, Roy Kerr found the exact solution for a rotating black hole. Two years later, Ezra Newman found the cylindrically symmetric solution for a black hole that is both rotating and electrically charged. In 1967, Werner Israel found that the Schwarzschild solution was the only possible solution for a nonspinning, uncharged black hole, meaning that a Schwarzschild black hole would be defined by its mass alone. Similar identities were later found for Reissner-Nordstrom and Kerr black holes, defined only by their mass and their charge or spin respectively. Together, these findings became known as the no-hair theorem, which states that a stationary black hole is completely described by the three parameters of the Kerr–Newman metric: mass, angular momentum, and electric charge. At first, it was suspected that the strange mathematical singularities found in each of the black hole solutions only appeared due to the assumption that a black hole would be perfectly spherically symmetric, and therefore the singularities would not appear in generic situations where black holes would not necessarily be symmetric. This view was held in particular by Vladimir Belinski, Isaak Khalatnikov, and Evgeny Lifshitz, who tried to prove that no singularities appear in generic solutions, although they would later reverse their positions. However, in 1965, Roger Penrose proved that general relativity without quantum mechanics requires that singularities appear in all black holes. Astronomical observations also made great strides during this era. In 1967, Antony Hewish and Jocelyn Bell Burnell discovered pulsars and by 1969, these were shown to be rapidly rotating neutron stars. Until that time, neutron stars, like black holes, were regarded as just theoretical curiosities, but the discovery of pulsars showed their physical relevance and spurred a further interest in all types of compact objects that might be formed by gravitational collapse. Based on observations in Greenwich and Toronto in the early 1970s, Cygnus X-1, a galactic X-ray source discovered in 1964, became the first astronomical object commonly accepted to be a black hole. Work by James Bardeen, Jacob Bekenstein, Carter, and Hawking in the early 1970s led to the formulation of black hole thermodynamics. These laws describe the behaviour of a black hole in close analogy to the laws of thermodynamics by relating mass to energy, area to entropy, and surface gravity to temperature. The analogy was completed: 442 when Hawking, in 1974, showed that quantum field theory implies that black holes should radiate like a black body with a temperature proportional to the surface gravity of the black hole, predicting the effect now known as Hawking radiation. While Cygnus X-1, a stellar-mass black hole, was generally accepted by the scientific community as a black hole by the end of 1973, it would be decades before a supermassive black hole would gain the same broad recognition. Although, as early as the 1960s, physicists such as Donald Lynden-Bell and Martin Rees had suggested that powerful quasars in the center of galaxies were powered by accreting supermassive black holes, little observational proof existed at the time. However, the Hubble Space Telescope, launched decades later, found that supermassive black holes were not only present in these active galactic nuclei, but that supermassive black holes in the center of galaxies were ubiquitous: Almost every galaxy had a supermassive black hole at its center, many of which were quiescent. In 1999, David Merritt proposed the M–sigma relation, which related the dispersion of the velocity of matter in the center bulge of a galaxy to the mass of the supermassive black hole at its core. Subsequent studies confirmed this correlation. Around the same time, based on telescope observations of the velocities of stars at the center of the Milky Way galaxy, independent work groups led by Andrea Ghez and Reinhard Genzel concluded that the compact radio source in the center of the galaxy, Sagittarius A*, was likely a supermassive black hole. On 11 February 2016, the LIGO Scientific Collaboration and Virgo Collaboration announced the first direct detection of gravitational waves, named GW150914, representing the first observation of a black hole merger. At the time of the merger, the black holes were approximately 1.4 billion light-years away from Earth and had masses of 30 and 35 solar masses.: 6 In 2017, Rainer Weiss, Kip Thorne, and Barry Barish, who had spearheaded the project, were awarded the Nobel Prize in Physics for their work. Since the initial discovery in 2015, hundreds more gravitational waves have been observed by LIGO and another interferometer, Virgo. On 10 April 2019, the first direct image of a black hole and its vicinity was published, following observations made by the Event Horizon Telescope (EHT) in 2017 of the supermassive black hole in Messier 87's galactic centre. In 2022, the Event Horizon Telescope collaboration released an image of the black hole in the center of the Milky Way galaxy, Sagittarius A*; The data had been collected in 2017. In 2020, the Nobel Prize in Physics was awarded for work on black holes. Andrea Ghez and Reinhard Genzel shared one-half for their discovery that Sagittarius A* is a supermassive black hole. Penrose received the other half for his work showing that the mathematics of general relativity requires the formation of black holes. Cosmologists lamented that Hawking's extensive theoretical work on black holes would not be honored since he died in 2018. In December 1967, a student reportedly suggested the phrase black hole at a lecture by John Wheeler; Wheeler adopted the term for its brevity and "advertising value", and Wheeler's stature in the field ensured it quickly caught on, leading some to credit Wheeler with coining the phrase. However, the term was used by others around that time. Science writer Marcia Bartusiak traces the term black hole to physicist Robert H. Dicke, who in the early 1960s reportedly compared the phenomenon to the Black Hole of Calcutta, notorious as a prison where people entered but never left alive. The term was used in print by Life and Science News magazines in 1963, and by science journalist Ann Ewing in her article "'Black Holes' in Space", dated 18 January 1964, which was a report on a meeting of the American Association for the Advancement of Science held in Cleveland, Ohio. Definition A black hole is generally defined as a region of spacetime from which no information-carrying signals or objects can escape. However, verifying an object as a black hole by this definition would require waiting for an infinite time and at an infinite distance from the black hole to verify that indeed, nothing has escaped, and thus cannot be used to identify a physical black hole. Broadly, physicists do not have a precisely-agreed-upon definition of a black hole. Among astrophysicists, a black hole is a compact object with a mass larger than four solar masses. A black hole may also be defined as a reservoir of information: 142 or a region where space is falling inwards faster than the speed of light. Properties The no-hair theorem postulates that, once it achieves a stable condition after formation, a black hole has only three independent physical properties: mass, electric charge, and angular momentum; the black hole is otherwise featureless. If the conjecture is true, any two black holes that share the same values for these properties, or parameters, are indistinguishable from one another. The degree to which the conjecture is true for real black holes is currently an unsolved problem. The simplest static black holes have mass but neither electric charge nor angular momentum. According to Birkhoff's theorem, these Schwarzschild black holes are the only vacuum solution that is spherically symmetric. Solutions describing more general black holes also exist. Non-rotating charged black holes are described by the Reissner–Nordström metric, while the Kerr metric describes a non-charged rotating black hole. The most general stationary black hole solution known is the Kerr–Newman metric, which describes a black hole with both charge and angular momentum. The simplest static black holes have mass but neither electric charge nor angular momentum. Contrary to the popular notion of a black hole "sucking in everything" in its surroundings, from far away, the external gravitational field of a black hole is identical to that of any other body of the same mass. While a black hole can theoretically have any positive mass, the charge and angular momentum are constrained by the mass. The total electric charge Q and the total angular momentum J are expected to satisfy the inequality Q 2 4 π ϵ 0 + c 2 J 2 G M 2 ≤ G M 2 {\displaystyle {\frac {Q^{2}}{4\pi \epsilon _{0}}}+{\frac {c^{2}J^{2}}{GM^{2}}}\leq GM^{2}} for a black hole of mass M. Black holes with the maximum possible charge or spin satisfying this inequality are called extremal black holes. Solutions of Einstein's equations that violate this inequality exist, but they do not possess an event horizon. These are so-called naked singularities that can be observed from the outside. Because these singularities make the universe inherently unpredictable, many physicists believe they could not exist. The weak cosmic censorship hypothesis, proposed by Sir Roger Penrose, rules out the formation of such singularities, when they are created through the gravitational collapse of realistic matter. However, this theory has not yet been proven, and some physicists believe that naked singularities could exist. It is also unknown whether black holes could even become extremal, forming naked singularities, since natural processes counteract increasing spin and charge when a black hole becomes near-extremal. The total mass of a black hole can be estimated by analyzing the motion of objects near the black hole, such as stars or gas. All black holes spin, often fast—One supermassive black hole, GRS 1915+105 has been estimated to spin at over 1,000 revolutions per second. The Milky Way's central black hole Sagittarius A* rotates at about 90% of the maximum rate. The spin rate can be inferred from measurements of atomic spectral lines in the X-ray range. As gas near the black hole plunges inward, high energy X-ray emission from electron-positron pairs illuminates the gas further out, appearing red-shifted due to relativistic effects. Depending on the spin of the black hole, this plunge happens at different radii from the hole, with different degrees of redshift. Astronomers can use the gap between the x-ray emission of the outer disk and the redshifted emission from plunging material to determine the spin of the black hole. A newer way to estimate spin is based on the temperature of gasses accreting onto the black hole. The method requires an independent measurement of the black hole mass and inclination angle of the accretion disk followed by computer modeling. Gravitational waves from coalescing binary black holes can also provide the spin of both progenitor black holes and the merged hole, but such events are rare. A spinning black hole has angular momentum. The supermassive black hole in the center of the Messier 87 (M87) galaxy appears to have an angular momentum very close to the maximum theoretical value. That uncharged limit is J ≤ G M 2 c , {\displaystyle J\leq {\frac {GM^{2}}{c}},} allowing definition of a dimensionless spin magnitude such that 0 ≤ c J G M 2 ≤ 1. {\displaystyle 0\leq {\frac {cJ}{GM^{2}}}\leq 1.} Most black holes are believed to have an approximately neutral charge. For example, Michal Zajaček, Arman Tursunov, Andreas Eckart, and Silke Britzen found the electric charge of Sagittarius A* to be at least ten orders of magnitude below the theoretical maximum. A charged black hole repels other like charges just like any other charged object. If a black hole were to become charged, particles with an opposite sign of charge would be pulled in by the extra electromagnetic force, while particles with the same sign of charge would be repelled, neutralizing the black hole. This effect may not be as strong if the black hole is also spinning. The presence of charge can reduce the diameter of the black hole by up to 38%. The charge Q for a nonspinning black hole is bounded by Q ≤ G M , {\displaystyle Q\leq {\sqrt {G}}M,} where G is the gravitational constant and M is the black hole's mass. Classification Black holes can have a wide range of masses. The minimum mass of a black hole formed by stellar gravitational collapse is governed by the maximum mass of a neutron star and is believed to be approximately two-to-four solar masses. However, theoretical primordial black holes, believed to have formed soon after the Big Bang, could be far smaller, with masses as little as 10−5 grams at formation. These very small black holes are sometimes called micro black holes. Black holes formed by stellar collapse are called stellar black holes. Estimates of their maximum mass at formation vary, but generally range from 10 to 100 solar masses, with higher estimates for black holes progenated by low-metallicity stars. The mass of a black hole formed via a supernova has a lower bound: If the progenitor star is too small, the collapse may be stopped by the degeneracy pressure of the star's constituents, allowing the condensation of matter into an exotic denser state. Degeneracy pressure occurs from the Pauli exclusion principle—Particles will resist being in the same place as each other. Smaller progenitor stars, with masses less than about 8 M☉, will be held together by the degeneracy pressure of electrons and will become a white dwarf. For more massive progenitor stars, electron degeneracy pressure is no longer strong enough to resist the force of gravity and the star will be held together by neutron degeneracy pressure, which can occur at much higher densities, forming a neutron star. If the star is still too massive, even neutron degeneracy pressure will not be able to resist the force of gravity and the star will collapse into a black hole.: 5.8 Stellar black holes can also gain mass via accretion of nearby matter, often from a companion object such as a star. Black holes that are larger than stellar black holes but smaller than supermassive black holes are called intermediate-mass black holes, with masses of approximately 102 to 105 solar masses. These black holes seem to be rarer than their stellar and supermassive counterparts, with relatively few candidates having been observed. Physicists have speculated that such black holes may form from collisions in globular and star clusters or at the center of low-mass galaxies. They may also form as the result of mergers of smaller black holes, with several LIGO observations finding merged black holes within the 110-350 solar mass range. The black holes with the largest masses are called supermassive black holes, with masses more than 106 times that of the Sun. These black holes are believed to exist at the centers of almost every large galaxy, including the Milky Way. Some scientists have proposed a subcategory of even larger black holes, called ultramassive black holes, with masses greater than 109-1010 solar masses. Theoretical models predict that the accretion disc that feeds black holes will be unstable once a black hole reaches 50-100 billion times the mass of the Sun, setting a rough upper limit to black hole mass. Structure While black holes are conceptually invisible sinks of all matter and light, in astronomical settings, their enormous gravity alters the motion of surrounding objects and pulls nearby gas inwards at near-light speed, making the area around black holes the brightest objects in the universe. Some black holes have relativistic jets—thin streams of plasma travelling away from the black hole at more than one-tenth of the speed of light. A small faction of the matter falling towards the black hole gets accelerated away along the hole rotation axis. These jets can extend as far as millions of parsecs from the black hole itself. Black holes of any mass can have jets. However, they are typically observed around spinning black holes with strongly-magnetized accretion disks. Relativistic jets were more common in the early universe, when galaxies and their corresponding supermassive black holes were rapidly gaining mass. All black holes with jets also have an accretion disk, but the jets are usually brighter than the disk. Quasars, typically found in other galaxies, are believed to be supermassive black holes with jets; microquasars are believed to be stellar-mass objects with jets, typically observed in the Milky Way. The mechanism of formation of jets is not yet known, but several options have been proposed. One method proposed to fuel these jets is the Blandford-Znajek process, which suggests that the dragging of magnetic field lines by a black hole's rotation could launch jets of matter into space. The Penrose process, which involves extraction of a black hole's rotational energy, has also been proposed as a potential mechanism of jet propulsion. Due to conservation of angular momentum, gas falling into the gravitational well created by a massive object will typically form a disk-like structure around the object.: 242 As the disk's angular momentum is transferred outward due to internal processes, its matter falls farther inward, converting its gravitational energy into heat and releasing a large flux of x-rays. The temperature of these disks can range from thousands to millions of Kelvin, and temperatures can differ throughout a single accretion disk. Accretion disks can also emit in other parts of the electromagnetic spectrum, depending on the disk's turbulence and magnetization and the black hole's mass and angular momentum. Accretion disks can be defined as geometrically thin or geometrically thick. Geometrically thin disks are mostly confined to the black hole's equatorial plane and have a well-defined edge at the innermost stable circular orbit (ISCO), while geometrically thick disks are supported by internal pressure and temperature and can extend inside the ISCO. Disks with high rates of electron scattering and absorption, appearing bright and opaque, are called optically thick; optically thin disks are more translucent and produce fainter images when viewed from afar. Accretion disks of black holes accreting beyond the Eddington limit are often referred to as polish donuts due to their thick, toroidal shape that resembles that of a donut. Quasar accretion disks are expected to usually appear blue in color. The disk for a stellar black hole, on the other hand, would likely look orange, yellow, or red, with its inner regions being the brightest. Theoretical research suggests that the hotter a disk is, the bluer it should be, although this is not always supported by observations of real astronomical objects. Accretion disk colors may also be altered by the Doppler effect, with the part of the disk travelling towards an observer appearing bluer and brighter and the part of the disk travelling away from the observer appearing redder and dimmer. In Newtonian gravity, test particles can stably orbit at arbitrary distances from a central object. In general relativity, however, there exists a smallest possible radius for which a massive particle can orbit stably. Any infinitesimal inward perturbations to this orbit will lead to the particle spiraling into the black hole, and any outward perturbations will, depending on the energy, cause the particle to spiral in, move to a stable orbit further from the black hole, or escape to infinity. This orbit is called the innermost stable circular orbit, or ISCO. The location of the ISCO depends on the spin of the black hole and the spin of the particle itself. In the case of a Schwarzschild black hole (spin zero) and a particle without spin, the location of the ISCO is: r I S C O = 3 r s = 6 G M c 2 , {\displaystyle r_{\rm {ISCO}}=3\,r_{\text{s}}={\frac {6\,GM}{c^{2}}},} where r I S C O {\displaystyle r_{\rm {_{ISCO}}}} is the radius of the ISCO, r s {\displaystyle r_{\text{s}}} is the Schwarzschild radius of the black hole, G {\displaystyle G} is the gravitational constant, and c {\displaystyle c} is the speed of light. The radius of this orbit changes slightly based on particle spin. For charged black holes, the ISCO moves inwards. For spinning black holes, the ISCO is moved inwards for particles orbiting in the same direction that the black hole is spinning (prograde) and outwards for particles orbiting in the opposite direction (retrograde). For example, the ISCO for a particle orbiting retrograde can be as far out as about 9 r s {\displaystyle 9r_{\text{s}}} , while the ISCO for a particle orbiting prograde can be as close as at the event horizon itself. The photon sphere is a spherical boundary for which photons moving on tangents to that sphere are bent completely around the black hole, possibly orbiting multiple times. Light rays with impact parameters less than the radius of the photon sphere enter the black hole. For Schwarzschild black holes, the photon sphere has a radius 1.5 times the Schwarzschild radius; the radius for non-Schwarzschild black holes is at least 1.5 times the radius of the event horizon. When viewed from a great distance, the photon sphere creates an observable black hole shadow. Since no light emerges from within the black hole, this shadow is the limit for possible observations.: 152 The shadow of colliding black holes should have characteristic warped shapes, allowing scientists to detect black holes that are about to merge. While light can still escape from the photon sphere, any light that crosses the photon sphere on an inbound trajectory will be captured by the black hole. Therefore, any light that reaches an outside observer from the photon sphere must have been emitted by objects between the photon sphere and the event horizon. Light emitted towards the photon sphere may also curve around the black hole and return to the emitter. For a rotating, uncharged black hole, the radius of the photon sphere depends on the spin parameter and whether the photon is orbiting prograde or retrograde. For a photon orbiting prograde, the photon sphere will be 1-3 Schwarzschild radii from the center of the black hole, while for a photon orbiting retrograde, the photon sphere will be between 3-5 Schwarzschild radii from the center of the black hole. The exact location of the photon sphere depends on the magnitude of the black hole's rotation. For a charged, nonrotating black hole, there will only be one photon sphere, and the radius of the photon sphere will decrease for increasing black hole charge. For non-extremal, charged, rotating black holes, there will always be two photon spheres, with the exact radii depending on the parameters of the black hole. Near a rotating black hole, spacetime rotates similar to a vortex. The rotating spacetime will drag any matter and light into rotation around the spinning black hole. This effect of general relativity, called frame dragging, gets stronger closer to the spinning mass. The region of spacetime in which it is impossible to stay still is called the ergosphere. The ergosphere of a black hole is a volume bounded by the black hole's event horizon and the ergosurface, which coincides with the event horizon at the poles but bulges out from it around the equator. Matter and radiation can escape from the ergosphere. Through the Penrose process, objects can emerge from the ergosphere with more energy than they entered with. The extra energy is taken from the rotational energy of the black hole, slowing down the rotation of the black hole.: 268 A variation of the Penrose process in the presence of strong magnetic fields, the Blandford–Znajek process, is considered a likely mechanism for the enormous luminosity and relativistic jets of quasars and other active galactic nuclei. The observable region of spacetime around a black hole closest to its event horizon is called the plunging region. In this area it is no longer possible for free falling matter to follow circular orbits or stop a final descent into the black hole. Instead, it will rapidly plunge toward the black hole at close to the speed of light, growing increasingly hot and producing a characteristic, detectable thermal emission. However, light and radiation emitted from this region can still escape from the black hole's gravitational pull. For a nonspinning, uncharged black hole, the radius of the event horizon, or Schwarzschild radius, is proportional to the mass, M, through r s = 2 G M c 2 ≈ 2.95 M M ⊙ k m , {\displaystyle r_{\mathrm {s} }={\frac {2GM}{c^{2}}}\approx 2.95\,{\frac {M}{M_{\odot }}}~\mathrm {km,} } where rs is the Schwarzschild radius and M☉ is the mass of the Sun.: 124 For a black hole with nonzero spin or electric charge, the radius is smaller,[Note 1] until an extremal black hole could have an event horizon close to r + = G M c 2 , {\displaystyle r_{\mathrm {+} }={\frac {GM}{c^{2}}},} half the radius of a nonspinning, uncharged black hole of the same mass. Since the volume within the Schwarzschild radius increase with the cube of the radius, average density of a black hole inside its Schwarzschild radius is inversely proportional to the square of its mass: supermassive black holes are much less dense than stellar black holes. The average density of a 108 M☉ black hole is comparable to that of water. The defining feature of a black hole is the existence of an event horizon, a boundary in spacetime through which matter and light can pass only inward towards the center of the black hole. Nothing, not even light, can escape from inside the event horizon. The event horizon is referred to as such because if an event occurs within the boundary, information from that event cannot reach or affect an outside observer, making it impossible to determine whether such an event occurred.: 179 For non-rotating black holes, the geometry of the event horizon is precisely spherical, while for rotating black holes, the event horizon is oblate. To a distant observer, a clock near a black hole would appear to tick more slowly than one further from the black hole.: 217 This effect, known as gravitational time dilation, would also cause an object falling into a black hole to appear to slow as it approached the event horizon, never quite reaching the horizon from the perspective of an outside observer.: 218 All processes on this object would appear to slow down, and any light emitted by the object to appear redder and dimmer, an effect known as gravitational redshift. An object falling from half of a Schwarzschild radius above the event horizon would fade away until it could no longer be seen, disappearing from view within one hundredth of a second. It would also appear to flatten onto the black hole, joining all other material that had ever fallen into the hole. On the other hand, an observer falling into a black hole would not notice any of these effects as they cross the event horizon. Their own clocks appear to them to tick normally, and they cross the event horizon after a finite time without noting any singular behaviour. In general relativity, it is impossible to determine the location of the event horizon from local observations, due to Einstein's equivalence principle.: 222 Black holes that are rotating and/or charged have an inner horizon, often called the Cauchy horizon, inside of the black hole. The inner horizon is divided up into two segments: an ingoing section and an outgoing section. At the ingoing section of the Cauchy horizon, radiation and matter that fall into the black hole would build up at the horizon, causing the curvature of spacetime to go to infinity. This would cause an observer falling in to experience tidal forces. This phenomenon is often called mass inflation, since it is associated with a parameter dictating the black hole's internal mass growing exponentially, and the buildup of tidal forces is called the mass-inflation singularity or Cauchy horizon singularity. Some physicists have argued that in realistic black holes, accretion and Hawking radiation would stop mass inflation from occurring. At the outgoing section of the inner horizon, infalling radiation would backscatter off of the black hole's spacetime curvature and travel outward, building up at the outgoing Cauchy horizon. This would cause an infalling observer to experience a gravitational shock wave and tidal forces as the spacetime curvature at the horizon grew to infinity. This buildup of tidal forces is called the shock singularity. Both of these singularities are weak, meaning that an object crossing them would only be deformed a finite amount by tidal forces, even though the spacetime curvature would still be infinite at the singularity. This is as opposed to a strong singularity, where an object hitting the singularity would be stretched and squeezed by an infinite amount. They are also null singularities, meaning that a photon could travel parallel to the them without ever being intercepted. Ignoring quantum effects, every black hole has a singularity inside, points where the curvature of spacetime becomes infinite, and geodesics terminate within a finite proper time.: 205 For a non-rotating black hole, this region takes the shape of a single point; for a rotating black hole it is smeared out to form a ring singularity that lies in the plane of rotation.: 264 In both cases, the singular region has zero volume. All of the mass of the black hole ends up in the singularity.: 252 Since the singularity has nonzero mass in an infinitely small space, it can be thought of as having infinite density. Observers falling into a Schwarzschild black hole (i.e., non-rotating and not charged) cannot avoid being carried into the singularity once they cross the event horizon. As they fall further into the black hole, they will be torn apart by the growing tidal forces in a process sometimes referred to as spaghettification or the noodle effect. Eventually, they will reach the singularity and be crushed into an infinitely small point.: 182 However any perturbations, such as those caused by matter or radiation falling in, would cause space to oscillate chaotically near the singularity. Any matter falling in would experience intense tidal forces rapidly changing in direction, all while being compressed into an increasingly small volume. Alternative forms of general relativity, including addition of some quatum effects, can lead to regular, or nonsingular, black holes without singularities. For example, the fuzzball model, based on string theory, states that black holes are actually made up of quantum microstates and need not have a singularity or an event horizon. The theory of loop quantum gravity proposes that the curvature and density at the center of a black hole is large, but not infinite. Formation Black holes are formed by gravitational collapse of massive stars, either by direct collapse or during a supernova explosion in a process called fallback. Black holes can result from the merger of two neutron stars or a neutron star and a black hole. Other more speculative mechanisms include primordial black holes created from density fluctuations in the early universe, the collapse of dark stars, a hypothetical object powered by annihilation of dark matter, or from hypothetical self-interacting dark matter. Gravitational collapse occurs when an object's internal pressure is insufficient to resist the object's own gravity. At the end of a star's life, it will run out of hydrogen to fuse, and will start fusing more and more massive elements, until it gets to iron. Since the fusion of elements heavier than iron would require more energy than it would release, nuclear fusion ceases. If the iron core of the star is too massive, the star will no longer be able to support itself and will undergo gravitational collapse. While most of the energy released during gravitational collapse is emitted very quickly, an outside observer does not actually see the end of this process. Even though the collapse takes a finite amount of time from the reference frame of infalling matter, a distant observer would see the infalling material slow and halt just above the event horizon, due to gravitational time dilation. Light from the collapsing material takes longer and longer to reach the observer, with the delay growing to infinity as the emitting material reaches the event horizon. Thus the external observer never sees the formation of the event horizon; instead, the collapsing material seems to become dimmer and increasingly red-shifted, eventually fading away. Observations of quasars at redshift z ∼ 7 {\displaystyle z\sim 7} , less than a billion years after the Big Bang, has led to investigations of other ways to form black holes. The accretion process to build supermassive black holes has a limiting rate of mass accumulation and a billion years is not enough time to reach quasar status. One suggestion is direct collapse of nearly pure hydrogen gas (low metalicity) clouds characteristic of the young universe, forming a supermassive star which collapses into a black hole. It has been suggested that seed black holes with typical masses of ~105 M☉ could have formed in this way which then could grow to ~109 M☉. However, the very large amount of gas required for direct collapse is not typically stable to fragmentation to form multiple stars. Thus another approach suggests massive star formation followed by collisions that seed massive black holes which ultimately merge to create a quasar.: 85 A neutron star in a common envelope with a regular star can accrete sufficient material to collapse to a black hole or two neutron stars can merge. These avenues for the formation of black holes are considered relatively rare. In the current epoch of the universe, conditions needed to form black holes are rare and are mostly only found in stars. However, in the early universe, conditions may have allowed for black hole formations via other means. Fluctuations of spacetime soon after the Big Bang may have formed areas that were denser then their surroundings. Initially, these regions would not have been compact enough to form a black hole, but eventually, the curvature of spacetime in the regions become large enough to cause them to collapse into a black hole. Different models for the early universe vary widely in their predictions of the scale of these fluctuations. Various models predict the creation of primordial black holes ranging from a Planck mass (~2.2×10−8 kg) to hundreds of thousands of solar masses. Primordial black holes with masses less than 1015 g would have evaporated by now due to Hawking radiation. Despite the early universe being extremely dense, it did not re-collapse into a black hole during the Big Bang, since the universe was expanding rapidly and did not have the gravitational differential necessary for black hole formation. Models for the gravitational collapse of objects of relatively constant size, such as stars, do not necessarily apply in the same way to rapidly expanding space such as the Big Bang. In principle, black holes could be formed in high-energy particle collisions that achieve sufficient density, although no such events have been detected. These hypothetical micro black holes, which could form from the collision of cosmic rays and Earth's atmosphere or in particle accelerators like the Large Hadron Collider, would not be able to aggregate additional mass. Instead, they would evaporate in about 10−25 seconds, posing no threat to the Earth. Evolution Black holes can also merge with other objects such as stars or even other black holes. This is thought to have been important, especially in the early growth of supermassive black holes, which could have formed from the aggregation of many smaller objects. The process has also been proposed as the origin of some intermediate-mass black holes. Mergers of supermassive black holes may take a long time: As a binary of supermassive black holes approach each other, most nearby stars are ejected, leaving little for the remaining black holes to gravitationally interact with that would allow them to get closer to each other. This phenomenon has been called the final parsec problem, as the distance at which this happens is usually around one parsec. When a black hole accretes matter, the gas in the inner accretion disk orbits at very high speeds because of its proximity to the black hole. The resulting friction heats the inner disk to temperatures at which it emits vast amounts of electromagnetic radiation (mainly X-rays) detectable by telescopes. By the time the matter of the disk reaches the ISCO, between 5.7% and 42% of its mass will have been converted to energy, depending on the black hole's spin. About 90% of this energy is released within about 20 black hole radii. In many cases, accretion disks are accompanied by relativistic jets that are emitted along the black hole's poles, which carry away much of the energy. The mechanism for the creation of these jets is currently not well understood, in part due to insufficient data. Many of the universe's most energetic phenomena have been attributed to the accretion of matter on black holes. Active galactic nuclei and quasars are believed to be the accretion disks of supermassive black holes. X-ray binaries are generally accepted to be binary systems in which one of the two objects is a compact object accreting matter from its companion. Ultraluminous X-ray sources may be the accretion disks of intermediate-mass black holes. At a certain rate of accretion, the outward radiation pressure will become as strong as the inward gravitational force, and the black hole should unable to accrete any faster. This limit is called the Eddington limit. However, many black holes accrete beyond this rate due to their non-spherical geometry or instabilities in the accretion disk. Accretion beyond the limit is called Super-Eddington accretion and may have been commonplace in the early universe. Stars have been observed to get torn apart by tidal forces in the immediate vicinity of supermassive black holes in galaxy nuclei, in what is known as a tidal disruption event (TDE). Some of the material from the disrupted star forms an accretion disk around the black hole, which emits observable electromagnetic radiation. The correlation between the masses of supermassive black holes in the centres of galaxies with the velocity dispersion and mass of stars in their host bulges suggests that the formation of galaxies and the formation of their central black holes are related. Black hole winds from rapid accretion, particularly when the galaxy itself is still accreting matter, can compress gas nearby, accelerating star formation. However, if the winds become too strong, the black hole may blow nearly all of the gas out of the galaxy, quenching star formation. Black hole jets may also energize nearby cavities of plasma and eject low-entropy gas from out of the galactic core, causing gas in galactic centers to be hotter than expected. If Hawking's theory of black hole radiation is correct, then black holes are expected to shrink and evaporate over time as they lose mass by the emission of photons and other particles. The temperature of this thermal spectrum (Hawking temperature) is proportional to the surface gravity of the black hole, which is inversely proportional to the mass. Hence, large black holes emit less radiation than small black holes.: Ch. 9.6 A stellar black hole of 1 M☉ has a Hawking temperature of 62 nanokelvins. This is far less than the 2.7 K temperature of the cosmic microwave background radiation. Stellar-mass or larger black holes receive more mass from the cosmic microwave background than they emit through Hawking radiation and thus will grow instead of shrinking. To have a Hawking temperature larger than 2.7 K (and be able to evaporate), a black hole would need a mass less than the Moon. Such a black hole would have a diameter of less than a tenth of a millimetre. The Hawking radiation for an astrophysical black hole is predicted to be very weak and would thus be exceedingly difficult to detect from Earth. A possible exception is the burst of gamma rays emitted in the last stage of the evaporation of primordial black holes. Searches for such flashes have proven unsuccessful and provide stringent limits on the possibility of existence of low mass primordial black holes, with modern research predicting that primordial black holes must make up less than a fraction of 10−7 of the universe's total mass. NASA's Fermi Gamma-ray Space Telescope, launched in 2008, has searched for these flashes, but has not yet found any. The properties of a black hole are constrained and interrelated by the theories that predict these properties. When based on general relativity, these relationships are called the laws of black hole mechanics. For a black hole that is not still forming or accreting matter, the zeroth law of black hole mechanics states the black hole's surface gravity is constant across the event horizon. The first law relates changes in the black hole's surface area, angular momentum, and charge to changes in its energy. The second law says the surface area of a black hole never decreases on its own. Finally, the third law says that the surface gravity of a black hole is never zero. These laws are mathematical analogs of the laws of thermodynamics. They are not equivalent, however, because, according to general relativity without quantum mechanics, a black hole can never emit radiation, and thus its temperature must always be zero.: 11 Quantum mechanics predicts that a black hole will continuously emit thermal Hawking radiation, and therefore must always have a nonzero temperature. It also predicts that all black holes have entropy which scales with their surface area. When quantum mechanics is accounted for, the laws of black hole mechanics become equivalent to the classical laws of thermodynamics. However, these conclusions are derived without a complete theory of quantum gravity, although many potential theories do predict black holes having entropy and temperature. Thus, the true quantum nature of black hole thermodynamics continues to be debated.: 29 Observational evidence Millions of black holes with around 30 solar masses derived from stellar collapse are expected to exist in the Milky Way. Even a dwarf galaxy like Draco should have hundreds. Only a few of these have been detected. By nature, black holes do not themselves emit any electromagnetic radiation other than the hypothetical Hawking radiation, so astrophysicists searching for black holes must generally rely on indirect observations. The defining characteristic of a black hole is its event horizon. The horizon itself cannot be imaged, so all other possible explanations for these indirect observations must be considered and eliminated before concluding that a black hole has been observed.: 11 The Event Horizon Telescope (EHT) is a global system of radio telescopes capable of directly observing a black hole shadow. The angular resolution of a telescope is based on its aperture and the wavelengths it is observing. Because the angular diameters of Sagittarius A* and Messier 87* in the sky are very small, a single telescope would need to be about the size of the Earth to clearly distinguish their horizons using radio wavelengths. By combining data from several different radio telescopes around the world, the Event Horizon Telescope creates an effective aperture the diameter size of the Earth. The EHT team used imaging algorithms to compute the most probable image from the data in its observations of Sagittarius A* and M87*. Gravitational-wave interferometry can be used to detect merging black holes and other compact objects. In this method, a laser beam is split down two long arms of a tunnel. The laser beams reflect off of mirrors in the tunnels and converge at the intersection of the arms, cancelling each other out. However, when a gravitational wave passes, it warps spacetime, changing the lengths of the arms themselves. Since each laser beam is now travelling a slightly different distance, they do not cancel out and produce a recognizable signal. Analysis of the signal can give scientists information about what caused the gravitational waves. Since gravitational waves are very weak, gravitational-wave observatories such as LIGO must have arms several kilometers long and carefully control for noise from Earth to be able to detect these gravitational waves. Since the first measurements in 2016, multiple gravitational waves from black holes have been detected and analyzed. The proper motions of stars near the centre of the Milky Way provide strong observational evidence that these stars are orbiting a supermassive black hole. Since 1995, astronomers have tracked the motions of 90 stars orbiting an invisible object coincident with the radio source Sagittarius A*. In 1998, by fitting the motions of the stars to Keplerian orbits, the astronomers were able to infer that Sagittarius A* must be a 2.6×106 M☉ object must be contained within a radius of 0.02 light-years. Since then, one of the stars—called S2—has completed a full orbit. From the orbital data, astronomers were able to refine the calculations of the mass of Sagittarius A* to 4.3×106 M☉, with a radius of less than 0.002 light-years. This upper limit radius is larger than the Schwarzschild radius for the estimated mass, so the combination does not prove Sagittarius A* is a black hole. Nevertheless, these observations strongly suggest that the central object is a supermassive black hole as there are no other plausible scenarios for confining so much invisible mass into such a small volume. Additionally, there is some observational evidence that this object might possess an event horizon, a feature unique to black holes. The Event Horizon Telescope image of Sagittarius A*, released in 2022, provided further confirmation that it is indeed a black hole. X-ray binaries are binary systems that emit a majority of their radiation in the X-ray part of the electromagnetic spectrum. These X-ray emissions result when a compact object accretes matter from an ordinary star. The presence of an ordinary star in such a system provides an opportunity for studying the central object and to determine if it might be a black hole. By measuring the orbital period of the binary, the distance to the binary from Earth, and the mass of the companion star, scientists can estimate the mass of the compact object. The Tolman-Oppenheimer-Volkoff limit (TOV limit) dictates the largest mass a nonrotating neutron star can be, and is estimated to be about two solar masses. While a rotating neutron star can be slightly more massive, if the compact object is much more massive than the TOV limit, it cannot be a neutron star and is generally expected to be a black hole. The first strong candidate for a black hole, Cygnus X-1, was discovered in this way by Charles Thomas Bolton, Louise Webster, and Paul Murdin in 1972. Observations of rotation broadening of the optical star reported in 1986 lead to a compact object mass estimate of 16 solar masses, with 7 solar masses as the lower bound. In 2011, this estimate was updated to 14.1±1.0 M☉ for the black hole and 19.2±1.9 M☉ for the optical stellar companion. X-ray binaries can be categorized as either low-mass or high-mass; This classification is based on the mass of the companion star, not the compact object itself. In a class of X-ray binaries called soft X-ray transients, the companion star is of relatively low mass, allowing for more accurate estimates of the black hole mass. These systems actively emit X-rays for only several months once every 10–50 years. During the period of low X-ray emission, called quiescence, the accretion disk is extremely faint, allowing detailed observation of the companion star. Numerous black hole candidates have been measured by this method. Black holes are also sometimes found in binaries with other compact objects, such as white dwarfs, neutron stars, and other black holes. The centre of nearly every galaxy contains a supermassive black hole. The close observational correlation between the mass of this hole and the velocity dispersion of the host galaxy's bulge, known as the M–sigma relation, strongly suggests a connection between the formation of the black hole and that of the galaxy itself. Astronomers use the term active galaxy to describe galaxies with unusual characteristics, such as unusual spectral line emission and very strong radio emission. Theoretical and observational studies have shown that the high levels of activity in the centers of these galaxies, regions called active galactic nuclei (AGN), may be explained by accretion onto supermassive black holes. These AGN consist of a central black hole that may be millions or billions of times more massive than the Sun, a disk of interstellar gas and dust called an accretion disk, and two jets perpendicular to the accretion disk. Although supermassive black holes are expected to be found in most AGN, only some galaxies' nuclei have been more carefully studied in attempts to both identify and measure the actual masses of the central supermassive black hole candidates. Some of the most notable galaxies with supermassive black hole candidates include the Andromeda Galaxy, Messier 32, Messier 87, the Sombrero Galaxy, and the Milky Way itself. Another way black holes can be detected is through observation of effects caused by their strong gravitational field. One such effect is gravitational lensing: The deformation of spacetime around a massive object causes light rays to be deflected, making objects behind them appear distorted. When the lensing object is a black hole, this effect can be strong enough to create multiple images of a star or other luminous source. However, the distance between the lensed images may be too small for contemporary telescopes to resolve—this phenomenon is called microlensing. Instead of seeing two images of a lensed star, astronomers see the star brighten slightly as the black hole moves towards the line of sight between the star and Earth and then return to its normal luminosity as the black hole moves away. The turn of the millennium saw the first 3 candidate detections of black holes in this way, and in January 2022, astronomers reported the first confirmed detection of a microlensing event from an isolated black hole. This was also the first determination of an isolated black hole mass, 7.1±1.3 M☉. Alternatives While there is a strong case for supermassive black holes, the model for stellar-mass black holes assumes of an upper limit for the mass of a neutron star: objects observed to have more mass are assumed to be black holes. However, the properties of extremely dense matter are poorly understood. New exotic phases of matter could allow other kinds of massive objects. Quark stars would be made up of quark matter and supported by quark degeneracy pressure, a form of degeneracy pressure even stronger than neutron degeneracy pressure. This would halt gravitational collapse at a higher mass than for a neutron star. Even stronger stars called electroweak stars would convert quarks in their cores into leptons, providing additional pressure to stop the star from collapsing. If, as some extensions of the Standard Model posit, quarks and leptons are made up of the even-smaller fundamental particles called preons, a very compact star could be supported by preon degeneracy pressure. While none of these hypothetical models can explain all of the observations of stellar black hole candidates, a Q star is the only alternative which could significantly exceed the mass limit for neutron stars and thus provide an alternative for supermassive black holes.: 12 A few theoretical objects have been conjectured to match observations of astronomical black hole candidates identically or near-identically, but which function via a different mechanism. A dark energy star would convert infalling matter into vacuum energy; This vacuum energy would be much larger than the vacuum energy of outside space, exerting outwards pressure and preventing a singularity from forming. A black star would be gravitationally collapsing slowly enough that quantum effects would keep it just on the cusp of fully collapsing into a black hole. A gravastar would consist of a very thin shell and a dark-energy interior providing outward pressure to stop the collapse into a black hole or formation of a singularity; It could even have another gravastar inside, called a 'nestar'. Open questions According to the no-hair theorem, a black hole is defined by only three parameters: its mass, charge, and angular momentum. This seems to mean that all other information about the matter that went into forming the black hole is lost, as there is no way to determine anything about the black hole from outside other than those three parameters. When black holes were thought to persist forever, this information loss was not problematic, as the information can be thought of as existing inside the black hole. However, black holes slowly evaporate by emitting Hawking radiation. This radiation does not appear to carry any additional information about the matter that formed the black hole, meaning that this information is seemingly gone forever. This is called the black hole information paradox. Theoretical studies analyzing the paradox have led to both further paradoxes and new ideas about the intersection of quantum mechanics and general relativity. While there is no consensus on the resolution of the paradox, work on the problem is expected to be important for a theory of quantum gravity.: 126 Observations of faraway galaxies have found that ultraluminous quasars, powered by supermassive black holes, existed in the early universe as far as redshift z ≥ 7 {\displaystyle z\geq 7} . These black holes have been assumed to be the products of the gravitational collapse of large population III stars. However, these stellar remnants were not massive enough to produce the quasars observed at early times without accreting beyond the Eddington limit, the theoretical maximum rate of black hole accretion. Physicists have suggested a variety of different mechanisms by which these supermassive black holes may have formed. It has been proposed that smaller black holes may have also undergone mergers to produce the observed supermassive black holes. It is also possible that they were seeded by direct-collapse black holes, in which a large cloud of hot gas avoids fragmentation that would lead to multiple stars, due to low angular momentum or heating from a nearby galaxy. Given the right circumstances, a single supermassive star forms and collapses directly into a black hole without undergoing typical stellar evolution. Additionally, these supermassive black holes in the early universe may be high-mass primordial black holes, which could have accreted further matter in the centers of galaxies. Finally, certain mechanisms allow black holes to grow faster than the theoretical Eddington limit, such as dense gas in the accretion disk limiting outward radiation pressure that prevents the black hole from accreting. However, the formation of bipolar jets prevent super-Eddington rates. In fiction Black holes have been portrayed in science fiction in a variety of ways. Even before the advent of the term itself, objects with characteristics of black holes appeared in stories such as the 1928 novel The Skylark of Space with its "black Sun" and the "hole in space" in the 1935 short story Starship Invincible. As black holes grew to public recognition in the 1960s and 1970s, they began to be featured in films as well as novels, such as Disney's The Black Hole. Black holes have also been used in works of the 21st century, such as Christopher Nolan's science fiction epic Interstellar. Authors and screenwriters have exploited the relativistic effects of black holes, particularly gravitational time dilation. For example, Interstellar features a black hole planet with a time dilation factor of over 60,000:1, while the 1977 novel Gateway depicts a spaceship approaching but never crossing the event horizon of a black hole from the perspective of an outside observer due to time dilation effects. Black holes have also been appropriated as wormholes or other methods of faster-than-light travel, such as in the 1974 novel The Forever War, where a network of black holes is used for interstellar travel. Additionally, black holes can feature as hazards to spacefarers and planets: A black hole threatens a deep-space outpost in 1978 short story The Black Hole Passes, and a binary black hole dangerously alters the orbit of a planet in the 2018 Netflix reboot of Lost in Space. Notes References Further reading External links |
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Contents Jarash, Jerusalem Jarash (Arabic: جرش) was a Palestinian village that was depopulated over the course of 1948 Arab-Israeli war. Located 25 kilometers west of Jerusalem, Jarash was a wholly Arab village of 220 inhabitants in 1948. The village was built of stone houses on the spur of a hill, 411 metres (1,348 ft) above sea-level, and lay about 1 km. eastward of the traffic circle opposite Moshav Zanoah, on regional road 3855 that bypasses Beit Shemesh to its east, and which road runs in a northerly-southerly direction along Wadi en Najil (now called Naḥal Zanoah). The immediate region to the west of the site of Jarash, upon two hills separated by a valley, grew orchards belonging to the village inhabitants consisting of carobs, figs, almonds and olives. Cave dwellings dot the landscape of this region. History The area immediately to the west of Jarash, as one descends into the valley below, is marked by several very old agricultural terraces, built of large stones. Their use was to retain the top soil and to prevent the soil run-off from heavy rains. The nearby grounds are strewn with potsherds; evidence of an early settlement. To the east of the village lay Khirbat Sira, which is identified as a Mamluk/Ottoman village. In 1838, Jerash was noted as a Muslim village, located in district of el-Arkub, southwest of Jerusalem. In 1863 Victor Guérin found Jarash to have 25 inhabitants, living at that time in "miserable huts." An Ottoman village list from about 1870 found that the village had a population of 53, in a total of 13 houses, though the population count included men, only. In 1883, the PEF's Survey of Western Palestine described Jarash as a village built on the spur of a hill with olive trees growing below it. In 1896 the population of Dscherasch was estimated to be about 105 persons. In the 1922 census of Palestine, conducted by the British Mandate authorities, Jarash had a population 115, all Muslims, increasing in the 1931 census to 164, still all Muslim, in a total of 33 houses. In the 1945 statistics the population was 190, all Muslims, while the total land area was 3,518 dunams, according to an official land and population survey. Of this, 5 were allocated for plantations and irrigable land, 1,335 for cereals, while 5 dunams were classified as built-up areas. Following the war, the area was incorporated into the State of Israel. The town's land was left undeveloped, though Zanoah was founded in 1950, about 2 km west of the village site. Walid Khalidi writes of Jarash in 1992: "The site is overgrown with grass, interspersed with the debris of destroyed houses and stones from the terraces. The ruins of a cemetery lie northwest of the site. Groves of trees cover two hills to the west of the site that are separated by a valley. Carob, fig, almond, and olive trees grow on these hills." Boaz Zissu of the Israel Antiquities Authority conducted an archaeological survey of Jarash in the year 2000. The old ruins of Jarash lay at the center of a spur, at some 200 meters west of the now ruined Arab village, spread over an area of only about 5 dunams (1.2 acres) and built upon two levels. According to Zissu, the site may have served as a farmstead for share-croppers who worked the adjacent fields. Most of the pottery samples collected in situ date back to the early Roman period, and a few from the Iron Age III era, as well as from the Mameluk era. Structures made of hewn stone were still visible from the Roman era. Two plastered cisterns in an enclosed area are also noticeable on the site. In one corner of the ruin are seen three monolithic, rectangular-shaped pillars ca. 1.7 metres (5.6 ft) high, aligned in a row, still standing upon their original foundation. In the lower level, structures made of field stones are still to be seen there, spread over an area 20 x 30 meters. On the rocky precipice to the east of the site are caves partially filled-in by erosion, with exposed square-like entrances, and wine-presses carved into the rock. Zissu has noted the presence of two ritual ablutions or baths (miqva'ot) in the site, evidence that the site was formerly inhabited by Jews, and raises the suggestion that it may have once been the Gerasa mentioned by Josephus in The Jewish War (4.9.1), although with some reservations, citing a more probable locale in the nearby ruin of Kh. Jurish. Gallery See also References Bibliography External links |
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Contents Thirty-seventh government of Israel The thirty-seventh government of Israel is the current cabinet of Israel, formed on 29 December 2022, following the Knesset election the previous month. The coalition government currently consists of five parties — Likud, Shas, Otzma Yehudit, Religious Zionist Party and New Hope — and is led by Benjamin Netanyahu, who took office as the prime minister of Israel for the sixth time. The government is widely regarded as the most right-wing government in the country's history, and includes far-right politicians. Several of the government's policy proposals have led to controversies, both within Israel and abroad, with the government's attempts at reforming the judiciary leading to a wave of demonstrations across the country. Following the outbreak of the Gaza war, opposition leader Yair Lapid initiated discussions with Netanyahu on the formation of an emergency government. On 11 October 2023, National Unity MKs Benny Gantz, Gadi Eisenkot, Gideon Sa'ar, Hili Tropper, and Yifat Shasha-Biton joined the Security Cabinet of Israel to form an emergency national unity government. Their accession to the Security Cabinet and to the government (as ministers without portfolio) was approved by the Knesset the following day. Gantz, Netanyahu, and Defense Minister Yoav Gallant became part of the newly formed Israeli war cabinet, with Eisenkot and Ron Dermer serving as observers. National Unity left the government in June 2024. New Hope rejoined the government in September. Otzma Yehudit announced on 19 January 2025 that it had withdrawn from the government, which took effect on 21 January, following the cabinet's acceptance of the three-phase Gaza war ceasefire proposal, though it rejoined two months later. United Torah Judaism left the government in July 2025 over dissatisfaction with the government's draft conscription law. Shas left the government several days later, though it remains part of the coalition. Background The right-wing bloc of parties, led by Benjamin Netanyahu, known in Israel as the national camp, won 64 of the 120 seats in the elections for the Knesset, while the coalition led by the incumbent prime minister Yair Lapid won 51 seats. The new majority has been variously described as the most right-wing government in Israeli history, as well as Israel's most religious government. Shortly after the elections, Lapid conceded to Netanyahu, and congratulated him, wishing him luck "for the sake of the Israeli people". On 15 November, the swearing-in ceremony for the newly elected members of the 25th Knesset was held during the opening session. The vote to appoint a new Speaker of the Knesset, which is usually conducted at the opening session, as well as the swearing in of cabinet members were postponed since ongoing coalition negotiations had not yet resulted in agreement on these positions. Government formation Yair Lapid Yesh Atid Benjamin Netanyahu Likud On 3 November 2022, Netanyahu told his aide Yariv Levin to begin informal coalition talks with allied parties, after 97% of the vote was counted. The leader of the Shas party Aryeh Deri met with Yitzhak Goldknopf, the leader of United Torah Judaism and its Agudat Yisrael faction, on 4 November. The two parties agreed to cooperate as members of the next government. The Degel HaTorah faction of United Torah Judaism stated on 5 November that it will maintain its ideological stance about not seeking any ministerial posts, as per the instruction of its spiritual leader Rabbi Gershon Edelstein, but will seek other senior posts like Knesset committee chairmen and deputy ministers. Netanyahu himself started holding talks on 6 November. He first met with Moshe Gafni, the leader of Degel HaTorah, and then with Goldknopf. Meanwhile, the Religious Zionist Party leader Bezalel Smotrich and the leader of its Otzma Yehudit faction Itamar Ben-Gvir pledged that they would not enter the coalition without the other faction. Gafni later met with Smotrich for coalition talks. Smotrich then met with Netanyahu. On 7 November, Netanyahu met with Ben-Gvir who demanded the Ministry of Public Security with expanded powers for himself and the Ministry of Education or Transport and Road Safety for Yitzhak Wasserlauf. A major demand among all of Netanyahu's allies was that the Knesset be allowed to ignore the rulings of the Supreme Court. Netanyahu met with the Noam faction leader and its sole MK Avi Maoz on 8 November after he threatened to boycott the coalition. He demanded complete control of the Western Wall by the Haredi rabbinate and removal of what he considered as anti-Zionist and anti-Jewish content in schoolbooks. President Isaac Herzog began consultations with heads of all the political parties on 9 November after the election results were certified. During the consultations, he expressed his reservations about Ben-Gvir becoming a member in the next government. Shas met with Likud for coalition talks on 10 November. By 11 November, Netanyahu had secured recommendations from 64 MKs, which constituted a majority. He was given the mandate to form the thirty-seventh government of Israel by President Herzog on 13 November. Otzma Yehudit and Noam officially split from Religious Zionism on 20 November as per a pre-election agreement. On 25 November, Otzma Yehudit and Likud signed a coalition agreement, under which Ben-Gvir will assume the newly created position of National Security Minister, whose powers would be more expansive than that of the Minister of Public Security, including overseeing the Israel Police and the Israel Border Police in the West Bank, as well as giving powers to authorities to shoot thieves stealing from military bases. Yitzhak Wasserlauf was given the Ministry for the Development of the Negev and the Galilee with expanded powers to regulate new West Bank settlements, while separating it from the "Periphery" portfolio, which will be given to Shas. The deal also includes giving the Ministry of Heritage to Amihai Eliyahu, separating it from the "Jerusalem Affairs" portfolio, the chairmanship of the Knesset's Public Security Committee to Zvika Fogel and that of the Special Committee for the Israeli Citizens' Fund to Limor Son Har-Melech, the post of Deputy Economic Minister to Almog Cohen, establishment of a national guard, and expansion of mobilization of reservists in the Border Police. Netanyahu and Maoz signed a coalition agreement on 27 November, under which the latter would become a deputy minister, would head an agency on Jewish identity in the Prime Minister's Office, and would also head Nativ, which processes the aliyah from the former Soviet Union. The agency for Jewish identity would have authority over educational content taught outside the regular curriculum in schools, in addition to the department of the Ministry of Education overseeing external teaching and partnerships, which would bring nonofficial organisations permitted to teach and lecture at schools under its purview. Likud signed a coalition agreement with the Religious Zionist Party on 1 December. Under the deal, Smotrich would serve as the Minister of Finance in rotation with Aryeh Deri, and the party will receive the post of a minister within the Ministry of Defense with control over the departments administering settlement and open lands under the Coordinator of Government Activities in the Territories, in addition to another post of a deputy minister. The deal also includes giving the post of Minister of Aliyah and Integration to Ofir Sofer, the newly created National Missions Ministry to Orit Strook, and the chairmanship of the Knesset's Constitution, Law and Justice Committee to Simcha Rothman. Likud and United Torah Judaism signed a coalition agreement on 6 December, to allow request for an extension to the deadline. Under it, the party would receive the Ministry of Construction and Housing, the chairmanship of the Knesset Finance Committee which will be given to Moshe Gafni, the Ministry of Jerusalem and Tradition (which would replace the Ministry of Jerusalem Affairs and Heritage), in addition to several posts of deputy ministers and chairmanships of Knesset committees. Likud also signed a deal with Shas by 8 December, securing interim coalition agreements with all of their allies. Under the deal, Deri will first serve as the Minister of Interior and Health, before rotating posts with Smotrich after two years. The party will also receive the Ministry of Religious Services and Welfare Ministries, as well as posts of deputy ministers in the Ministry of Education and Interior. The vote to replace then-incumbent Knesset speaker Mickey Levy was scheduled for 13 December, after Likud and its allies secured the necessary number of signatures for it. Yariv Levin of Likud was elected as an interim speaker by 64 votes, while his opponents Merav Ben-Ari of Yesh Atid and Ayman Odeh of Hadash received 45 and five votes respectively. Netanyahu asked Herzog for a 14-day extension after the agreement with Shas to finalise the roles his allied parties would play. Herzog on 9 December extended the deadline to 21 December. On that date, Netanyahu informed Herzog that he had succeeded in forming a coalition, with the new government expected to be sworn in by 2 January 2023. The government was sworn in on 29 December 2022. Timeline Israeli law stated that people convicted of crimes cannot serve in the government. An amendment to that law was made in late 2022, known colloquially as the Deri Law, to allow those who had been convicted without prison time to serve. This allowed Deri to be appointed to the cabinet. Shas leader Aryeh Deri was appointed to be Minister of Health, Minister of the Interior, and Vice Prime Minister in December 2022. He was fired in January 2023, following a Supreme Court decision that his appointment was unreasonable, since he had been convicted of fraud, and had promised not to seek government roles through a plea deal. In March 2023, Defence Minister Yoav Gallant called on the government to delay legislation related to the judicial reform. Prime Minister Netanyahu announced that he had been dismissed from his position, leading to the continuation of mass protests across the country (which had started in January in Tel Aviv). Gallant continued to serve as a minister as he had not received formal notice of dismissal, and two weeks later it was announced that Netanyahu had reversed his decision. Public Safety Minister Itamar Ben-Gvir (Otzma Yehudit leader) and Minister of Justice Yariv Levin (Likud) both threatened to resign if the judicial reform was delayed.[better source needed] After the outbreak of the Gaza war, five members of the National Unity party joined the government as ministers without portfolio, with leader Benny Gantz being made a member of the new Israeli war cabinet (along with Netanyahu and Gallant). As the war progressed, minister of national security Itamar Ben-Gvir threatened to leave the government if the war was ended. A month later in mid December, he again threatened to leave if the war did not maintain "full strength". Gideon Sa'ar stated on 16 March that his New Hope party would resign from the government and join the opposition if Prime Minister Benjamin Netanyahu did not appoint him to the Israeli war cabinet. Netanyahu did not do so, resulting in Sa'ar's New Hope party leaving the government nine days later, reducing the size of the coalition from 76 MKs to 72. Ben-Gvir and Bezalel Smotrich, of the National Religious Party–Religious Zionism party, have indicated that they will withdraw their parties from the government if the January 2025 Gaza war ceasefire is adopted, which would bring down the government. Ben-Gvir announced on 5 June that the members of his party would be allowed to vote as they wish, though his party resumed support on 9 June. On 18 May, Gantz set an 8 June deadline for withdrawal from the coalition, which was delayed by a day following the 2024 Nuseirat rescue operation. Gantz and his party left the government on 9 June, giving the government 64 seats in the Knesset. Sa'ar and his New Hope party rejoined the Netanyahu government on 30 September, increasing the number of seats held by the government to 68. The High Court of Justice ruled on 28 March 2024 that yeshiva funds would no longer be available for students who are "eligible for enlistment", effectively allowing ultra-Orthodox Jews to be drafted into the IDF. Attorney general Gali Baharav-Miara indicated on 31 March that the conscription process must begin on 1 April. The court ruled on 25 June that the IDF must begin to draft yeshiva students. Likud announced on 7 July that it would not put forward any legislation after Shas and United Torah Judaism said that they would boycott the plenary session over the lack of legislation dealing with the Haredi draft. The Ultra-Orthodox boycott continued for a second day, with UTJ briefly ending its boycott on 9 July to unsuccessfully vote in favor of a bill which would have weakened the Law of Return. Yuli Edelstein, who was replaced by Boaz Bismuth on the Foreign Affairs and Defense Committee in early August, published a draft version of the conscription law shortly before his ouster. Bismuth cancelled the work on the draft law in September 2025, which Edelstein called "a shame." Bismuth released the official version of the draft law in late November 2025. It weakened penalties for draft evaders, with Edelstein saying it was "the exact opposite" of the bill which he attempted to pass. Members of Otzma Yehudit resigned from the government on 19 January 2025 over the January 2025 Gaza war ceasefire, which took effect on 21 January. The members rejoined in March, following the "resumption" of the war in Gaza. Avi Maoz of the Noam party left the government in March 2025. On 4 June 2025, senior rabbis for United Torah Judaism Dov Lando and Moshe Hillel Hirsch instructed the party's MKs to pass a bill which would dissolve the Knesset. Yesh Atid, Yisrael Beytenu and The Democrats announced that they will "submit a bill" for dissolution on 11 June, with Yesh Atid tabling the bill on 4 June. There were also reports that Shas would vote in favor of Knesset dissolution amidst division within the governing coalition on Haredi conscription. This jeopardized the coalition's majority and would have triggered new elections if the bill passed. The following day, Agudat Yisrael, one of the United Torah Judaism factions, confirmed that it would submit a bill to dissolve the Knesset. Asher Medina, a Shas spokesman, indicated on 9 June that the party would vote in favor of a preliminary bill to dissolve the Knesset. The rabbis of Degel HaTorah instructed the parties' MKs on 12 June 2025 to oppose the dissolution of the Knesset, which was followed by Yuli Edelstein and the Shas and Degel HaTorah parties announcing that a deal had been reached, with "rabbinical leaders" telling their parties to delay the dissolution vote by a week. Shas and Degel HaTorah voted against the dissolution bill, which led to the bill failing its preliminary reading in a vote of 61 against and 53 in favor. MKs Ya'akov Tessler and Moshe Roth of Agudat Yisrael voted in favor of dissolution. Another dissolution bill will be unable to be brought forward for six months. If the bill had passed its preliminary reading, in addition to three more readings, an election would have been held in approximately three months; The Jerusalem Post posited it would have been held in October. Degel HaTorah announced on 14 July 2025 that it would leave the government because members of the party were dissatisfied after viewing the proposed draft bill by Yuli Edelstein regarding Haredi exemptions from the Israeli draft. Several hours later, Agudat Yisrael announced that it would also leave the government. Deputy Transportation Minister Uri Maklev, Moshe Gafni, the head of the Knesset Finance Committee, Ya'akov Asher, the head of the Knesset Interior and Environment Protection Committee and Jerusalem Affairs minister Meir Porush all submitted their resignations, with their resignations taking effect in 48 hours. Sports Minister Ya'akov Tessler and "Special Committee for Public Petitions Chair" Yitzhak Pindrus also submitted resignations. Yisrael Eichler submitted his resignation as the "head of the Knesset Labor and Welfare Committee" the same day. The resignations will leave Netanyahu's government with a 60-seat majority in the Knesset, as Avi Maoz, of the Noam party, left the government in March 2025. Despite Edelstein's ouster in August, a spokesman for UTJ head Yitzhak Goldknopf remarked that it would not change the faction's withdrawal from the government. The religious council for Shas, called the Moetzet Chachmei HaTorah, instructed the party on 16 July to leave the government, but stay in the coalition. The following day, various cabinet ministers submitted their resignations, including "Interior Minister Moshe Arbel, Social Affairs Minister Ya'akov Margi and Religious Services Minister Michael Malchieli." Malchieli reportedly has postponed his resignation so he could attend a 20 July meeting of the panel investigating whether attorney general Gali Baharav-Miara should be dismissed. Deputy Minister of Agriculture Moshe Abutbul, Minister of Health Uriel Buso and Haim Biton, a minister in the Education Ministry, also submitted their resignation letters, while Arbel retracted his resignation letter. The last cabinet member from the party to submit it was Labor Minister Yoav Ben-Tzur. The ministers who resigned will return to the Knesset, replacing MKs Moshe Roth, Yitzhak Pindrus and Eliyahu Baruchi. Members of government Listed below are the current ministers in the government: Principles and priorities According to the agreements signed between Likud and each of its coalition partners, and the incoming government's published guideline principles, its stated priorities are to combat the cost of living, further centralize Orthodox control over the state religious services, pass judicial reforms which include legislation to reduce judicial controls on executive and legislative power, expand settlements in the West Bank, and consider an annexation of the West Bank. Before the vote of confidence in his new government in the Knesset, Netanyahu presented three top priorities for the new government: internal security and governance, halting the nuclear program of Iran, and the development of infrastructure, with a focus on further connecting the center of the country with its periphery. Policies The government's flagship program, centered around reforms in the judicial branch, drew widespread criticism. Critics said it would have negative effects on the separation of powers, the office of the Attorney General, the economy, public health, women and minorities, workers' rights, scientific research, the overall strength of Israel's democracy and its foreign relations. After weeks of public protests on Israel's streets, joined by a growing number of military reservists, Minister of Defense Yoav Gallant spoke against the reform on 25 March, calling for a halt of the legislative process "for the sake of Israel's security". The next day, Netanyahu announced that he would be removed from his post, sparking another wave of protest across Israel and ultimately leading to Netanyahu agreeing to pause the legislation. On 10 April, Netanyahu announced that Gallant would keep his post. On 27 March 2023, after the public protests and general strikes, Netanyahu announced a pause in the reform process to allow for dialogue with opposition parties. However, negotiations aimed at reaching a compromise collapsed in June, and the government resumed its plans to unilaterally pass parts of the legislation. On 24 July 2023, the Knesset passed a bill that curbs the power of the Supreme Court to declare government decisions unreasonable; on 1 January 2024, the Supreme Court struck the bill down. The Knesset passed a "watered-down" version of the judicial reform package in late March 2025 which "changes the composition" of the judicial selection committee. In December 2022 Minister of National Security Itamar Ben-Gvir sought to amend the law that regulates the operations of the Israel Police, such that the ministry will have more direct control of its forces and policies, including its investigative priorities. Attorney General Gali Baharav-Miara objected to the draft proposal, raising concerns that the law would enable the politicization of police work, and the draft was amended to partially address those concerns. Nevertheless, in March 2023 Deputy Attorney General Gil Limon stated that the Attorney General's fears had been realized, referring to several instances of ministerial involvement in the day-to-day work of the otherwise independent police force – statements that were repeated by the Attorney General herself two days later. Separately, Police Commissioner Kobi Shabtai instructed Deputy Commissioners to avoid direct communication with the minister, later stating that "the Israel Police will remain apolitical, and act only according to law". Following appeals by the Association for Civil Rights in Israel and the Movement for Quality Government in Israel, the High Court of Justice instructed Ben-Gvir "to refrain from giving operational directions to the police... [especially] as regards to protests and demonstrations against the government." As talks of halting the judicial reform gained wind during March 2023, Minister of National Security Itamar Ben-Gvir threatened to resign if the legislation implementing the changes was suspended. To appease Ben-Gvir, Prime Minister Netanyahu announced that the government would promote the creation of a new National Guard, to be headed by Ben-Gvir. On 29 March, thousands of Israelis demonstrated in Tel Aviv, Haifa and Jerusalem against this decision. On 1 April, the New York Times quoted Gadeer Nicola, head of the Arab department at the Association for Civil Rights in Israel, as saying "If this thing passes, it will be an imminent danger to the rights of Arab citizens in this country. This will create two separate systems of applying the law. The regular police which will operate against Jewish citizens — and a militarized militia to deal only with Arab citizens." The same day, while speaking on Israel's Channel 13 about those whom he'd like to see enlist in the National Guard, Ben-Gvir specifically mentioned La Familia, the far-right fan club of the Beitar Jerusalem soccer team. On 2 April, Israel's cabinet approved the establishment of a law enforcement body that would operate independently of the police, under Ben-Gvir's authority. According to the decision, the Minister was to establish a committee chaired by the Director General of the Ministry of National Security, with representatives of the ministries of defense, justice and finance, as well as the police and the IDF, to outline the operations of the new organization. The committee's recommendations will be submitted to the government for consideration. Addressing a conference on 4 April, Police Commissioner Kobi Shabtai said that he is not opposed to the establishment of a security body which would answer to the police, but "a separate body? Absolutely not." The police chief said he had warned Ben-Gvir that the establishment of a security body separate from the police is "unnecessary, with extremely high costs that may harm citizens' personal security." During a press conference on 10 April, Prime Minister Netanyahu said, in what has been seen by some news outlets as a concession to the protesters, that "This will not be anyone's militia, it will be a security body, orderly, professional, that will be subordinate to one of the [existing] security bodies." The committee established by the government recommended the government to order the establishment of the National Guard immediately while allocating budgets. The National Guard, under whose command will be a superintendent of the police, will not be subordinate to Ben-Gvir. It will be subordinate to the police commissioner and will be part of Israel Border Police. The Ministry of Defense and Finance opposed the conclusions. The Israeli National Security Council called for further discussion on this. The coalition's efforts to expand the purview of Rabbinical courts; force some organizations, such as hospitals, to enforce certain religious practices; amend the Law Prohibiting Discrimination to allow gender segregation and discrimination on the grounds of religious belief; expand funding for religious causes; and put into law the exemption of yeshiva and kolel students from conscription have drawn criticism. According to the Haaretz op-ed of 7 March 2023, "the current coalition is interested... in modifying the public space so it suits the religious lifestyle. The legal coup is meant to castrate anyone who can prevent it, most of all the HCJ." Several banks and institutional investors, including the Israel Discount Bank and AIG have committed to avoid investing in, or providing credit to any organization that will discriminate against others on ground of religion, race, gender or sexual orientation. A series of technology companies and investment firms including Wiz, Intel Israel, Salesforce and Microsoft Israel Research and Development, have criticized the proposed changes to the Law Prohibiting Discrimination, with Wiz stating that it will require its suppliers to commit to preventing discrimination. Over sixty prominent law firms pledged that they will neither represent, nor do business with discriminating individuals and organizations. Insight Partners, a major private equity fund operating in Israel, released a statement warning against intolerance and any attempt to harm personal liberties. Orit Lahav, chief executive of the women's rights organization Mavoi Satum ("Dead End"), said that "the Rabbinical courts are the most discriminatory institution in the State of Israel... Limiting the HCJ[d] while expanding the jurisdiction of the Rabbinical courts would... cause significant harm to women." Anat Thon Ashkenazy, Director of the Center for Democratic Values and Institutions at the Israel Democracy Institute, said that "almost every part of the reform could harm women... the meaning of an override clause is that even if the court says that the law on gender segregation is illegitimate, is harmful, the Knesset could say 'Okay, we say otherwise'". She added that "there is a very broad institutional framework here, after which there will come legislation that harms women's right and we will have no way of protecting or stopping it." During July 2023, 20 professional medical associations signed a letter of position warning against the ramifications to public health that would result from the exclusion of women from the public sphere. They cited, among others, a rise in prevalence of risk factors for cardiovascular disease, pregnancy-related ailments, psychological distress, and the risk of suicide. On 30 July the Knesset passed an amendment to penal law adding sexual offenses to those offenses whose penalty can be doubled if done on grounds of "nationalistic terrorism, racism or hostility towards a certain community". According to MK Limor Son Har-Melech, the bill is meant to penalize any individual who "[intends to] harm a woman sexually based on her Jewishness". The law was criticized by MK Gilad Kariv as "populist, nationalistic, and dangerous towards the Arab citizens of Israel", and by MK Ahmad Tibi as a "race law", and was objected to by legal advisors at the Ministry of Justice and the Knesset Committee on National Security. Activist Orit Kamir wrote that "the amendment... is neither feminist, equal, nor progressive, but the opposite: it subordinates women's sexuality to the nationalistic, racist patriarchy. It hijacks the Law for Prevention of Sexual Harassment to serve a world view that tags women as sexual objects that personify the nation's honor." Yael Sherer, director of the Lobby to Combat Sexual Violence, criticized the law as being informed by dated ideas about sexual assault, and proposed that MKs "dedicate a session... to give victims of sexual assault an opportunity to come out of the darkness... instead of [submitting] declarative bills that change nothing and are not meant but for grabbing headlines". In Israel, during 2022, 24 women "were murdered because they were women," which was an increase of 50% compared to 2021. A law permitting courts to order men subject to a restraining order following domestic violence offenses to wear electronic tags was drafted during the previous Knesset and had passed its first reading unanimously. On 22 March 2023, the Knesset voted to reject the bill. It had been urged to do so by National Security Minister Itamar Ben-Gvir, who said that the bill was unfair to men. Earlier in the week, Ben-Gvir had blocked the measure from advancing in the ministerial legislative committee. The MKs voting against the bill included Prime Minister Netanyahu. The Association of Families of Murder Victims said that by rejecting the law, National Security Minister Itamar Ben-Gvir "brings joy to violent men and abandons the women threatened with murder… unsupervised restraining orders endanger women's lives even more. They give women the illusion of being protected, and then they are murdered." MK Pnina Tamano-Shata, chairwoman of the Knesset Committee on the Status of Women and Gender Equality, said that "the coalition proved today that it despises women's lives." The NGO Amutat Bat Melech [he], which assists Orthodox and ultra-Orthodox women who suffer from domestic violence, said that: "Rejecting the electronic bracelet bill is disconnected from the terrible reality of seven femicides since the beginning of the year. This is an effective tool of the first degree that could have saved lives and reduced the threat to women suffering from domestic violence. This is a matter of life and death, whose whole purpose is to provide a solution to defend women." The agreement signed by the coalition parties includes the setting up of a committee to draft changes to the Law of Return. Israeli religious parties have long demanded that the "grandchild clause" of the Law of Return be cancelled. This clause grants citizenship to anyone with at least one Jewish grandparent, as long as they do not practice another religion. If the grandchild clause were to be removed from the Law of Return then around 3 million people who are currently eligible for aliyah would no longer be eligible. The heads of the Jewish Agency, the Jewish Federations of North America, the World Zionist Organization and Keren Hayesod sent a joint letter to Prime Minister Netanyahu, expressing their "deep concern" about any changes to the Law of Return, adding that "Any change in the delicate and sensitive status quo on issues such as the Law of Return or conversion could threaten to unravel the ties between us and keep us away from each other." The Executive Council of Australian Jewry and the Zionist Federation of Australia issued a joint statement saying "We… view with deep concern… proposals in relation to religious pluralism and the law of return that risk damaging Israel's… relationship with Diaspora Jewry." On 19 March 2023, Israeli Finance Minister Bezalel Smotrich spoke in Paris at a memorial service for a Likud activist. The lectern at which Smotrich spoke was covered with a flag depicting the 'Greater Land of Israel,' encompassing the whole of Mandatory Palestine, as well as Trans-Jordan. During his speech, Smotrich said that "there's no such thing as Palestinians because there's no such thing as a Palestinian people." He added that the Palestinian people are a fictitious nation invented only to fight the Zionist movement, asking "Is there a Palestinian history or culture? There isn't any." The event received widespread media coverage. On 21 March, a spokesman for the US State Department sharply criticized Smotrich's comments. "The comments, which were delivered at a podium adorned with an inaccurate and provocative map, are offensive, they are deeply concerning, and, candidly, they're dangerous. The Palestinians have a rich history and culture, and the United States greatly values our partnership with the Palestinian people," he said. The Jordanian Foreign Ministry also voiced disapproval: "The Israeli Minister of Finance's use, during his participation in an event held yesterday in Paris, of a map of Israel that includes the borders of the Hashemite Kingdom of Jordan and the occupied Palestinian territories represents a reckless inflammatory act, and a violation of international norms and the Jordanian-Israeli peace treaty." Additionally, a map encompassing Mandatory Palestine and Trans-Jordan with a Jordanian flag on it was placed on a central lectern in the Jordanian Parliament. Jordan's parliament voted to expel the Israeli ambassador. Israel's Ministry of Foreign Affairs released a clarification relating to the matter, stating that "Israel is committed to the 1994 peace agreement with Jordan. There has been no change in the position of the State of Israel, which recognizes the territorial integrity of the Hashemite Kingdom of Jordan". Ahead of a Europe Day event due to take place on 9 May 2023, far-right wing National Security Minister Itamar Ben-Gvir was assigned as a representative of the government and a speaker at the event by the government secretariat, which deals with placing ministers at receptions on the occasion of the national days of the foreign embassies. The European Union requested that Ben-Gvir not attend, but the government did not make changes to the plan. On 8 May, the European delegation to Israel cancelled the reception, stating that: "The EU Delegation to Israel is looking forward to celebrating Europe Day on May 9, as it does every year. Regrettably, this year we have decided to cancel the diplomatic reception, as we do not want to offer a platform to someone whose views contradict the values the European Union stands for. However, the Europe Day cultural event for the Israeli public will be maintained to celebrate with our friends and partners in Israel the strong and constructive bilateral relationship". Israel's Opposition Leader Yair Lapid stated: "Sending Itamar Ben-Gvir to a gathering of EU ambassadors is a serious professional mistake. The government is embarrassing a large group of friendly countries, jeopardizing future votes in international institutions, and damaging our foreign relations. Last year, after a decade of efforts, we succeeded in signing an economic-political agreement with the European Union that will contribute to the Israeli economy and our foreign relations. Why risk it, and for what? Ben-Gvir is not a legitimate person in the international community (and not really in Israel either), and sometimes you have to be both wise and just and simply send someone else". On 23 February 2023, Defense Minister Gallant signed an agreement assigning governmental powers in the West Bank to a body to be headed by Minister Bezalel Smotrich, who will effectively become the governor of the West Bank, controlling almost all areas of life in the area, including planning, building and infrastructure. Israeli governments have hitherto been careful to keep the occupation as a military government. The temporary holding of power by an occupying military force, pending a negotiated settlement, is a principle of international law – an expression of the prohibition against obtaining sovereignty through conquest that was introduced in the wake of World War II. An editorial in Haaretz noted that the assignment of governmental powers in the West Bank to a civilian governor, alongside the plan to expand the dual justice system so that Israeli law will apply fully to settlers in the West Bank, constitutes de jure annexation of the West Bank. On 26 February 2023, following the 2023 Huwara shooting in which two Israelis were killed by an unidentified attacker, hundreds of Israeli settlers attacked the Palestinian town of Huwara and three nearby villages, setting alight hundreds of Palestinian homes (some with people in them), businesses, a school, and numerous vehicles, killing one Palestinian man and injuring 100 others. Bezalel Smotrich subsequently called on Twitter for Huwara to be "wiped out" by the Israeli government. Zvika Fogel MK, of the ultra-nationalist Otzma Yehudit, which forms part of the governing coalition, said that he "looks very favorably upon" the results of the rampage. Members of the coalition proposed an amendment to the Disengagement Law, which would allow Israelis to resettle settlements vacated during the 2005 Israeli disengagement from Gaza and the northern West Bank. The evacuated settlements were considered illegal under international law, according to most countries. The proposal was approved for voting by the Foreign Affairs and Defense Committee on 9 March 2023, while the committee was still waiting for briefing materials from the NSS, IDF, MFA and Shin Bet, and was passed on 21 March. The US has requested clarification from Israeli ambassador Michael Herzog. A US State Department spokesman stated that "The U.S. strongly urges Israel to refrain from allowing the return of settlers to the area covered by the legislation, consistent with both former Prime Minister Sharon and the current Israeli Government's commitment to the United States," noting that the actions represent a clear violation of undertakings given by the Sharon government to the Bush administration in 2005 and Netanyahu's far-right coalition to the Biden administration the previous week. Minister of Communication Shlomo Karhi had initially intended to cut the funding of the Israeli Public Broadcasting Corporation (also known by its blanket branding Kan) by 400 million shekels – roughly half of its total budget – closing several departments, and privatizing content creation. In response, the Director-General of the European Broadcasting Union, Noel Curran, sent two urgent letters to Netanyahu, expressing his concerns and calling on the Israeli government to "safeguard the independence of our Member KAN and ensure it is allowed to operate in a sustainable way, with funding that is both stable, adequate, fair, and transparent." On 25 January 2023, nine journalist organizations representing some of Kan's competitors issued a statement of concern, acknowledging the "important contribution of public broadcasting in creating a worthy, unbiased and non-prejudicial journalistic platform", and noting that "the existence of the [broadcasting] corporation as a substantial public broadcast organization strengthens media as a whole, adding to the competition in the market rather than weakening it." They also expressed their concern that the "real reason" for the proposal was actually "an attempt to silence voices from which... [the Minister] doesn't always draw satisfaction". The same day, hundreds of journalists, actors and filmmakers protested in Tel Aviv. The proposal was eventually put on hold. On 22 February 2023 it was reported that Prime Minister Netanyahu was attempting to appoint his close associate Yossi Shelley as the deputy to the National Statistician — a highly sensitive position in charge of providing accurate data for decision makers. The appointment of Shelley, who did not possess the required qualifications for the role, was withdrawn following publication. In its daily editorial, Haaretz tied this attempt with the judicial reform: "once they take control of the judiciary, law enforcement and public media, they wish to control the state's data base, the dry numerical data it uses to plan its future". Netanyahu also proposed Avi Simhon for the role, and eventually froze all appointments at the Israel Central Bureau of Statistics. Also on 22 February 2023, it was revealed that Yoav Kish, the Minister of Education, was promoting a draft government decision change to the National Library of Israel board of directors which would grant him more power over the institution. In response, the Hebrew University — which owned the library until 2008 – announced that if the draft is accepted, it will withdraw its collections from the library. The university's collections, which according to the university constitute some 80% of the library's collection, include the Agnon archive, the original manuscript of Hatikvah, and the Rothschild Haggadah, the oldest known Haggadah. A group of 300 authors and poets signed an open letter against the move, further noting their objection against "political takeover" of public broadcasting, as well as "any legislation that will castrate the judiciary and damage the democratic foundations of the state of Israel". Several days later, it was reported that a series of donors decided to withhold their donations to the library, totaling some 80 million shekels. On 3 March a petition against the move by 1,500 academics, including Israel Prize laureates, was sent to Kish. The proposal has been seen by some as retribution against Shai Nitzan, the former State Attorney and the library's current rector. On 5 March it was reported that the Legal Advisor to the Ministry of Finance, Asi Messing, was withholding the proposal. According to Messing, the proposal – which was being promoted as part of the Economic Arrangements Law – "was not reviewed... by the qualified personnel in the Ministry of Finance, does not align with any of the common goals of the economic plan, was not agreed to by myself and was not approved by the Attorney General." As of February 2023, the government has been debating several proposals that will significantly weaken the Ministry of Environmental Protection, including reducing the environmental regulation of planning and development and electricity production. One of the main proposals, the transferal of a 3 billion shekel fund meant to finance waste management plants from the Ministry of Environmental Protection to the Ministry of the Interior, was eventually withdrawn. The Minister of Environmental Protection, Idit Silman, has been criticized for using for meeting with climate change denialists, for wasteful and personally-motivated travel on the ministry's expense, for politicizing the role, and for engaging in political activity on the ministry's time. The government has been noted for an unusually high number of dismissals and resignations of senior career civil servants, and for the frequent attempts to replace them with candidates with known political associations, who are often less competent. According to sources, Netanyahu and people in his vicinity are seeking out civil servants who were appointed by the previous government, intent on replacing them with people loyal to him. Governmental nominees for various positions have been criticized for lack of expertise. In addition to the nominee to the position of Deputy National Statistician (see above), the Director General of the Ministry of Finance, Shlomi Heisler; the Director General of the Ministry of Justice, Itamar Donenfeld; and the Director General of Ministry of Transport, Moshe Ben Zaken, have all been criticized for incompetence, lack of familiarity with their Ministries' subject matter, lack of interest in the job, or lack of experience in managing large organizations. It has been reported that in some ministries, senior officials were enacting slowdowns as a means for dealing with the new ministers and director generals. On 28 July the director general of the Ministry of Education resigned, citing as reason the societal "rift". Asaf Zalel, a retired Air Force Brigadier General, was appointed in January. When asked about attempts to appoint his personal friend and attorney to the board of directors of a state-owned company, Minister David Amsalem replied: "that is my job, due to my authority to appoint directors. I put forward people that I know and hold in esteem". Under Minister of Transport Miri Regev, the ministry has either dismissed or lost the heads of the National Public Transport Authority, Israel Airports Authority, National Road Safety Authority, Israel Railways, and several officials in Netivei Israel. The current chair of Netivei Israel is Likud member and Regev associate Yigal Amadi, and the legal counsel is Einav Abuhzira, daughter of a former Likud branch chair. Abuhzira was appointed instead of Elad Berdugo, nephew of Netanyahu surrogate Yaakov Bardugo, after he was disqualified for the role by the Israel Government Companies Authority. In July 2023 the Ministry of Communications, Shlomo Karhi, and the minister in charge of the Israel Government Companies Authority, Dudi Amsalem, deposed the chair of the Israel Postal Company, Michael Vaknin. The chair, who was hired to lead the company's financial recovery after years of operational loss and towards privatization, has gained the support of officials at the Authority and at the Ministry of Finance; nevertheless, the ministers claimed that his performance is inadequate, and nominated in his place Yiftah Ron-Tal, who has known ties to Netanyahu and Smotrich. They also nominated four new directors, two of which have known political associations, and a third who was a witness in Netanyahu's trial. The coalition is allowed to spend a portion of the state's budget on a discretionary basis, meant to coax member parties to reach an agreement on the budget. As of May 2023, the government was pushing an allocation of over 13 billion shekels over two years - almost seven times the amount allocated by the previous government. Most of the funds will be allocated for uses associated with the religious, orthodox and settler communities. The head of the Budget Department at the Ministry of Finance, Yoav Gardos, objected to the allocations, claiming they would exacerbate unemployment in the Orthodox community, which is projected to cost the economy a total of 6.7 trillion shekels in lost produce by 2065. At the onset of the Gaza war and the declaration of a state of national emergency, Minister of Finance Bezalel Smotrich instructed government agencies to continue with the planned distribution of discretionary funds. Corruption During March 2023, the government was promoting an amendment to the Law on Public Service (Gifts) that would allow Netanyahu to receive donations to fund his legal defense. The amendment follows a decision by the High Court of Justice (HCJ) that forced Netanyahu to refund US$270,000 given to him and his wife by his late cousin, Nathan Mileikowsky, for their legal defense. This is in contrast to past statements by Minister of Justice Yariv Levin, who spoke against the possible conflict of interests that can result from such transactions. The bill was opposed by the Attorney General Gali Baharav-Miara, who stressed that it could "create a real opportunity for governmental corruption", and was eventually withdrawn at the end of March. As of March 2023, the coalition was promoting a bill that would prevent judicial review of ministerial appointments. The bill is intended to prevent the HCJ from reviewing the appointment of the twice-convicted chairman of Shas, Aryeh Deri (convicted of bribery, fraud, and breach of trust), to a ministerial position, after his previous appointment was annulled on grounds of unreasonableness. The bill follows on the heels of another amendment, that relaxed the ban on the appointment of convicted criminals, so that Deri - who was handed a suspended sentence after his second conviction - could be appointed. The bill is opposed by the Attorney General, as well as by the Knesset Legal Adviser, Sagit Afik. Israeli law allows for declaring a Prime Minister (as well as several other high-ranking public officials) to be temporarily or permanently incapacitated, but does not specify the conditions which can lead to a declaration of incapacitation. In the case of the Prime Minister, the authority to do so is given to the Attorney General. In March 2023, the coalition advanced a bill that passes this authority from the Attorney General to the government with the approval of the Knesset committee, and clarified that incapacitation can only result from medical or mental conditions. On 3 January 2024, the Supreme Court ruled by a majority of 6 out of 11 that the validity of the law will be postponed to the next Knesset because the bill in its immediate application is a personal law and is intended to serve a distinct personal purpose. Later, the court rejected a petition regarding the definition of Netanyahu as an incapacitated prime minister due to his ongoing trial and conflict of interests. Notes References External links |
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Contents Python (programming language) Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional programming. Guido van Rossum began working on Python in the late 1980s as a successor to the ABC programming language. Python 3.0, released in 2008, was a major revision and not completely backward-compatible with earlier versions. Beginning with Python 3.5, capabilities and keywords for typing were added to the language, allowing optional static typing. As of 2026[update], the Python Software Foundation supports Python 3.10, 3.11, 3.12, 3.13, and 3.14, following the project's annual release cycle and five-year support policy. Python 3.15 is currently in the alpha development phase, and the stable release is expected to come out in October 2026. Earlier versions in the 3.x series have reached end-of-life and no longer receive security updates. Python has gained widespread use in the machine learning community. It is widely taught as an introductory programming language. Since 2003, Python has consistently ranked in the top ten of the most popular programming languages in the TIOBE Programming Community Index, which ranks based on searches in 24 platforms. History Python was conceived in the late 1980s by Guido van Rossum at Centrum Wiskunde & Informatica (CWI) in the Netherlands. It was designed as a successor to the ABC programming language, which was inspired by SETL, capable of exception handling and interfacing with the Amoeba operating system. Python implementation began in December 1989. Van Rossum first released it in 1991 as Python 0.9.0. Van Rossum assumed sole responsibility for the project, as the lead developer, until 12 July 2018, when he announced his "permanent vacation" from responsibilities as Python's "benevolent dictator for life" (BDFL); this title was bestowed on him by the Python community to reflect his long-term commitment as the project's chief decision-maker. (He has since come out of retirement and is self-titled "BDFL-emeritus".) In January 2019, active Python core developers elected a five-member Steering Council to lead the project. The name Python derives from the British comedy series Monty Python's Flying Circus. (See § Naming.) Python 2.0 was released on 16 October 2000, featuring many new features such as list comprehensions, cycle-detecting garbage collection, reference counting, and Unicode support. Python 2.7's end-of-life was initially set for 2015, and then postponed to 2020 out of concern that a large body of existing code could not easily be forward-ported to Python 3. It no longer receives security patches or updates. While Python 2.7 and older versions are officially unsupported, a different unofficial Python implementation, PyPy, continues to support Python 2, i.e., "2.7.18+" (plus 3.11), with the plus signifying (at least some) "backported security updates". Python 3.0 was released on 3 December 2008, and was a major revision and not completely backward-compatible with earlier versions, with some new semantics and changed syntax. Python 2.7.18, released in 2020, was the last release of Python 2. Several releases in the Python 3.x series have added new syntax to the language, and made a few (considered very minor) backward-incompatible changes. As of January 2026[update], Python 3.14.3 is the latest stable release. All older 3.x versions had a security update down to Python 3.9.24 then again with 3.9.25, the final version in 3.9 series. Python 3.10 is, since November 2025, the oldest supported branch. Python 3.15 has an alpha released, and Android has an official downloadable executable available for Python 3.14. Releases receive two years of full support followed by three years of security support. Design philosophy and features Python is a multi-paradigm programming language. Object-oriented programming and structured programming are fully supported, and many of their features support functional programming and aspect-oriented programming – including metaprogramming and metaobjects. Many other paradigms are supported via extensions, including design by contract and logic programming. Python is often referred to as a 'glue language' because it is purposely designed to be able to integrate components written in other languages. Python uses dynamic typing and a combination of reference counting and a cycle-detecting garbage collector for memory management. It uses dynamic name resolution (late binding), which binds method and variable names during program execution. Python's design offers some support for functional programming in the "Lisp tradition". It has filter, map, and reduce functions; list comprehensions, dictionaries, sets, and generator expressions. The standard library has two modules (itertools and functools) that implement functional tools borrowed from Haskell and Standard ML. Python's core philosophy is summarized in the Zen of Python (PEP 20) written by Tim Peters, which includes aphorisms such as these: However, Python has received criticism for violating these principles and adding unnecessary language bloat. Responses to these criticisms note that the Zen of Python is a guideline rather than a rule. The addition of some new features had been controversial: Guido van Rossum resigned as Benevolent Dictator for Life after conflict about adding the assignment expression operator in Python 3.8. Nevertheless, rather than building all functionality into its core, Python was designed to be highly extensible via modules. This compact modularity has made it particularly popular as a means of adding programmable interfaces to existing applications. Van Rossum's vision of a small core language with a large standard library and easily extensible interpreter stemmed from his frustrations with ABC, which represented the opposite approach. Python claims to strive for a simpler, less-cluttered syntax and grammar, while giving developers a choice in their coding methodology. Python lacks do .. while loops, which Rossum considered harmful. In contrast to Perl's motto "there is more than one way to do it", Python advocates an approach where "there should be one – and preferably only one – obvious way to do it". In practice, however, Python provides many ways to achieve a given goal. There are at least three ways to format a string literal, with no certainty as to which one a programmer should use. Alex Martelli is a Fellow at the Python Software Foundation and Python book author; he wrote that "To describe something as 'clever' is not considered a compliment in the Python culture." Python's developers typically prioritize readability over performance. For example, they reject patches to non-critical parts of the CPython reference implementation that would offer increases in speed that do not justify the cost of clarity and readability.[failed verification] Execution speed can be improved by moving speed-critical functions to extension modules written in languages such as C, or by using a just-in-time compiler like PyPy. Also, it is possible to transpile to other languages. However, this approach either fails to achieve the expected speed-up, since Python is a very dynamic language, or only a restricted subset of Python is compiled (with potential minor semantic changes). Python is meant to be a fun language to use. This goal is reflected in the name – a tribute to the British comedy group Monty Python – and in playful approaches to some tutorials and reference materials. For instance, some code examples use the terms "spam" and "eggs" (in reference to a Monty Python sketch), rather than the typical terms "foo" and "bar". A common neologism in the Python community is pythonic, which has a broad range of meanings related to program style: Pythonic code may use Python idioms well; be natural or show fluency in the language; or conform with Python's minimalist philosophy and emphasis on readability. Syntax and semantics Python is meant to be an easily readable language. Its formatting is visually uncluttered and often uses English keywords where other languages use punctuation. Unlike many other languages, it does not use curly brackets to delimit blocks, and semicolons after statements are allowed but rarely used. It has fewer syntactic exceptions and special cases than C or Pascal. Python uses whitespace indentation, rather than curly brackets or keywords, to delimit blocks. An increase in indentation comes after certain statements; a decrease in indentation signifies the end of the current block. Thus, the program's visual structure accurately represents its semantic structure. This feature is sometimes termed the off-side rule. Some other languages use indentation this way; but in most, indentation has no semantic meaning. The recommended indent size is four spaces. Python's statements include the following: The assignment statement (=) binds a name as a reference to a separate, dynamically allocated object. Variables may subsequently be rebound at any time to any object. In Python, a variable name is a generic reference holder without a fixed data type; however, it always refers to some object with a type. This is called dynamic typing—in contrast to statically-typed languages, where each variable may contain only a value of a certain type. Python does not support tail call optimization or first-class continuations; according to Van Rossum, the language never will. However, better support for coroutine-like functionality is provided by extending Python's generators. Before 2.5, generators were lazy iterators; data was passed unidirectionally out of the generator. From Python 2.5 on, it is possible to pass data back into a generator function; and from version 3.3, data can be passed through multiple stack levels. Python's expressions include the following: In Python, a distinction between expressions and statements is rigidly enforced, in contrast to languages such as Common Lisp, Scheme, or Ruby. This distinction leads to duplicating some functionality, for example: A statement cannot be part of an expression; because of this restriction, expressions such as list and dict comprehensions (and lambda expressions) cannot contain statements. As a particular case, an assignment statement such as a = 1 cannot be part of the conditional expression of a conditional statement. Python uses duck typing, and it has typed objects but untyped variable names. Type constraints are not checked at definition time; rather, operations on an object may fail at usage time, indicating that the object is not of an appropriate type. Despite being dynamically typed, Python is strongly typed, forbidding operations that are poorly defined (e.g., adding a number and a string) rather than quietly attempting to interpret them. Python allows programmers to define their own types using classes, most often for object-oriented programming. New instances of classes are constructed by calling the class, for example, SpamClass() or EggsClass()); the classes are instances of the metaclass type (which is an instance of itself), thereby allowing metaprogramming and reflection. Before version 3.0, Python had two kinds of classes, both using the same syntax: old-style and new-style. Current Python versions support the semantics of only the new style. Python supports optional type annotations. These annotations are not enforced by the language, but may be used by external tools such as mypy to catch errors. Python includes a module typing including several type names for type annotations. Also, mypy supports a Python compiler called mypyc, which leverages type annotations for optimization. 1.33333 frozenset() Python includes conventional symbols for arithmetic operators (+, -, *, /), the floor-division operator //, and the modulo operator %. (With the modulo operator, a remainder can be negative, e.g., 4 % -3 == -2.) Also, Python offers the ** symbol for exponentiation, e.g. 5**3 == 125 and 9**0.5 == 3.0. Also, it offers the matrix‑multiplication operator @ . These operators work as in traditional mathematics; with the same precedence rules, the infix operators + and - can also be unary, to represent positive and negative numbers respectively. Division between integers produces floating-point results. The behavior of division has changed significantly over time: In Python terms, the / operator represents true division (or simply division), while the // operator represents floor division. Before version 3.0, the / operator represents classic division. Rounding towards negative infinity, though a different method than in most languages, adds consistency to Python. For instance, this rounding implies that the equation (a + b)//b == a//b + 1 is always true. Also, the rounding implies that the equation b*(a//b) + a%b == a is valid for both positive and negative values of a. As expected, the result of a%b lies in the half-open interval [0, b), where b is a positive integer; however, maintaining the validity of the equation requires that the result must lie in the interval (b, 0] when b is negative. Python provides a round function for rounding a float to the nearest integer. For tie-breaking, Python 3 uses the round to even method: round(1.5) and round(2.5) both produce 2. Python versions before 3 used the round-away-from-zero method: round(0.5) is 1.0, and round(-0.5) is −1.0. Python allows Boolean expressions that contain multiple equality relations to be consistent with general usage in mathematics. For example, the expression a < b < c tests whether a is less than b and b is less than c. C-derived languages interpret this expression differently: in C, the expression would first evaluate a < b, resulting in 0 or 1, and that result would then be compared with c. Python uses arbitrary-precision arithmetic for all integer operations. The Decimal type/class in the decimal module provides decimal floating-point numbers to a pre-defined arbitrary precision with several rounding modes. The Fraction class in the fractions module provides arbitrary precision for rational numbers. Due to Python's extensive mathematics library and the third-party library NumPy, the language is frequently used for scientific scripting in tasks such as numerical data processing and manipulation. Functions are created in Python by using the def keyword. A function is defined similarly to how it is called, by first providing the function name and then the required parameters. Here is an example of a function that prints its inputs: To assign a default value to a function parameter in case no actual value is provided at run time, variable-definition syntax can be used inside the function header. Code examples "Hello, World!" program: Program to calculate the factorial of a non-negative integer: Libraries Python's large standard library is commonly cited as one of its greatest strengths. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. The language includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals, manipulating regular expressions, and unit testing. Some parts of the standard library are covered by specifications—for example, the Web Server Gateway Interface (WSGI) implementation wsgiref follows PEP 333—but most parts are specified by their code, internal documentation, and test suites. However, because most of the standard library is cross-platform Python code, only a few modules must be altered or rewritten for variant implementations. As of 13 March 2025,[update] the Python Package Index (PyPI), the official repository for third-party Python software, contains over 614,339 packages. Development environments Most[which?] Python implementations (including CPython) include a read–eval–print loop (REPL); this permits the environment to function as a command line interpreter, with which users enter statements sequentially and receive results immediately. Also, CPython is bundled with an integrated development environment (IDE) called IDLE, which is oriented toward beginners.[citation needed] Other shells, including IDLE and IPython, add additional capabilities such as improved auto-completion, session-state retention, and syntax highlighting. Standard desktop IDEs include PyCharm, Spyder, and Visual Studio Code; there are web browser-based IDEs, such as the following environments: Implementations CPython is the reference implementation of Python. This implementation is written in C, meeting the C11 standard since version 3.11. Older versions use the C89 standard with several select C99 features, but third-party extensions are not limited to older C versions—e.g., they can be implemented using C11 or C++. CPython compiles Python programs into an intermediate bytecode, which is then executed by a virtual machine. CPython is distributed with a large standard library written in a combination of C and native Python. CPython is available for many platforms, including Windows and most modern Unix-like systems, including macOS (and Apple M1 Macs, since Python 3.9.1, using an experimental installer). Starting with Python 3.9, the Python installer intentionally fails to install on Windows 7 and 8; Windows XP was supported until Python 3.5, with unofficial support for VMS. Platform portability was one of Python's earliest priorities. During development of Python 1 and 2, even OS/2 and Solaris were supported; since that time, support has been dropped for many platforms. All current Python versions (since 3.7) support only operating systems that feature multithreading, by now supporting not nearly as many operating systems (dropping many outdated) than in the past. All alternative implementations have at least slightly different semantics. For example, an alternative may include unordered dictionaries, in contrast to other current Python versions. As another example in the larger Python ecosystem, PyPy does not support the full C Python API. Creating an executable with Python often is done by bundling an entire Python interpreter into the executable, which causes binary sizes to be massive for small programs, yet there exist implementations that are capable of truly compiling Python. Alternative implementations include the following: Stackless Python is a significant fork of CPython that implements microthreads. This implementation uses the call stack differently, thus allowing massively concurrent programs. PyPy also offers a stackless version. Just-in-time Python compilers have been developed, but are now unsupported: There are several compilers/transpilers to high-level object languages; the source language is unrestricted Python, a subset of Python, or a language similar to Python: There are also specialized compilers: Some older projects existed, as well as compilers not designed for use with Python 3.x and related syntax: A performance comparison among various Python implementations, using a non-numerical (combinatorial) workload, was presented at EuroSciPy '13. In addition, Python's performance relative to other programming languages is benchmarked by The Computer Language Benchmarks Game. There are several approaches to optimizing Python performance, despite the inherent slowness of an interpreted language. These approaches include the following strategies or tools: Language Development Python's development is conducted mostly through the Python Enhancement Proposal (PEP) process; this process is the primary mechanism for proposing major new features, collecting community input on issues, and documenting Python design decisions. Python coding style is covered in PEP 8. Outstanding PEPs are reviewed and commented on by the Python community and the steering council. Enhancement of the language corresponds with development of the CPython reference implementation. The mailing list python-dev is the primary forum for the language's development. Specific issues were originally discussed in the Roundup bug tracker hosted by the foundation. In 2022, all issues and discussions were migrated to GitHub. Development originally took place on a self-hosted source-code repository running Mercurial, until Python moved to GitHub in January 2017. CPython's public releases have three types, distinguished by which part of the version number is incremented: Many alpha, beta, and release-candidates are also released as previews and for testing before final releases. Although there is a rough schedule for releases, they are often delayed if the code is not ready yet. Python's development team monitors the state of the code by running a large unit test suite during development. The major academic conference on Python is PyCon. Also, there are special Python mentoring programs, such as PyLadies. Naming Python's name is inspired by the British comedy group Monty Python, whom Python creator Guido van Rossum enjoyed while developing the language. Monty Python references appear frequently in Python code and culture; for example, the metasyntactic variables often used in Python literature are spam and eggs, rather than the traditional foo and bar. Also, the official Python documentation contains various references to Monty Python routines. Python users are sometimes referred to as "Pythonistas". Languages influenced by Python See also Notes References Further reading External links |
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Contents PlayStation (console) The PlayStation[a] (codenamed PSX, abbreviated as PS, and retroactively PS1 or PS one) is a home video game console developed and marketed by Sony Computer Entertainment. It was released in Japan on 3 December 1994, followed by North America on 9 September 1995, Europe on 29 September 1995, and other regions following thereafter. As a fifth-generation console, the PlayStation primarily competed with the Nintendo 64 and the Sega Saturn. Sony began developing the PlayStation after a failed venture with Nintendo to create a CD-ROM peripheral for the Super Nintendo Entertainment System in the early 1990s. The console was primarily designed by Ken Kutaragi and Sony Computer Entertainment in Japan, while additional development was outsourced in the United Kingdom. An emphasis on 3D polygon graphics was placed at the forefront of the console's design. PlayStation game production was designed to be streamlined and inclusive, enticing the support of many third party developers. The console proved popular for its extensive game library, popular franchises, low retail price, and aggressive youth marketing which advertised it as the preferable console for adolescents and adults. Critically acclaimed games that defined the console include Gran Turismo, Crash Bandicoot, Spyro the Dragon, Tomb Raider, Resident Evil, Metal Gear Solid, Tekken 3, and Final Fantasy VII. Sony ceased production of the PlayStation on 23 March 2006—over eleven years after it had been released, and in the same year the PlayStation 3 debuted. More than 4,000 PlayStation games were released, with cumulative sales of 962 million units. The PlayStation signaled Sony's rise to power in the video game industry. It received acclaim and sold strongly; in less than a decade, it became the first computer entertainment platform to ship over 100 million units. Its use of compact discs heralded the game industry's transition from cartridges. The PlayStation's success led to a line of successors, beginning with the PlayStation 2 in 2000. In the same year, Sony released a smaller and cheaper model, the PS one. History The PlayStation was conceived by Ken Kutaragi, a Sony executive who managed a hardware engineering division and was later dubbed "the Father of the PlayStation". Kutaragi's interest in working with video games stemmed from seeing his daughter play games on Nintendo's Famicom. Kutaragi convinced Nintendo to use his SPC-700 sound processor in the Super Nintendo Entertainment System (SNES) through a demonstration of the processor's capabilities. His willingness to work with Nintendo was derived from both his admiration of the Famicom and conviction in video game consoles becoming the main home-use entertainment systems. Although Kutaragi was nearly fired because he worked with Nintendo without Sony's knowledge, president Norio Ohga recognised the potential in Kutaragi's chip and decided to keep him as a protégé. The inception of the PlayStation dates back to a 1988 joint venture between Nintendo and Sony. Nintendo had produced floppy disk technology to complement cartridges in the form of the Family Computer Disk System, and wanted to continue this complementary storage strategy for the SNES. Since Sony was already contracted to produce the SPC-700 sound processor for the SNES, Nintendo contracted Sony to develop a CD-ROM add-on, tentatively titled the "Play Station" or "SNES-CD". The PlayStation name had already been trademarked by Yamaha, but Nobuyuki Idei liked it so much that he agreed to acquire it for an undisclosed sum rather than search for an alternative. Sony was keen to obtain a foothold in the rapidly expanding video game market. Having been the primary manufacturer of the MSX home computer format, Sony had wanted to use their experience in consumer electronics to produce their own video game hardware. Although the initial agreement between Nintendo and Sony was about producing a CD-ROM drive add-on, Sony had also planned to develop a SNES-compatible Sony-branded console. This iteration was intended to be more of a home entertainment system, playing both SNES cartridges and a new CD format named the "Super Disc", which Sony would design. Under the agreement, Sony would retain sole international rights to every Super Disc game, giving them a large degree of control despite Nintendo's leading position in the video game market. Furthermore, Sony would also be the sole benefactor of licensing related to music and film software that it had been aggressively pursuing as a secondary application. The Play Station was to be announced at the 1991 Consumer Electronics Show (CES) in Las Vegas. However, Nintendo president Hiroshi Yamauchi was wary of Sony's increasing leverage at this point and deemed the original 1988 contract unacceptable upon realising it essentially handed Sony control over all games written on the SNES CD-ROM format. Although Nintendo was dominant in the video game market, Sony possessed a superior research and development department. Wanting to protect Nintendo's existing licensing structure, Yamauchi cancelled all plans for the joint Nintendo–Sony SNES CD attachment without telling Sony. He sent Nintendo of America president Minoru Arakawa (his son-in-law) and chairman Howard Lincoln to Amsterdam to form a more favourable contract with Dutch conglomerate Philips, Sony's rival. This contract would give Nintendo total control over their licences on all Philips-produced machines. Kutaragi and Nobuyuki Idei, Sony's director of public relations at the time, learned of Nintendo's actions two days before the CES was due to begin. Kutaragi telephoned numerous contacts, including Philips, to no avail. On the first day of the CES, Sony announced their partnership with Nintendo and their new console, the Play Station. At 9 am on the next day, in what has been called "the greatest ever betrayal" in the industry, Howard Lincoln stepped onto the stage and revealed that Nintendo was now allied with Philips and would abandon their work with Sony. Incensed by Nintendo's renouncement, Ohga and Kutaragi decided that Sony would develop their own console. Nintendo's contract-breaking was met with consternation in the Japanese business community, as they had broken an "unwritten law" of native companies not turning against each other in favour of foreign ones. Sony's American branch considered allying with Sega to produce a CD-ROM-based machine called the Sega Multimedia Entertainment System, but the Sega board of directors in Tokyo vetoed the idea when Sega of America CEO Tom Kalinske presented them the proposal. Kalinske recalled them saying: "That's a stupid idea, Sony doesn't know how to make hardware. They don't know how to make software either. Why would we want to do this?" Sony halted their research, but decided to develop what it had developed with Nintendo and Sega into a console based on the SNES. Despite the tumultuous events at the 1991 CES, negotiations between Nintendo and Sony were still ongoing. A deal was proposed: the Play Station would still have a port for SNES games, on the condition that it would still use Kutaragi's audio chip and that Nintendo would own the rights and receive the bulk of the profits. Roughly two hundred prototype machines were created, and some software entered development. Many within Sony were still opposed to their involvement in the video game industry, with some resenting Kutaragi for jeopardising the company. Kutaragi remained adamant that Sony not retreat from the growing industry and that a deal with Nintendo would never work. Knowing that they had to take decisive action, Sony severed all ties with Nintendo on 4 May 1992. To determine the fate of the PlayStation project, Ohga chaired a meeting in June 1992, consisting of Kutaragi and several senior Sony board members. Kutaragi unveiled a proprietary CD-ROM-based system he had been secretly working on which played games with immersive 3D graphics. Kutaragi was confident that his LSI chip could accommodate one million logic gates, which exceeded the capabilities of Sony's semiconductor division at the time. Despite gaining Ohga's enthusiasm, there remained opposition from a majority present at the meeting. Older Sony executives also opposed it, who saw Nintendo and Sega as "toy" manufacturers. The opposers felt the game industry was too culturally offbeat and asserted that Sony should remain a central player in the audiovisual industry, where companies were familiar with one another and could conduct "civili[s]ed" business negotiations. After Kutaragi reminded him of the humiliation he suffered from Nintendo, Ohga retained the project and became one of Kutaragi's most staunch supporters. Ohga shifted Kutaragi and nine of his team from Sony's main headquarters to Sony Music Entertainment Japan (SMEJ), a subsidiary of the main Sony group, so as to retain the project and maintain relationships with Philips for the MMCD development project. The involvement of SMEJ proved crucial to the PlayStation's early development as the process of manufacturing games on CD-ROM format was similar to that used for audio CDs, with which Sony's music division had considerable experience. While at SMEJ, Kutaragi worked with Epic/Sony Records founder Shigeo Maruyama and Akira Sato; both later became vice-presidents of the division that ran the PlayStation business. Sony Computer Entertainment (SCE) was jointly established by Sony and SMEJ to handle the company's ventures into the video game industry. On 27 October 1993, Sony publicly announced that it was entering the game console market with the PlayStation. According to Maruyama, there was uncertainty over whether the console should primarily focus on 2D, sprite-based graphics or 3D polygon graphics. After Sony witnessed the success of Sega's Virtua Fighter (1993) in Japanese arcades, the direction of the PlayStation became "instantly clear" and 3D polygon graphics became the console's primary focus. SCE president Teruhisa Tokunaka expressed gratitude for Sega's timely release of Virtua Fighter as it proved "just at the right time" that making games with 3D imagery was possible. Maruyama claimed that Sony further wanted to emphasise the new console's ability to utilise redbook audio from the CD-ROM format in its games alongside high quality visuals and gameplay. Wishing to distance the project from the failed enterprise with Nintendo, Sony initially branded the PlayStation the "PlayStation X" (PSX). Sony formed their European division and North American division, known as Sony Computer Entertainment Europe (SCEE) and Sony Computer Entertainment America (SCEA), in January and May 1995. The divisions planned to market the new console under the alternative branding "PSX" following the negative feedback regarding "PlayStation" in focus group studies. Early advertising prior to the console's launch in North America referenced PSX, but the term was scrapped before launch. The console was not marketed with Sony's name in contrast to Nintendo's consoles. According to Phil Harrison, much of Sony's upper management feared that the Sony brand would be tarnished if associated with the console, which they considered a "toy". Since Sony had no experience in game development, it had to rely on the support of third-party game developers. This was in contrast to Sega and Nintendo, which had versatile and well-equipped in-house software divisions for their arcade games and could easily port successful games to their home consoles. Recent consoles like the Atari Jaguar and 3DO suffered low sales due to a lack of developer support, prompting Sony to redouble their efforts in gaining the endorsement of arcade-savvy developers. A team from Epic Sony visited more than a hundred companies throughout Japan in May 1993 in hopes of attracting game creators with the PlayStation's technological appeal. Sony found that many disliked Nintendo's practices, such as favouring their own games over others. Through a series of negotiations, Sony acquired initial support from Namco, Konami, and Williams Entertainment, as well as 250 other development teams in Japan alone. Namco in particular was interested in developing for PlayStation since Namco rivalled Sega in the arcade market. Attaining these companies secured influential games such as Ridge Racer (1993) and Mortal Kombat 3 (1995), Ridge Racer being one of the most popular arcade games at the time, and it was already confirmed behind closed doors that it would be the PlayStation's first game by December 1993, despite Namco being a longstanding Nintendo developer. Namco's research managing director Shegeichi Nakamura met with Kutaragi in 1993 to discuss the preliminary PlayStation specifications, with Namco subsequently basing the Namco System 11 arcade board on PlayStation hardware and developing Tekken to compete with Virtua Fighter. The System 11 launched in arcades several months before the PlayStation's release, with the arcade release of Tekken in September 1994. Despite securing the support of various Japanese studios, Sony had no developers of their own by the time the PlayStation was in development. This changed in 1993 when Sony acquired the Liverpudlian company Psygnosis (later renamed SCE Liverpool) for US$48 million, securing their first in-house development team. The acquisition meant that Sony could have more launch games ready for the PlayStation's release in Europe and North America. Ian Hetherington, Psygnosis' co-founder, was disappointed after receiving early builds of the PlayStation and recalled that the console "was not fit for purpose" until his team got involved with it. Hetherington frequently clashed with Sony executives over broader ideas; at one point it was suggested that a television with a built-in PlayStation be produced. In the months leading up to the PlayStation's launch, Psygnosis had around 500 full-time staff working on games and assisting with software development. The purchase of Psygnosis marked another turning point for the PlayStation as it played a vital role in creating the console's development kits. While Sony had provided MIPS R4000-based Sony NEWS workstations for PlayStation development, Psygnosis employees disliked the thought of developing on these expensive workstations and asked Bristol-based SN Systems to create an alternative PC-based development system. Andy Beveridge and Martin Day, owners of SN Systems, had previously supplied development hardware for other consoles such as the Mega Drive, Atari ST, and the SNES. When Psygnosis arranged an audience for SN Systems with Sony's Japanese executives at the January 1994 CES in Las Vegas, Beveridge and Day presented their prototype of the condensed development kit, which could run on an ordinary personal computer with two extension boards. Impressed, Sony decided to abandon their plans for a workstation-based development system in favour of SN Systems's, thus securing a cheaper and more efficient method for designing software. An order of over 600 systems followed, and SN Systems supplied Sony with additional software such as an assembler, linker, and a debugger. SN Systems produced development kits for future PlayStation systems, including the PlayStation 2 and was bought out by Sony in 2005. Sony strived to make game production as streamlined and inclusive as possible, in contrast to the relatively isolated approach of Sega and Nintendo. Phil Harrison, representative director of SCEE, believed that Sony's emphasis on developer assistance reduced most time-consuming aspects of development. As well as providing programming libraries, SCE headquarters in London, California, and Tokyo housed technical support teams that could work closely with third-party developers if needed. Sony did not favour their own over non-Sony products, unlike Nintendo; Peter Molyneux of Bullfrog Productions admired Sony's open-handed approach to software developers and lauded their decision to use PCs as a development platform, remarking that "[it was] like being released from jail in terms of the freedom you have". Another strategy that helped attract software developers was the PlayStation's use of the CD-ROM format instead of traditional cartridges. Nintendo cartridges were expensive to manufacture, and the company controlled all production, prioritising their own games, while inexpensive compact disc manufacturing occurred at dozens of locations around the world. The PlayStation's architecture and interconnectability with PCs was beneficial to many software developers. The use of the programming language C proved useful, as it safeguarded future compatibility of the machine should developers decide to make further hardware revisions. Despite the inherent flexibility, some developers found themselves restricted due to the console's lack of RAM. While working on beta builds of the PlayStation, Molyneux observed that its MIPS processor was not "quite as bullish" compared to that of a fast PC and said that it took his team two weeks to port their PC code to the PlayStation development kits and another fortnight to achieve a four-fold speed increase. An engineer from Ocean Software, one of Europe's largest game developers at the time, thought that allocating RAM was a challenging aspect given the 3.5 megabyte restriction. Kutaragi said that while it would have been easy to double the amount of RAM for the PlayStation, the development team refrained from doing so to keep the retail cost down. Kutaragi saw the biggest challenge in developing the system to be balancing the conflicting goals of high performance, low cost, and being easy to program for, and felt he and his team were successful in this regard. Its technical specifications were finalised in 1993 and its design during 1994. The PlayStation name and its final design were confirmed during a press conference on May 10, 1994, although the price and release dates had not been disclosed yet. Sony released the PlayStation in Japan on 3 December 1994, a week after the release of the Sega Saturn, at a price of ¥39,800. Sales in Japan began with a "stunning" success with long queues in shops. Ohga later recalled that he realised how important PlayStation had become for Sony when friends and relatives begged for consoles for their children. PlayStation sold 100,000 units on the first day and two million units within six months, although the Saturn outsold the PlayStation in the first few weeks due to the success of Virtua Fighter. By the end of 1994, 300,000 PlayStation units were sold in Japan compared to 500,000 Saturn units. A grey market emerged for PlayStations shipped from Japan to North America and Europe, with buyers of such consoles paying up to £700. "When September 1995 arrived and Sony's Playstation roared out of the gate, things immediately felt different than [sic] they did with the Saturn launch earlier that year. Sega dropped the Saturn $100 to match the Playstation's $299 debut price, but sales weren't even close—Playstations flew out the door as fast as we could get them in stock. Before the release in North America, Sega and Sony presented their consoles at the first Electronic Entertainment Expo (E3) in Los Angeles on 11 May 1995. At their keynote presentation, Sega of America CEO Tom Kalinske revealed that their Saturn console would be released immediately to select retailers at a price of $399. Next came Sony's turn: Olaf Olafsson, the head of SCEA, summoned Steve Race, the head of development, to the conference stage, who said "$299" and left the audience with a round of applause. The attention to the Sony conference was further bolstered by the surprise appearance of Michael Jackson and the showcase of highly anticipated games, including Wipeout (1995), Ridge Racer and Tekken (1994). In addition, Sony announced that no games would be bundled with the console. Although the Saturn had released early in the United States to gain an advantage over the PlayStation, the surprise launch upset many retailers who were not informed in time, harming sales. Some retailers such as KB Toys responded by dropping the Saturn entirely. The PlayStation went on sale in North America on 9 September 1995. It sold more units within two days than the Saturn had in five months, with almost all of the initial shipment of 100,000 units sold in advance and shops across the country running out of consoles and accessories. The well-received Ridge Racer contributed to the PlayStation's early success, — with some critics considering it superior to Sega's arcade counterpart Daytona USA (1994) — as did Battle Arena Toshinden (1995). There were over 100,000 pre-orders placed and 17 games available on the market by the time of the PlayStation's American launch, in comparison to the Saturn's six launch games. The PlayStation released in Europe on 29 September 1995 and in Australia on 15 November 1995. By November it had already outsold the Saturn by three to one in the United Kingdom, where Sony had allocated a £20 million marketing budget during the Christmas season compared to Sega's £4 million. Sony found early success in the United Kingdom by securing listings with independent shop owners as well as prominent High Street chains such as Comet and Argos. Within its first year, the PlayStation secured over 20% of the entire American video game market. From September to the end of 1995, sales in the United States amounted to 800,000 units, giving the PlayStation a commanding lead over the other fifth-generation consoles,[b] though the SNES and Mega Drive from the fourth generation still outsold it. Sony reported that the attach rate of sold games and consoles was four to one. To meet increasing demand, Sony chartered jumbo jets and ramped up production in Europe and North America. By early 1996, the PlayStation had grossed $2 billion (equivalent to $4.106 billion 2025) from worldwide hardware and software sales. By late 1996, sales in Europe totalled 2.2 million units, including 700,000 in the UK. Approximately 400 PlayStation games were in development, compared to around 200 games being developed for the Saturn and 60 for the Nintendo 64. In India, the PlayStation was launched in test market during 1999–2000 across Sony showrooms, selling 100 units. Sony finally launched the console (PS One model) countrywide on 24 January 2002 with the price of Rs 7,990 and 26 games available from start. PlayStation was also doing well in markets where it was never officially released. For example, in Brazil, due to the registration of the trademark by a third company, the console could not be released, which was why the market was taken over by the officially distributed Sega Saturn during the first period, but as the Sega console withdraws, PlayStation imports and large piracy increased. In another market, China, the most popular 32-bit console was Sega Saturn, but after leaving the market, PlayStation grown with a base of 300,000 users until January 2000, although Sony China did not have plans to release it. The PlayStation was backed by a successful marketing campaign, allowing Sony to gain an early foothold in Europe and North America. Initially, PlayStation demographics were skewed towards adults, but the audience broadened after the first price drop. While the Saturn was positioned towards 18- to 34-year-olds, the PlayStation was initially marketed exclusively towards teenagers. Executives from both Sony and Sega reasoned that because younger players typically looked up to older, more experienced players, advertising targeted at teens and adults would draw them in too. Additionally, Sony found that adults reacted best to advertising aimed at teenagers; Lee Clow surmised that people who started to grow into adulthood regressed and became "17 again" when they played video games. The console was marketed with advertising slogans stylised as "LIVE IN YUR WRLD. PLY IN URS" (Live in Your World. Play in Ours.) and "U R NOT E" (red E). The four geometric shapes were derived from the symbols for the four buttons on the controller. Clow thought that by invoking such provocative statements, gamers would respond to the contrary and say "'Bullshit. Let me show you how ready I am.'" As the console's appeal enlarged, Sony's marketing efforts broadened from their earlier focus on mature players to specifically target younger children as well. Shortly after the PlayStation's release in Europe, Sony tasked marketing manager Geoff Glendenning with assessing the desires of a new target audience. Sceptical over Nintendo and Sega's reliance on television campaigns, Glendenning theorised that young adults transitioning from fourth-generation consoles would feel neglected by marketing directed at children and teenagers. Recognising the influence early 1990s underground clubbing and rave culture had on young people, especially in the United Kingdom, Glendenning felt that the culture had become mainstream enough to help cultivate PlayStation's emerging identity. Sony partnered with prominent nightclub owners such as Ministry of Sound and festival promoters to organise dedicated PlayStation areas where demonstrations of select games could be tested. Sheffield-based graphic design studio The Designers Republic was contracted by Sony to produce promotional materials aimed at a fashionable, club-going audience. Psygnosis' Wipeout in particular became associated with nightclub culture as it was widely featured in venues. By 1997, there were 52 nightclubs in the United Kingdom with dedicated PlayStation rooms. Glendenning recalled that he had discreetly used at least £100,000 a year in slush fund money to invest in impromptu marketing. In 1996, Sony expanded their CD production facilities in the United States due to the high demand for PlayStation games, increasing their monthly output from 4 million discs to 6.5 million discs. This was necessary because PlayStation sales were running at twice the rate of Saturn sales, and its lead dramatically increased when both consoles dropped in price to $199 that year. The PlayStation also outsold the Saturn at a similar ratio in Europe during 1996, with 2.2 million consoles sold in the region by the end of the year. Sales figures for PlayStation hardware and software only increased following the launch of the Nintendo 64. Tokunaka speculated that the Nintendo 64 launch had actually helped PlayStation sales by raising public awareness of the gaming market through Nintendo's added marketing efforts. Despite this, the PlayStation took longer to achieve dominance in Japan. Tokunaka said that, even after the PlayStation and Saturn had been on the market for nearly two years, the competition between them was still "very close", and neither console had led in sales for any meaningful length of time. By 1998, Sega, encouraged by their declining market share and significant financial losses, launched the Dreamcast as a last-ditch attempt to stay in the industry. Although its launch was successful, the technically superior 128-bit console was unable to subdue Sony's dominance in the industry. Sony still held 60% of the overall video game market share in North America at the end of 1999. Sega's initial confidence in their new console was undermined when Japanese sales were lower than expected, with disgruntled Japanese consumers reportedly returning their Dreamcasts in exchange for PlayStation software. On 2 March 1999, Sony officially revealed details of the PlayStation 2, which Kutaragi announced would feature a graphics processor designed to push more raw polygons than any console in history, effectively rivalling most supercomputers. The PlayStation continued to sell strongly at the turn of the new millennium: in June 2000, Sony released the PSOne, a smaller, redesigned variant which went on to outsell all other consoles in that year, including the PlayStation 2. In 2005, PlayStation became the first console to ship 100 million units with the PlayStation 2 later achieving this faster than its predecessor. The combined successes of both PlayStation consoles led to Sega retiring the Dreamcast in 2001, and abandoning the console business entirely. The PlayStation was eventually discontinued on 23 March 2006—over eleven years after its release, and less than a year before the debut of the PlayStation 3. Hardware The main microprocessor is a R3000 CPU made by LSI Logic operating at a clock rate of 33.8688 MHz and 30 MIPS. This 32-bit CPU relies heavily on the "cop2" 3D and matrix math coprocessor on the same die to provide the necessary speed to render complex 3D graphics. The role of the separate GPU chip is to draw 2D polygons and apply shading and textures to them: the rasterisation stage of the graphics pipeline. Sony's custom 16-bit sound chip supports ADPCM sources with up to 24 sound channels and offers a sampling rate of up to 44.1 kHz and music sequencing. It features 2 MB of main RAM, with an additional 1 MB of video RAM. The PlayStation has a maximum colour depth of 16.7 million true colours with 32 levels of transparency and unlimited colour look-up tables. The PlayStation can output composite, S-Video or RGB video signals through its AV Multi connector (with older models also having RCA connectors for composite), displaying resolutions from 256×224 to 640×480 pixels. Different games can use different resolutions. Earlier models also had proprietary parallel and serial ports that could be used to connect accessories or multiple consoles together; these were later removed due to a lack of usage. The PlayStation uses a proprietary video compression unit, MDEC, which is integrated into the CPU and allows for the presentation of full motion video at a higher quality than other consoles of its generation. Unusual for the time, the PlayStation lacks a dedicated 2D graphics processor; 2D elements are instead calculated as polygons by the Geometry Transfer Engine (GTE) so that they can be processed and displayed on screen by the GPU. While running, the GPU can also generate a total of 4,000 sprites and 180,000 polygons per second, in addition to 360,000 per second flat-shaded. The PlayStation went through a number of variants during its production run. Externally, the most notable change was the gradual reduction in the number of external connectors from the rear of the unit. This started with the original Japanese launch units; the SCPH-1000, released on 3 December 1994, was the only model that had an S-Video port, as it was removed from the next model. Subsequent models saw a reduction in number of parallel ports, with the final version only retaining one serial port. Sony marketed a development kit for amateur developers known as the Net Yaroze (meaning "Let's do it together" in Japanese). It was launched in June 1996 in Japan, and following public interest, was released the next year in other countries. The Net Yaroze allowed hobbyists to create their own games and upload them via an online forum run by Sony. The console was only available to buy through an ordering service and with the necessary documentation and software to program PlayStation games and applications through C programming compilers. On 7 July 2000, Sony released the PS One (stylised as "PS one" or "PSone"), a smaller, redesigned version of the original PlayStation. It was the highest-selling console through the end of the year, outselling all other consoles—including the PlayStation 2. In 2002, Sony released a 5-inch (130 mm) LCD screen add-on for the PS One, referred to as the "Combo pack". It also included a car cigarette lighter adaptor adding an extra layer of portability. Production of the LCD "Combo Pack" ceased in 2004, when the popularity of the PlayStation began to wane in markets outside Japan. A total of 28.15 million PS One units had been sold by the time it was discontinued in March 2006. Three iterations of the PlayStation's controller were released over the console's lifespan. The first controller, the PlayStation controller, was released alongside the PlayStation in December 1994. It features four individual directional buttons (as opposed to a conventional D-pad), a pair of shoulder buttons on both sides, Start and Select buttons in the centre, and four face buttons consisting of simple geometric shapes: a green triangle, red circle, blue cross, and a pink square (, , , ). Rather than depicting traditionally used letters or numbers onto its buttons, the PlayStation controller established a trademark which would be incorporated heavily into the PlayStation brand. Teiyu Goto, the designer of the original PlayStation controller, said that the circle and cross represent "yes" and "no", respectively (though this layout is reversed in Western versions); the triangle symbolises a point of view and the square is equated to a sheet of paper to be used to access menus. The European and North American models of the original PlayStation controllers are roughly 10% larger than its Japanese variant, to account for the fact the average person in those regions has larger hands than the average Japanese person. Sony's first analogue gamepad, the PlayStation Analog Joystick (often erroneously referred to as the "Sony Flightstick"), was first released in Japan in April 1996. Featuring two parallel joysticks, it uses potentiometer technology previously used on consoles such as the Vectrex; instead of relying on binary eight-way switches, the controller detects minute angular changes through the entire range of motion. The stick also features a thumb-operated digital hat switch on the right joystick, corresponding to the traditional D-pad, and used for instances when simple digital movements were necessary. The Analog Joystick sold poorly in Japan due to its high cost and cumbersome size. The increasing popularity of 3D games prompted Sony to add analogue sticks to its controller design to give users more freedom over their movements in virtual 3D environments. The first official analogue controller, the Dual Analog Controller, was revealed to the public in a small glass booth at the 1996 PlayStation Expo in Japan, and released in April 1997 to coincide with the Japanese releases of analogue-capable games Tobal 2 and Bushido Blade. In addition to the two analogue sticks (which also introduced two new buttons mapped to clicking in the analogue sticks), the Dual Analog controller features an "Analog" button and LED beneath the "Start" and "Select" buttons which toggles analogue functionality on or off. The controller also features rumble support, though Sony decided that haptic feedback would be removed from all overseas iterations before the United States release. A Sony spokesman stated that the feature was removed for "manufacturing reasons", although rumours circulated that Nintendo had attempted to legally block the release of the controller outside Japan due to similarities with the Nintendo 64 controller's Rumble Pak. However, a Nintendo spokesman denied that Nintendo took legal action. Next Generation's Chris Charla theorised that Sony dropped vibration feedback to keep the price of the controller down. In November 1997, Sony introduced the DualShock controller. Its name derives from its use of two (dual) vibration motors (shock). Unlike its predecessor, its analogue sticks feature textured rubber grips, longer handles, slightly different shoulder buttons and has rumble feedback included as standard on all versions. The DualShock later replaced its predecessors as the default controller. Sony released a series of peripherals to add extra layers of functionality to the PlayStation. Such peripherals include memory cards, the PlayStation Mouse, the PlayStation Link Cable, the Multiplayer Adapter (a four-player multitap), the Memory Drive (a disk drive for 3.5-inch floppy disks), the GunCon (a light gun), and the Glasstron (a monoscopic head-mounted display). Released exclusively in Japan, the PocketStation is a memory card peripheral which acts as a miniature personal digital assistant. The device features a monochrome liquid crystal display (LCD), infrared communication capability, a real-time clock, built-in flash memory, and sound capability. Sharing similarities with the Dreamcast's VMU peripheral, the PocketStation was typically distributed with certain PlayStation games, enhancing them with added features. The PocketStation proved popular in Japan, selling over five million units. Sony planned to release the peripheral outside Japan but the release was cancelled, despite receiving promotion in Europe and North America. In addition to playing games, most PlayStation models are equipped to play CD-Audio. The Asian model SCPH-5903 can also play Video CDs. Like most CD players, the PlayStation can play songs in a programmed order, shuffle the playback order of the disc and repeat one song or the entire disc. Later PlayStation models use a music visualisation function called SoundScope. This function, as well as a memory card manager, is accessed by starting the console without either inserting a game or closing the CD tray, thereby accessing a graphical user interface (GUI) for the PlayStation BIOS. The GUI for the PS One and PlayStation differ depending on the firmware version: the original PlayStation GUI had a dark blue background with rainbow graffiti used as buttons, while the early PAL PlayStation and PS One GUI had a grey blocked background with two icons in the middle. PlayStation emulation is versatile and can be run on numerous modern devices. Bleem! was a commercial emulator which was released for IBM-compatible PCs and the Dreamcast in 1999. It was notable for being aggressively marketed during the PlayStation's lifetime, and was the centre of multiple controversial lawsuits filed by Sony. Bleem! was programmed in assembly language, which allowed it to emulate PlayStation games with improved visual fidelity, enhanced resolutions, and filtered textures that was not possible on original hardware. Sony sued Bleem! two days after its release, citing copyright infringement and accusing the company of engaging in unfair competition and patent infringement by allowing use of PlayStation BIOSs on a Sega console. Bleem! were subsequently forced to shut down in November 2001. Sony was aware that using CDs for game distribution could have left games vulnerable to piracy, due to the growing popularity of CD-R and optical disc drives with burning capability. To preclude illegal copying, a proprietary process for PlayStation disc manufacturing was developed that, in conjunction with an augmented optical drive in Tiger H/E assembly, prevented burned copies of games from booting on an unmodified console. Specifically, all genuine PlayStation discs were printed with a small section of deliberate irregular data, which the PlayStation's optical pick-up was capable of detecting and decoding. Consoles would not boot game discs without a specific wobble frequency contained in the data of the disc pregap sector (the same system was also used to encode discs' regional lockouts). This signal was within Red Book CD tolerances, so PlayStation discs' actual content could still be read by a conventional disc drive; however, the disc drive could not detect the wobble frequency (therefore duplicating the discs omitting it), since the laser pick-up system of any optical disc drive would interpret this wobble as an oscillation of the disc surface and compensate for it in the reading process. Early PlayStations, particularly early 1000 models, experience skipping full-motion video or physical "ticking" noises from the unit. The problems stem from poorly placed vents leading to overheating in some environments, causing the plastic mouldings inside the console to warp slightly and create knock-on effects with the laser assembly. The solution is to sit the console on a surface which dissipates heat efficiently in a well vented area or raise the unit up slightly from its resting surface. Sony representatives also recommended unplugging the PlayStation when it is not in use, as the system draws in a small amount of power (and therefore heat) even when turned off. The first batch of PlayStations use a KSM-440AAM laser unit, whose case and movable parts are all built out of plastic. Over time, the plastic lens sled rail wears out—usually unevenly—due to friction. The placement of the laser unit close to the power supply accelerates wear, due to the additional heat, which makes the plastic more vulnerable to friction. Eventually, one side of the lens sled will become so worn that the laser can tilt, no longer pointing directly at the CD; after this, games will no longer load due to data read errors. Sony fixed the problem by making the sled out of die-cast metal and placing the laser unit further away from the power supply on later PlayStation models. Due to an engineering oversight, the PlayStation does not produce a proper signal on several older models of televisions, causing the display to flicker or bounce around the screen. Sony decided not to change the console design, since only a small percentage of PlayStation owners used such televisions, and instead gave consumers the option of sending their PlayStation unit to a Sony service centre to have an official modchip installed, allowing play on older televisions. Game library The PlayStation featured a diverse game library which grew to appeal to all types of players. Critically acclaimed PlayStation games included Final Fantasy VII (1997), Crash Bandicoot (1996), Spyro the Dragon (1998), Metal Gear Solid (1998), all of which became established franchises. Final Fantasy VII is credited with allowing role-playing games to gain mass-market appeal outside Japan, and is considered one of the most influential and greatest video games ever made. The PlayStation's bestselling game is Gran Turismo (1997), which sold 10.85 million units. After the PlayStation's discontinuation in 2006, the cumulative software shipment was 962 million units. Following its 1994 launch in Japan, early games included Ridge Racer, Crime Crackers, King's Field, Motor Toon Grand Prix, Toh Shin Den (i.e. Battle Arena Toshinden), and Kileak: The Blood. The first two games available at its later North American launch were Jumping Flash! (1995) and Ridge Racer, with Jumping Flash! heralded as an ancestor for 3D graphics in console gaming. Wipeout, Air Combat, Twisted Metal, Warhawk and Destruction Derby were among the popular first-year games, and the first to be reissued as part of Sony's Greatest Hits or Platinum range. At the time of the PlayStation's first Christmas season, Psygnosis had produced around 70% of its launch catalogue; their breakthrough racing game Wipeout was acclaimed for its techno soundtrack and helped raise awareness of Britain's underground music community. Eidos Interactive's action-adventure game Tomb Raider contributed substantially to the success of the console in 1996, with its main protagonist Lara Croft becoming an early gaming icon and garnering unprecedented media promotion. Licensed tie-in video games of popular films were also prevalent; Argonaut Games' 2001 adaptation of Harry Potter and the Philosopher's Stone went on to sell over eight million copies late in the console's lifespan. Third-party developers committed largely to the console's wide-ranging game catalogue even after the launch of the PlayStation 2; some of the notable exclusives in this era include Harry Potter and the Philosopher's Stone, Fear Effect 2: Retro Helix, Syphon Filter 3, C-12: Final Resistance, Dance Dance Revolution Konamix and Digimon World 3.[c] Sony assisted with game reprints as late as 2008 with Metal Gear Solid: The Essential Collection, this being the last PlayStation game officially released and licensed by Sony. Initially, in the United States, PlayStation games were packaged in long cardboard boxes, similar to non-Japanese 3DO and Saturn games. Sony later switched to the jewel case format typically used for audio CDs and Japanese video games, as this format took up less retailer shelf space (which was at a premium due to the large number of PlayStation games being released), and focus testing showed that most consumers preferred this format. Reception The PlayStation was mostly well received upon release. Critics in the west generally welcomed the new console; the staff of Next Generation reviewed the PlayStation a few weeks after its North American launch, where they commented that, while the CPU is "fairly average", the supplementary custom hardware, such as the GPU and sound processor, is stunningly powerful. They praised the PlayStation's focus on 3D, and complemented the comfort of its controller and the convenience of its memory cards. Giving the system 41⁄2 out of 5 stars, they concluded, "To succeed in this extremely cut-throat market, you need a combination of great hardware, great games, and great marketing. Whether by skill, luck, or just deep pockets, Sony has scored three out of three in the first salvo of this war." Albert Kim from Entertainment Weekly praised the PlayStation as a technological marvel, rivalling that of Sega and Nintendo. Famicom Tsūshin scored the console a 19 out of 40, lower than the Saturn's 24 out of 40, in May 1995. In a 1997 year-end review, a team of five Electronic Gaming Monthly editors gave the PlayStation scores of 9.5, 8.5, 9.0, 9.0, and 9.5—for all five editors, the highest score they gave to any of the five consoles reviewed in the issue. They lauded the breadth and quality of the games library, saying it had vastly improved over previous years due to developers mastering the system's capabilities in addition to Sony revising their stance on 2D and role playing games. They also complimented the low price point of the games compared to the Nintendo 64's, and noted that it was the only console on the market that could be relied upon to deliver a solid stream of games for the coming year, primarily due to third party developers almost unanimously favouring it over its competitors. Legacy SCE was an upstart in the video game industry in late 1994, as the video game market in the early 1990s was dominated by Nintendo and Sega. Nintendo had been the clear leader in the industry since the introduction of the Nintendo Entertainment System in 1985 and the Nintendo 64 was initially expected to maintain this position. The PlayStation's target audience included the generation which was the first to grow up with mainstream video games, along with 18- to 29-year-olds who were not the primary focus of Nintendo. By the late 1990s, Sony became a highly regarded console brand due to the PlayStation, with a significant lead over second-place Nintendo, while Sega was relegated to a distant third. The PlayStation became the first "computer entertainment platform" to ship over 100 million units worldwide, with many critics attributing the console's success to third-party developers. It remains the sixth best-selling console of all time as of 2025[update], with a total of 102.49 million units sold. Around 7,900 individual games were published for the console during its 11-year life span, the second-most games ever produced for a console. Its success resulted in a significant financial boon for Sony as profits from their video game division contributed to 23%. Sony's next-generation PlayStation 2, which is backward compatible with the PlayStation's DualShock controller and games, was announced in 1999 and launched in 2000. The PlayStation's lead in installed base and developer support paved the way for the success of its successor, which overcame the earlier launch of the Sega's Dreamcast and then fended off competition from Microsoft's newcomer Xbox and Nintendo's GameCube. The PlayStation 2's immense success and failure of the Dreamcast were among the main factors which led to Sega abandoning the console market. To date, five PlayStation home consoles have been released, which have continued the same numbering scheme, as well as two portable systems. The PlayStation 3 also maintained backward compatibility with original PlayStation discs. Hundreds of PlayStation games have been digitally re-released on the PlayStation Portable, PlayStation 3, PlayStation Vita, PlayStation 4, and PlayStation 5. The PlayStation has often ranked among the best video game consoles. In 2018, Retro Gamer named it the third best console, crediting its sophisticated 3D capabilities as one of its key factors in gaining mass success, and lauding it as a "game-changer in every sense possible". In 2009, IGN ranked the PlayStation the seventh best console in their list, noting its appeal towards older audiences to be a crucial factor in propelling the video game industry, as well as its assistance in transitioning game industry to use the CD-ROM format. Keith Stuart from The Guardian likewise named it as the seventh best console in 2020, declaring that its success was so profound it "ruled the 1990s". In January 2025, Lorentio Brodesco announced the nsOne project, attempting to reverse engineer PlayStation's motherboard. Brodesco stated that "detailed documentation on the original motherboard was either incomplete or entirely unavailable". The project was successfully crowdfunded via Kickstarter. In June, Brodesco manufactured the first working motherboard, promising to bring a fully rooted version with multilayer routing as well as documentation and design files in the near future. The success of the PlayStation contributed to the demise of cartridge-based home consoles. While not the first system to use an optical disc format, it was the first highly successful one, and ended up going head-to-head with the proprietary cartridge-relying Nintendo 64,[d] which the industry had expected to use CDs like PlayStation. After the demise of the Sega Saturn, Nintendo was left as Sony's main competitor in Western markets. Nintendo chose not to use CDs for the Nintendo 64; they were likely concerned with the proprietary cartridge format's ability to help enforce copy protection, given their substantial reliance on licensing and exclusive games for their revenue. Besides their larger capacity, CD-ROMs could be produced in bulk quantities at a much faster rate than ROM cartridges, a week compared to two to three months. Further, the cost of production per unit was far cheaper, allowing Sony to offer games about 40% lower cost to the user compared to ROM cartridges while still making the same amount of net revenue. In Japan, Sony published fewer copies of a wide variety of games for the PlayStation as a risk-limiting step, a model that had been used by Sony Music for CD audio discs. The production flexibility of CD-ROMs meant that Sony could produce larger volumes of popular games to get onto the market quickly, something that could not be done with cartridges due to their manufacturing lead time. The lower production costs of CD-ROMs also allowed publishers an additional source of profit: budget-priced reissues of games which had already recouped their development costs. Tokunaka remarked in 1996: Choosing CD-ROM is one of the most important decisions that we made. As I'm sure you understand, PlayStation could just as easily have worked with masked ROM [cartridges]. The 3D engine and everything—the whole PlayStation format—is independent of the media. But for various reasons (including the economies for the consumer, the ease of the manufacturing, inventory control for the trade, and also the software publishers) we deduced that CD-ROM would be the best media for PlayStation. The increasing complexity of developing games pushed cartridges to their storage limits and gradually discouraged some third-party developers. Part of the CD format's appeal to publishers was that they could be produced at a significantly lower cost and offered more production flexibility to meet demand. As a result, some third-party developers switched to the PlayStation, including Square and Enix, whose Final Fantasy VII and Dragon Quest VII respectively had been planned for the Nintendo 64 (both companies later merged to form Square Enix). Other developers released fewer games for the Nintendo 64 (Konami, releasing only thirteen N64 games but over fifty on the PlayStation). Nintendo 64 game releases were less frequent than the PlayStation's, with many being developed by either Nintendo themselves or second-parties such as Rare. The PlayStation Classic is a dedicated video game console made by Sony Interactive Entertainment that emulates PlayStation games. It was announced in September 2018 at the Tokyo Game Show, and released on 3 December 2018, the 24th anniversary of the release of the original console. As a dedicated console, the PlayStation Classic features 20 pre-installed games; the games run off the open source emulator PCSX. The console is bundled with two replica wired PlayStation controllers (those without analogue sticks), an HDMI cable, and a USB-Type A cable. Internally, the console uses a MediaTek MT8167a Quad A35 system on a chip with four central processing cores clocked at @ 1.5 GHz and a Power VR GE8300 graphics processing unit. It includes 16 GB of eMMC flash storage and 1 Gigabyte of DDR3 SDRAM. The PlayStation Classic is 45% smaller than the original console. The PlayStation Classic received negative reviews from critics and was compared unfavorably to Nintendo's rival Nintendo Entertainment System Classic Edition and Super Nintendo Entertainment System Classic Edition. Criticism was directed at its meagre game library, user interface, emulation quality, use of PAL versions for certain games, use of the original controller, and high retail price, though the console's design received praise. The console sold poorly. See also Notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Social_network#cite_ref-Claridge,_2018_79-0] | [TOKENS: 5247] |
Contents Social network 1800s: Martineau · Tocqueville · Marx · Spencer · Le Bon · Ward · Pareto · Tönnies · Veblen · Simmel · Durkheim · Addams · Mead · Weber · Du Bois · Mannheim · Elias A social network is a social structure consisting of a set of social actors (such as individuals or organizations), networks of dyadic ties, and other social interactions between actors. The social network perspective provides a set of methods for analyzing the structure of whole social entities along with a variety of theories explaining the patterns observed in these structures. The study of these structures uses social network analysis to identify local and global patterns, locate influential entities, and examine dynamics of networks. For instance, social network analysis has been used in studying the spread of misinformation on social media platforms or analyzing the influence of key figures in social networks. Social networks and the analysis of them is an inherently interdisciplinary academic field which emerged from social psychology, sociology, statistics, and graph theory. Georg Simmel authored early structural theories in sociology emphasizing the dynamics of triads and "web of group affiliations". Jacob Moreno is credited with developing the first sociograms in the 1930s to study interpersonal relationships. These approaches were mathematically formalized in the 1950s and theories and methods of social networks became pervasive in the social and behavioral sciences by the 1980s. Social network analysis is now one of the major paradigms in contemporary sociology, and is also employed in a number of other social and formal sciences. Together with other complex networks, it forms part of the nascent field of network science. Overview The social network is a theoretical construct useful in the social sciences to study relationships between individuals, groups, organizations, or even entire societies (social units, see differentiation). The term is used to describe a social structure determined by such interactions. The ties through which any given social unit connects represent the convergence of the various social contacts of that unit. This theoretical approach is, necessarily, relational. An axiom of the social network approach to understanding social interaction is that social phenomena should be primarily conceived and investigated through the properties of relations between and within units, instead of the properties of these units themselves. Thus, one common criticism of social network theory is that individual agency is often ignored although this may not be the case in practice (see agent-based modeling). Precisely because many different types of relations, singular or in combination, form these network configurations, network analytics are useful to a broad range of research enterprises. In social science, these fields of study include, but are not limited to anthropology, biology, communication studies, economics, geography, information science, organizational studies, social psychology, sociology, and sociolinguistics. History In the late 1890s, both Émile Durkheim and Ferdinand Tönnies foreshadowed the idea of social networks in their theories and research of social groups. Tönnies argued that social groups can exist as personal and direct social ties that either link individuals who share values and belief (Gemeinschaft, German, commonly translated as "community") or impersonal, formal, and instrumental social links (Gesellschaft, German, commonly translated as "society"). Durkheim gave a non-individualistic explanation of social facts, arguing that social phenomena arise when interacting individuals constitute a reality that can no longer be accounted for in terms of the properties of individual actors. Georg Simmel, writing at the turn of the twentieth century, pointed to the nature of networks and the effect of network size on interaction and examined the likelihood of interaction in loosely knit networks rather than groups. Major developments in the field can be seen in the 1930s by several groups in psychology, anthropology, and mathematics working independently. In psychology, in the 1930s, Jacob L. Moreno began systematic recording and analysis of social interaction in small groups, especially classrooms and work groups (see sociometry). In anthropology, the foundation for social network theory is the theoretical and ethnographic work of Bronislaw Malinowski, Alfred Radcliffe-Brown, and Claude Lévi-Strauss. A group of social anthropologists associated with Max Gluckman and the Manchester School, including John A. Barnes, J. Clyde Mitchell and Elizabeth Bott Spillius, often are credited with performing some of the first fieldwork from which network analyses were performed, investigating community networks in southern Africa, India and the United Kingdom. Concomitantly, British anthropologist S. F. Nadel codified a theory of social structure that was influential in later network analysis. In sociology, the early (1930s) work of Talcott Parsons set the stage for taking a relational approach to understanding social structure. Later, drawing upon Parsons' theory, the work of sociologist Peter Blau provides a strong impetus for analyzing the relational ties of social units with his work on social exchange theory. By the 1970s, a growing number of scholars worked to combine the different tracks and traditions. One group consisted of sociologist Harrison White and his students at the Harvard University Department of Social Relations. Also independently active in the Harvard Social Relations department at the time were Charles Tilly, who focused on networks in political and community sociology and social movements, and Stanley Milgram, who developed the "six degrees of separation" thesis. Mark Granovetter and Barry Wellman are among the former students of White who elaborated and championed the analysis of social networks. Beginning in the late 1990s, social network analysis experienced work by sociologists, political scientists, and physicists such as Duncan J. Watts, Albert-László Barabási, Peter Bearman, Nicholas A. Christakis, James H. Fowler, and others, developing and applying new models and methods to emerging data available about online social networks, as well as "digital traces" regarding face-to-face networks. Levels of analysis In general, social networks are self-organizing, emergent, and complex, such that a globally coherent pattern appears from the local interaction of the elements that make up the system. These patterns become more apparent as network size increases. However, a global network analysis of, for example, all interpersonal relationships in the world is not feasible and is likely to contain so much information as to be uninformative. Practical limitations of computing power, ethics and participant recruitment and payment also limit the scope of a social network analysis. The nuances of a local system may be lost in a large network analysis, hence the quality of information may be more important than its scale for understanding network properties. Thus, social networks are analyzed at the scale relevant to the researcher's theoretical question. Although levels of analysis are not necessarily mutually exclusive, there are three general levels into which networks may fall: micro-level, meso-level, and macro-level. At the micro-level, social network research typically begins with an individual, snowballing as social relationships are traced, or may begin with a small group of individuals in a particular social context. Dyadic level: A dyad is a social relationship between two individuals. Network research on dyads may concentrate on structure of the relationship (e.g. multiplexity, strength), social equality, and tendencies toward reciprocity/mutuality. Triadic level: Add one individual to a dyad, and you have a triad. Research at this level may concentrate on factors such as balance and transitivity, as well as social equality and tendencies toward reciprocity/mutuality. In the balance theory of Fritz Heider the triad is the key to social dynamics. The discord in a rivalrous love triangle is an example of an unbalanced triad, likely to change to a balanced triad by a change in one of the relations. The dynamics of social friendships in society has been modeled by balancing triads. The study is carried forward with the theory of signed graphs. Actor level: The smallest unit of analysis in a social network is an individual in their social setting, i.e., an "actor" or "ego." Egonetwork analysis focuses on network characteristics, such as size, relationship strength, density, centrality, prestige and roles such as isolates, liaisons, and bridges. Such analyses, are most commonly used in the fields of psychology or social psychology, ethnographic kinship analysis or other genealogical studies of relationships between individuals. Subset level: Subset levels of network research problems begin at the micro-level, but may cross over into the meso-level of analysis. Subset level research may focus on distance and reachability, cliques, cohesive subgroups, or other group actions or behavior. In general, meso-level theories begin with a population size that falls between the micro- and macro-levels. However, meso-level may also refer to analyses that are specifically designed to reveal connections between micro- and macro-levels. Meso-level networks are low density and may exhibit causal processes distinct from interpersonal micro-level networks. Organizations: Formal organizations are social groups that distribute tasks for a collective goal. Network research on organizations may focus on either intra-organizational or inter-organizational ties in terms of formal or informal relationships. Intra-organizational networks themselves often contain multiple levels of analysis, especially in larger organizations with multiple branches, franchises or semi-autonomous departments. In these cases, research is often conducted at a work group level and organization level, focusing on the interplay between the two structures. Experiments with networked groups online have documented ways to optimize group-level coordination through diverse interventions, including the addition of autonomous agents to the groups. Randomly distributed networks: Exponential random graph models of social networks became state-of-the-art methods of social network analysis in the 1980s. This framework has the capacity to represent social-structural effects commonly observed in many human social networks, including general degree-based structural effects commonly observed in many human social networks as well as reciprocity and transitivity, and at the node-level, homophily and attribute-based activity and popularity effects, as derived from explicit hypotheses about dependencies among network ties. Parameters are given in terms of the prevalence of small subgraph configurations in the network and can be interpreted as describing the combinations of local social processes from which a given network emerges. These probability models for networks on a given set of actors allow generalization beyond the restrictive dyadic independence assumption of micro-networks, allowing models to be built from theoretical structural foundations of social behavior. Scale-free networks: A scale-free network is a network whose degree distribution follows a power law, at least asymptotically. In network theory a scale-free ideal network is a random network with a degree distribution that unravels the size distribution of social groups. Specific characteristics of scale-free networks vary with the theories and analytical tools used to create them, however, in general, scale-free networks have some common characteristics. One notable characteristic in a scale-free network is the relative commonness of vertices with a degree that greatly exceeds the average. The highest-degree nodes are often called "hubs", and may serve specific purposes in their networks, although this depends greatly on the social context. Another general characteristic of scale-free networks is the clustering coefficient distribution, which decreases as the node degree increases. This distribution also follows a power law. The Barabási model of network evolution shown above is an example of a scale-free network. Rather than tracing interpersonal interactions, macro-level analyses generally trace the outcomes of interactions, such as economic or other resource transfer interactions over a large population. Large-scale networks: Large-scale network is a term somewhat synonymous with "macro-level." It is primarily used in social and behavioral sciences, and in economics. Originally, the term was used extensively in the computer sciences (see large-scale network mapping). Complex networks: Most larger social networks display features of social complexity, which involves substantial non-trivial features of network topology, with patterns of complex connections between elements that are neither purely regular nor purely random (see, complexity science, dynamical system and chaos theory), as do biological, and technological networks. Such complex network features include a heavy tail in the degree distribution, a high clustering coefficient, assortativity or disassortativity among vertices, community structure (see stochastic block model), and hierarchical structure. In the case of agency-directed networks these features also include reciprocity, triad significance profile (TSP, see network motif), and other features. In contrast, many of the mathematical models of networks that have been studied in the past, such as lattices and random graphs, do not show these features. Theoretical links Various theoretical frameworks have been imported for the use of social network analysis. The most prominent of these are Graph theory, Balance theory, Social comparison theory, and more recently, the Social identity approach. Few complete theories have been produced from social network analysis. Two that have are structural role theory and heterophily theory. The basis of Heterophily Theory was the finding in one study that more numerous weak ties can be important in seeking information and innovation, as cliques have a tendency to have more homogeneous opinions as well as share many common traits. This homophilic tendency was the reason for the members of the cliques to be attracted together in the first place. However, being similar, each member of the clique would also know more or less what the other members knew. To find new information or insights, members of the clique will have to look beyond the clique to its other friends and acquaintances. This is what Granovetter called "the strength of weak ties". Structural holes In the context of networks, social capital exists where people have an advantage because of their location in a network. Contacts in a network provide information, opportunities and perspectives that can be beneficial to the central player in the network. Most social structures tend to be characterized by dense clusters of strong connections. Information within these clusters tends to be rather homogeneous and redundant. Non-redundant information is most often obtained through contacts in different clusters. When two separate clusters possess non-redundant information, there is said to be a structural hole between them. Thus, a network that bridges structural holes will provide network benefits that are in some degree additive, rather than overlapping. An ideal network structure has a vine and cluster structure, providing access to many different clusters and structural holes. Networks rich in structural holes are a form of social capital in that they offer information benefits. The main player in a network that bridges structural holes is able to access information from diverse sources and clusters. For example, in business networks, this is beneficial to an individual's career because he is more likely to hear of job openings and opportunities if his network spans a wide range of contacts in different industries/sectors. This concept is similar to Mark Granovetter's theory of weak ties, which rests on the basis that having a broad range of contacts is most effective for job attainment. Structural holes have been widely applied in social network analysis, resulting in applications in a wide range of practical scenarios as well as machine learning-based social prediction. Research clusters Research has used network analysis to examine networks created when artists are exhibited together in museum exhibition. Such networks have been shown to affect an artist's recognition in history and historical narratives, even when controlling for individual accomplishments of the artist. Other work examines how network grouping of artists can affect an individual artist's auction performance. An artist's status has been shown to increase when associated with higher status networks, though this association has diminishing returns over an artist's career. In J.A. Barnes' day, a "community" referred to a specific geographic location and studies of community ties had to do with who talked, associated, traded, and attended church with whom. Today, however, there are extended "online" communities developed through telecommunications devices and social network services. Such devices and services require extensive and ongoing maintenance and analysis, often using network science methods. Community development studies, today, also make extensive use of such methods. Complex networks require methods specific to modelling and interpreting social complexity and complex adaptive systems, including techniques of dynamic network analysis. Mechanisms such as Dual-phase evolution explain how temporal changes in connectivity contribute to the formation of structure in social networks. The study of social networks is being used to examine the nature of interdependencies between actors and the ways in which these are related to outcomes of conflict and cooperation. Areas of study include cooperative behavior among participants in collective actions such as protests; promotion of peaceful behavior, social norms, and public goods within communities through networks of informal governance; the role of social networks in both intrastate conflict and interstate conflict; and social networking among politicians, constituents, and bureaucrats. In criminology and urban sociology, much attention has been paid to the social networks among criminal actors. For example, murders can be seen as a series of exchanges between gangs. Murders can be seen to diffuse outwards from a single source, because weaker gangs cannot afford to kill members of stronger gangs in retaliation, but must commit other violent acts to maintain their reputation for strength. Diffusion of ideas and innovations studies focus on the spread and use of ideas from one actor to another or one culture and another. This line of research seeks to explain why some become "early adopters" of ideas and innovations, and links social network structure with facilitating or impeding the spread of an innovation. A case in point is the social diffusion of linguistic innovation such as neologisms. Experiments and large-scale field trials (e.g., by Nicholas Christakis and collaborators) have shown that cascades of desirable behaviors can be induced in social groups, in settings as diverse as Honduras villages, Indian slums, or in the lab. Still other experiments have documented the experimental induction of social contagion of voting behavior, emotions, risk perception, and commercial products. In demography, the study of social networks has led to new sampling methods for estimating and reaching populations that are hard to enumerate (for example, homeless people or intravenous drug users.) For example, respondent driven sampling is a network-based sampling technique that relies on respondents to a survey recommending further respondents. The field of sociology focuses almost entirely on networks of outcomes of social interactions. More narrowly, economic sociology considers behavioral interactions of individuals and groups through social capital and social "markets". Sociologists, such as Mark Granovetter, have developed core principles about the interactions of social structure, information, ability to punish or reward, and trust that frequently recur in their analyses of political, economic and other institutions. Granovetter examines how social structures and social networks can affect economic outcomes like hiring, price, productivity and innovation and describes sociologists' contributions to analyzing the impact of social structure and networks on the economy. Analysis of social networks is increasingly incorporated into health care analytics, not only in epidemiological studies but also in models of patient communication and education, disease prevention, mental health diagnosis and treatment, and in the study of health care organizations and systems. Human ecology is an interdisciplinary and transdisciplinary study of the relationship between humans and their natural, social, and built environments. The scientific philosophy of human ecology has a diffuse history with connections to geography, sociology, psychology, anthropology, zoology, and natural ecology. In the study of literary systems, network analysis has been applied by Anheier, Gerhards and Romo, De Nooy, Senekal, and Lotker, to study various aspects of how literature functions. The basic premise is that polysystem theory, which has been around since the writings of Even-Zohar, can be integrated with network theory and the relationships between different actors in the literary network, e.g. writers, critics, publishers, literary histories, etc., can be mapped using visualization from SNA. Research studies of formal or informal organization relationships, organizational communication, economics, economic sociology, and other resource transfers. Social networks have also been used to examine how organizations interact with each other, characterizing the many informal connections that link executives together, as well as associations and connections between individual employees at different organizations. Many organizational social network studies focus on teams. Within team network studies, research assesses, for example, the predictors and outcomes of centrality and power, density and centralization of team instrumental and expressive ties, and the role of between-team networks. Intra-organizational networks have been found to affect organizational commitment, organizational identification, interpersonal citizenship behaviour. Social capital is a form of economic and cultural capital in which social networks are central, transactions are marked by reciprocity, trust, and cooperation, and market agents produce goods and services not mainly for themselves, but for a common good. Social capital is split into three dimensions: the structural, the relational and the cognitive dimension. The structural dimension describes how partners interact with each other and which specific partners meet in a social network. Also, the structural dimension of social capital indicates the level of ties among organizations. This dimension is highly connected to the relational dimension which refers to trustworthiness, norms, expectations and identifications of the bonds between partners. The relational dimension explains the nature of these ties which is mainly illustrated by the level of trust accorded to the network of organizations. The cognitive dimension analyses the extent to which organizations share common goals and objectives as a result of their ties and interactions. Social capital is a sociological concept about the value of social relations and the role of cooperation and confidence to achieve positive outcomes. The term refers to the value one can get from their social ties. For example, newly arrived immigrants can make use of their social ties to established migrants to acquire jobs they may otherwise have trouble getting (e.g., because of unfamiliarity with the local language). A positive relationship exists between social capital and the intensity of social network use. In a dynamic framework, higher activity in a network feeds into higher social capital which itself encourages more activity. This particular cluster focuses on brand-image and promotional strategy effectiveness, taking into account the impact of customer participation on sales and brand-image. This is gauged through techniques such as sentiment analysis which rely on mathematical areas of study such as data mining and analytics. This area of research produces vast numbers of commercial applications as the main goal of any study is to understand consumer behaviour and drive sales. In many organizations, members tend to focus their activities inside their own groups, which stifles creativity and restricts opportunities. A player whose network bridges structural holes has an advantage in detecting and developing rewarding opportunities. Such a player can mobilize social capital by acting as a "broker" of information between two clusters that otherwise would not have been in contact, thus providing access to new ideas, opinions and opportunities. British philosopher and political economist John Stuart Mill, writes, "it is hardly possible to overrate the value of placing human beings in contact with persons dissimilar to themselves.... Such communication [is] one of the primary sources of progress." Thus, a player with a network rich in structural holes can add value to an organization through new ideas and opportunities. This in turn, helps an individual's career development and advancement. A social capital broker also reaps control benefits of being the facilitator of information flow between contacts. Full communication with exploratory mindsets and information exchange generated by dynamically alternating positions in a social network promotes creative and deep thinking. In the case of consulting firm Eden McCallum, the founders were able to advance their careers by bridging their connections with former big three consulting firm consultants and mid-size industry firms. By bridging structural holes and mobilizing social capital, players can advance their careers by executing new opportunities between contacts. There has been research that both substantiates and refutes the benefits of information brokerage. A study of high tech Chinese firms by Zhixing Xiao found that the control benefits of structural holes are "dissonant to the dominant firm-wide spirit of cooperation and the information benefits cannot materialize due to the communal sharing values" of such organizations. However, this study only analyzed Chinese firms, which tend to have strong communal sharing values. Information and control benefits of structural holes are still valuable in firms that are not quite as inclusive and cooperative on the firm-wide level. In 2004, Ronald Burt studied 673 managers who ran the supply chain for one of America's largest electronics companies. He found that managers who often discussed issues with other groups were better paid, received more positive job evaluations and were more likely to be promoted. Thus, bridging structural holes can be beneficial to an organization, and in turn, to an individual's career. Computer networks combined with social networking software produce a new medium for social interaction. A relationship over a computerized social networking service can be characterized by context, direction, and strength. The content of a relation refers to the resource that is exchanged. In a computer-mediated communication context, social pairs exchange different kinds of information, including sending a data file or a computer program as well as providing emotional support or arranging a meeting. With the rise of electronic commerce, information exchanged may also correspond to exchanges of money, goods or services in the "real" world. Social network analysis methods have become essential to examining these types of computer mediated communication. In addition, the sheer size and the volatile nature of social media has given rise to new network metrics. A key concern with networks extracted from social media is the lack of robustness of network metrics given missing data. Based on the pattern of homophily, ties between people are most likely to occur between nodes that are most similar to each other, or within neighbourhood segregation, individuals are most likely to inhabit the same regional areas as other individuals who are like them. Therefore, social networks can be used as a tool to measure the degree of segregation or homophily within a social network. Social Networks can both be used to simulate the process of homophily but it can also serve as a measure of level of exposure of different groups to each other within a current social network of individuals in a certain area. See also References Further reading External links |
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Category:Internet properties established in 1994 Notable websites and internet companies/resources established in 1994. Subcategories This category has only the following subcategory. Pages in category "Internet properties established in 1994" The following 87 pages are in this category, out of 87 total. This list may not reflect recent changes. |
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Contents Meta Platforms Meta Platforms, Inc. (doing business as Meta) is an American multinational technology company headquartered in Menlo Park, California. Meta owns and operates several prominent social media platforms and communication services, including Facebook, Instagram, WhatsApp, Messenger, Threads and Manus. The company also operates an advertising network for its own sites and third parties; as of 2023[update], advertising accounted for 97.8 percent of its total revenue. Meta has been described as a part of Big Tech, which refers to the largest six tech companies in the United States, Alphabet (Google), Amazon, Apple, Meta (Facebook), Microsoft, and Nvidia, which are also the largest companies in the world by market capitalization. The company was originally established in 2004 as TheFacebook, Inc., and was renamed Facebook, Inc. in 2005. In 2021, it rebranded as Meta Platforms, Inc. to reflect a strategic shift toward developing the metaverse—an interconnected digital ecosystem spanning virtual and augmented reality technologies. In 2023, Meta was ranked 31st on the Forbes Global 2000 list of the world's largest public companies. As of 2022, it was the world's third-largest spender on research and development, with R&D expenses totaling US$35.3 billion. History Facebook filed for an initial public offering (IPO) on January 1, 2012. The preliminary prospectus stated that the company sought to raise $5 billion, had 845 million monthly active users, and a website accruing 2.7 billion likes and comments daily. After the IPO, Zuckerberg would retain 22% of the total shares and 57% of the total voting power in Facebook. Underwriters valued the shares at $38 each, valuing the company at $104 billion, the largest valuation yet for a newly public company. On May 16, one day before the IPO, Facebook announced it would sell 25% more shares than originally planned due to high demand. The IPO raised $16 billion, making it the third-largest in US history (slightly ahead of AT&T Mobility and behind only General Motors and Visa). The stock price left the company with a higher market capitalization than all but a few U.S. corporations—surpassing heavyweights such as Amazon, McDonald's, Disney, and Kraft Foods—and made Zuckerberg's stock worth $19 billion. The New York Times stated that the offering overcame questions about Facebook's difficulties in attracting advertisers to transform the company into a "must-own stock". Jimmy Lee of JPMorgan Chase described it as "the next great blue-chip". Writers at TechCrunch, on the other hand, expressed skepticism, stating, "That's a big multiple to live up to, and Facebook will likely need to add bold new revenue streams to justify the mammoth valuation." Trading in the stock, which began on May 18, was delayed that day due to technical problems with the Nasdaq exchange. The stock struggled to stay above the IPO price for most of the day, forcing underwriters to buy back shares to support the price. At the closing bell, shares were valued at $38.23, only $0.23 above the IPO price and down $3.82 from the opening bell value. The opening was widely described by the financial press as a disappointment. The stock set a new record for trading volume of an IPO. On May 25, 2012, the stock ended its first full week of trading at $31.91, a 16.5% decline. On May 22, 2012, regulators from Wall Street's Financial Industry Regulatory Authority announced that they had begun to investigate whether banks underwriting Facebook had improperly shared information only with select clients rather than the general public. Massachusetts Secretary of State William F. Galvin subpoenaed Morgan Stanley over the same issue. The allegations sparked "fury" among some investors and led to the immediate filing of several lawsuits, one of them a class action suit claiming more than $2.5 billion in losses due to the IPO. Bloomberg estimated that retail investors may have lost approximately $630 million on Facebook stock since its debut. S&P Global Ratings added Facebook to its S&P 500 index on December 21, 2013. On May 2, 2014, Zuckerberg announced that the company would be changing its internal motto from "Move fast and break things" to "Move fast with stable infrastructure". The earlier motto had been described as Zuckerberg's "prime directive to his developers and team" in a 2009 interview in Business Insider, in which he also said, "Unless you are breaking stuff, you are not moving fast enough." In November 2016, Facebook announced the Microsoft Windows client of gaming service Facebook Gameroom, formerly Facebook Games Arcade, at the Unity Technologies developers conference. The client allows Facebook users to play "native" games in addition to its web games. The service was closed in June 2021. Lasso was a short-video sharing app from Facebook similar to TikTok that was launched on iOS and Android in 2018 and was aimed at teenagers. On July 2, 2020, Facebook announced that Lasso would be shutting down on July 10. In 2018, the Oculus lead Jason Rubin sent his 50-page vision document titled "The Metaverse" to Facebook's leadership. In the document, Rubin acknowledged that Facebook's virtual reality business had not caught on as expected, despite the hundreds of millions of dollars spent on content for early adopters. He also urged the company to execute fast and invest heavily in the vision, to shut out HTC, Apple, Google and other competitors in the VR space. Regarding other players' participation in the metaverse vision, he called for the company to build the "metaverse" to prevent their competitors from "being in the VR business in a meaningful way at all". In May 2019, Facebook founded Libra Networks, reportedly to develop their own stablecoin cryptocurrency. Later, it was reported that Libra was being supported by financial companies such as Visa, Mastercard, PayPal and Uber. The consortium of companies was expected to pool in $10 million each to fund the launch of the cryptocurrency coin named Libra. Depending on when it would receive approval from the Swiss Financial Market Supervisory authority to operate as a payments service, the Libra Association had planned to launch a limited format cryptocurrency in 2021. Libra was renamed Diem, before being shut down and sold in January 2022 after backlash from Swiss government regulators and the public. During the COVID-19 pandemic, the use of online services, including Facebook, grew globally. Zuckerberg predicted this would be a "permanent acceleration" that would continue after the pandemic. Facebook hired aggressively, growing from 48,268 employees in March 2020 to more than 87,000 by September 2022. Following a period of intense scrutiny and damaging whistleblower leaks, news started to emerge on October 21, 2021 about Facebook's plan to rebrand the company and change its name. In the Q3 2021 earnings call on October 25, Mark Zuckerberg discussed the ongoing criticism of the company's social services and the way it operates, and pointed to the pivoting efforts to building the metaverse – without mentioning the rebranding and the name change. The metaverse vision and the name change from Facebook, Inc. to Meta Platforms was introduced at Facebook Connect on October 28, 2021. Based on Facebook's PR campaign, the name change reflects the company's shifting long term focus of building the metaverse, a digital extension of the physical world by social media, virtual reality and augmented reality features. "Meta" had been registered as a trademark in the United States in 2018 (after an initial filing in 2015) for marketing, advertising, and computer services, by a Canadian company that provided big data analysis of scientific literature. This company was acquired in 2017 by the Chan Zuckerberg Initiative (CZI), a foundation established by Zuckerberg and his wife, Priscilla Chan, and became one of their projects. Following the rebranding announcement, CZI announced that it had already decided to deprioritize the earlier Meta project, thus it would be transferring its rights to the name to Meta Platforms, and the previous project would end in 2022. Soon after the rebranding, in early February 2022, Meta reported a greater-than-expected decline in profits in the fourth quarter of 2021. It reported no growth in monthly users, and indicated it expected revenue growth to stall. It also expected measures taken by Apple Inc. to protect user privacy to cost it some $10 billion in advertisement revenue, an amount equal to roughly 8% of its revenue for 2021. In meeting with Meta staff the day after earnings were reported, Zuckerberg blamed competition for user attention, particularly from video-based apps such as TikTok. The 27% reduction in the company's share price which occurred in reaction to the news eliminated some $230 billion of value from Meta's market capitalization. Bloomberg described the decline as "an epic rout that, in its sheer scale, is unlike anything Wall Street or Silicon Valley has ever seen". Zuckerberg's net worth fell by as much as $31 billion. Zuckerberg owns 13% of Meta, and the holding makes up the bulk of his wealth. According to published reports by Bloomberg on March 30, 2022, Meta turned over data such as phone numbers, physical addresses, and IP addresses to hackers posing as law enforcement officials using forged documents. The law enforcement requests sometimes included forged signatures of real or fictional officials. When asked about the allegations, a Meta representative said, "We review every data request for legal sufficiency and use advanced systems and processes to validate law enforcement requests and detect abuse." In June 2022, Sheryl Sandberg, the chief operating officer of 14 years, announced she would step down that year. Zuckerberg said that Javier Olivan would replace Sandberg, though in a “more traditional” role. In March 2022, Meta (except Meta-owned WhatsApp) and Instagram were banned in Russia and added to the Russian list of terrorist and extremist organizations for alleged Russophobia and hate speech (up to genocidal calls) amid the ongoing Russian invasion of Ukraine. Meta appealed against the ban, but it was upheld by a Moscow court in June of the same year. Also in March 2022, Meta and Italian eyewear giant Luxottica released Ray-Ban Stories, a series of smartglasses which could play music and take pictures. Meta and Luxottica parent company EssilorLuxottica declined to disclose sales on the line of products as of September 2022, though Meta has expressed satisfaction with its customer feedback. In July 2022, Meta saw its first year-on-year revenue decline when its total revenue slipped by 1% to $28.8bn. Analysts and journalists accredited the loss to its advertising business, which has been limited by Apple's app tracking transparency feature and the number of people who have opted not to be tracked by Meta apps. Zuckerberg also accredited the decline to increasing competition from TikTok. On October 27, 2022, Meta's market value dropped to $268 billion, a loss of around $700 billion compared to 2021, and its shares fell by 24%. It lost its spot among the top 20 US companies by market cap, despite reaching the top 5 in the previous year. In November 2022, Meta laid off 11,000 employees, 13% of its workforce. Zuckerberg said the decision to aggressively increase Meta's investments had been a mistake, as he had wrongly predicted that the surge in e-commerce would last beyond the COVID-19 pandemic. He also attributed the decline to increased competition, a global economic downturn and "ads signal loss". Plans to lay off a further 10,000 employees began in April 2023. The layoffs were part of a general downturn in the technology industry, alongside layoffs by companies including Google, Amazon, Tesla, Snap, Twitter and Lyft. Starting from 2022, Meta scrambled to catch up to other tech companies in adopting specialized artificial intelligence hardware and software. It had been using less expensive CPUs instead of GPUs for AI work, but that approach turned out to be less efficient. The company gifted the Inter-university Consortium for Political and Social Research $1.3 million to finance the Social Media Archive's aim to make their data available to social science research. In 2023, Ireland's Data Protection Commissioner imposed a record EUR 1.2 billion fine on Meta for transferring data from Europe to the United States without adequate protections for EU citizens.: 250 In March 2023, Meta announced a new round of layoffs that would cut 10,000 employees and close 5,000 open positions to make the company more efficient. Meta revenue surpassed analyst expectations for the first quarter of 2023 after announcing that it was increasing its focus on AI. On July 6, Meta launched a new app, Threads, a competitor to Twitter. Meta announced its artificial intelligence model Llama 2 in July 2023, available for commercial use via partnerships with major cloud providers like Microsoft. It was the first project to be unveiled out of Meta's generative AI group after it was set up in February. It would not charge access or usage but instead operate with an open-source model to allow Meta to ascertain what improvements need to be made. Prior to this announcement, Meta said it had no plans to release Llama 2 for commercial use. An earlier version of Llama was released to academics. In August 2023, Meta announced its permanent removal of news content from Facebook and Instagram in Canada due to the Online News Act, which requires Canadian news outlets to be compensated for content shared on its platform. The Online News Act was in effect by year-end, but Meta will not participate in the regulatory process. In October 2023, Zuckerberg said that AI would be Meta's biggest investment area in 2024. Meta finished 2023 as one of the best-performing technology stocks of the year, with its share price up 150 percent. Its stock reached an all-time high in January 2024, bringing Meta within 2% of achieving $1 trillion market capitalization. In November 2023 Meta Platforms launched an ad-free service in Europe, allowing subscribers to opt-out of personal data being collected for targeted advertising. A group of 28 European organizations, including Max Schrems' advocacy group NOYB, the Irish Council for Civil Liberties, Wikimedia Europe, and the Electronic Privacy Information Center, signed a 2024 letter to the European Data Protection Board (EDPB) expressing concern that this subscriber model would undermine privacy protections, specifically GDPR data protection standards. Meta removed the Facebook and Instagram accounts of Iran's Supreme Leader Ali Khamenei in February 2024, citing repeated violations of its Dangerous Organizations & Individuals policy. As of March, Meta was under investigation by the FDA for alleged use of their social media platforms to sell illegal drugs. On 16 May 2024, the European Commission began an investigation into Meta over concerns related to child safety. In May 2023, Iraqi social media influencer Esaa Ahmed-Adnan encountered a troubling issue when Instagram removed his posts, citing false copyright violations despite his content being original and free from copyrighted material. He discovered that extortionists were behind these takedowns, offering to restore his content for $3,000 or provide ongoing protection for $1,000 per month. This scam, exploiting Meta’s rights management tools, became widespread in the Middle East, revealing a gap in Meta’s enforcement in developing regions. An Iraqi nonprofit Tech4Peace’s founder, Aws al-Saadi helped Ahmed-Adnan and others, but the restoration process was slow, leading to significant financial losses for many victims, including prominent figures like Ammar al-Hakim. This situation highlighted Meta’s challenges in balancing global growth with effective content moderation and protection. On 16 September 2024, Meta announced it had banned Russian state media outlets from its platforms worldwide due to concerns about "foreign interference activity." This decision followed allegations that RT and its employees funneled $10 million through shell companies to secretly fund influence campaigns on various social media channels. Meta's actions were part of a broader effort to counter Russian covert influence operations, which had intensified since the invasion. At its 2024 Connect conference, Meta presented Orion, its first pair of augmented reality glasses. Though Orion was originally intended to be sold to consumers, the manufacturing process turned out to be too complex and expensive. Instead, the company pivoted to producing a small number of the glasses to be used internally. On 4 October 2024, Meta announced about its new AI model called Movie Gen, capable of generating realistic video and audio clips based on user prompts. Meta stated it would not release Movie Gen for open development, preferring to collaborate directly with content creators and integrate it into its products by the following year. The model was built using a combination of licensed and publicly available datasets. On October 31, 2024, ProPublica published an investigation into deceptive political advertisement scams that sometimes use hundreds of hijacked profiles and facebook pages run by organized networks of scammers. The authors cited spotty enforcement by Meta as a major reason for the extent of the issue. In November 2024, TechCrunch reported that Meta were considering building a $10bn global underwater cable spanning 25,000 miles. In the same month, Meta closed down 2 million accounts on Facebook and Instagram that were linked to scam centers in Myanmar, Laos, Cambodia, the Philippines, and the United Arab Emirates doing pig butchering scams. In December 2024, Meta announced that, beginning February 2025, they would require advertisers to run ads about financial services in Australia to verify information about who are the beneficiary and the payer in a bid to regulate scams. On December 4, 2024, Meta announced it will invest US$10 billion for its largest AI data center in northeast Louisiana, powered by natural gas facilities. On the 11th of that month, Meta experienced a global outage, impacting accounts on all of their social media and messaging applications. Outage reports from DownDetector reached 70,000+ and 100,000+ within minutes for Instagram and Facebook, respectively. In January 2025, Meta announced plans to roll back its diversity, equity, and inclusion (DEI) initiatives, citing shifts in the "legal and policy landscape" in the United States following the 2024 presidential election. The decision followed reports that CEO Mark Zuckerberg sought to align the company more closely with the incoming Trump administration, including changes to content moderation policies and executive leadership. The new content moderation policies continued to bar insults about a person's intellect or mental illness, but made an exception to allow calling LGBTQ people mentally ill because they are gay or transgender. Later that month, Meta agreed to pay $25 million to settle a 2021 lawsuit brought by Donald Trump for suspending his social media accounts after the January 6 riots. Changes to Meta's moderation policies were controversial among its oversight board, with a significant divide in opinion between the board's US conservatives and its global members. In June 2025, Meta Platforms Inc. has decided to make a multibillion-dollar investment into artificial intelligence startup Scale AI. The financing could exceed $10 billion in value which would make it one of the largest private company funding events of all time. In October 2025, it was announced that Meta would be laying off 600 employees in the artificial intelligence unit to perform better and simpler. They referred to their AI unit as "bloated" and are seeking to trim down the department. This mass layoff is going to impact Meta’s AI infrastructure units, Fundamental Artificial Intelligence Research unit (FAIR) and other product-related positions. Mergers and acquisitions Meta has acquired multiple companies (often identified as talent acquisitions). One of its first major acquisitions was in April 2012, when it acquired Instagram for approximately US$1 billion in cash and stock. In October 2013, Facebook, Inc. acquired Onavo, an Israeli mobile web analytics company. In February 2014, Facebook, Inc. announced it would buy mobile messaging company WhatsApp for US$19 billion in cash and stock. The acquisition was completed on October 6. Later that year, Facebook bought Oculus VR for $2.3 billion in cash and stock, which released its first consumer virtual reality headset in 2016. In late November 2019, Facebook, Inc. announced the acquisition of the game developer Beat Games, responsible for developing one of that year's most popular VR games, Beat Saber. In Late 2022, after Facebook Inc rebranded to Meta Platforms Inc, Oculus was rebranded to Meta Quest. In May 2020, Facebook, Inc. announced it had acquired Giphy for a reported cash price of $400 million. It will be integrated with the Instagram team. However, in August 2021, UK's Competition and Markets Authority (CMA) stated that Facebook, Inc. might have to sell Giphy, after an investigation found that the deal between the two companies would harm competition in display advertising market. Facebook, Inc. was fined $70 million by CMA for deliberately failing to report all information regarding the acquisition and the ongoing antitrust investigation. In October 2022, the CMA ruled for a second time that Meta be required to divest Giphy, stating that Meta already controls half of the advertising in the UK. Meta agreed to the sale, though it stated that it disagrees with the decision itself. In May 2023, Giphy was divested to Shutterstock for $53 million. In November 2020, Facebook, Inc. announced that it planned to purchase the customer-service platform and chatbot specialist startup Kustomer to promote companies to use their platform for business. It has been reported that Kustomer valued at slightly over $1 billion. The deal was closed in February 2022 after regulatory approval. In September 2022, Meta acquired Lofelt, a Berlin-based haptic tech startup. In December 2025, it was announced Meta had acquired the AI-wearables startup, Limitless. In the same month, they also acquired another AI startup, Manus AI, for $2 billion. Manus announced in December that its platform had achieved $100mm in recurring revenue just 8 months after its launch and Meta said it will scale the platform to many other businesses. In January 2026, it was announced Meta proposed acquisition of Manus was undergoing preliminary scrutiny by Chinese regulators. The examination concerns the cross-border transfer of artificial intelligence technology developed in China. Lobbying In 2020, Facebook, Inc. spent $19.7 million on lobbying, hiring 79 lobbyists. In 2019, it had spent $16.7 million on lobbying and had a team of 71 lobbyists, up from $12.6 million and 51 lobbyists in 2018. Facebook was the largest spender of lobbying money among the Big Tech companies in 2020. The lobbying team includes top congressional aide John Branscome, who was hired in September 2021, to help the company fend off threats from Democratic lawmakers and the Biden administration. In December 2024, Meta donated $1 million to the inauguration fund for then-President-elect Donald Trump. In 2025, Meta was listed among the donors funding the construction of the White House State Ballroom. Partnerships February 2026, Meta announced a long-term partnership with Nvidia. Censorship In August 2024, Mark Zuckerberg sent a letter to Jim Jordan indicating that during the COVID-19 pandemic the Biden administration repeatedly asked Meta to limit certain COVID-19 content, including humor and satire, on Facebook and Instagram. In 2016 Meta hired Jordana Cutler, formerly an employee at the Israeli Embassy to the United States, as its policy chief for Israel and the Jewish Diaspora. In this role, Cutler pushed for the censorship of accounts belonging to Students for Justice in Palestine chapters in the United States. Critics have said that Cutler's position gives the Israeli government an undue influence over Meta policy, and that few countries have such high levels of contact with Meta policymakers. Following the election of Donald Trump in 2025, various sources noted possible censorship related to the Democratic Party on Instagram and other Meta platforms. In February 2025, a Meta rep flagged journalist Gil Duran's article and other "critiques of tech industry figures" as spam or sensitive content, limiting their reach. In March 2025, Meta attempted to block former employee Sarah Wynn-Williams from promoting or further distributing her memoir, Careless People, that includes allegations of unaddressed sexual harassment in the workplace by senior executives. The New York Times reports that the arbitration is among Meta's most forcible attempts to repudiate a former employee's account of workplace dynamics. Publisher Macmillan reacted to the ruling by the Emergency International Arbitral Tribunal by stating that it will ignore its provisions. As of 15 March 2025[update], hardback and digital versions of Careless People were being offered for sale by major online retailers. From October 2025, Meta began removing and restricting access for accounts related to LGBTQ, reproductive health and abortion information pages on its platforms. Martha Dimitratou, executive director of Repro Uncensored, called Meta's shadow-banning of these issues "One of the biggest waves of censorship we are seeing". Disinformation concerns Since its inception, Meta has been accused of being a host for fake news and misinformation. In the wake of the 2016 United States presidential election, Zuckerberg began to take steps to eliminate the prevalence of fake news, as the platform had been criticized for its potential influence on the outcome of the election. The company initially partnered with ABC News, the Associated Press, FactCheck.org, Snopes and PolitiFact for its fact-checking initiative; as of 2018, it had over 40 fact-checking partners across the world, including The Weekly Standard. A May 2017 review by The Guardian found that the platform's fact-checking initiatives of partnering with third-party fact-checkers and publicly flagging fake news were regularly ineffective, and appeared to be having minimal impact in some cases. In 2018, journalists working as fact-checkers for the company criticized the partnership, stating that it had produced minimal results and that the company had ignored their concerns. In 2024 Meta's decision to continue to disseminate a falsified video of US president Joe Biden, even after it had been proven to be fake, attracted criticism and concern. In January 2025, Meta ended its use of third-party fact-checkers in favor of a user-run community notes system similar to the one used on X. While Zuckerberg supported these changes, saying that the amount of censorship on the platform was excessive, the decision received criticism by fact-checking institutions, stating that the changes would make it more difficult for users to identify misinformation. Meta also faced criticism for weakening its policies on hate speech that were designed to protect minorities and LGBTQ+ individuals from bullying and discrimination. While moving its content review teams from California to Texas, Meta changed their hateful conduct policy to eliminate restrictions on anti-LGBT and anti-immigrant hate speech, as well as explicitly allowing users to accuse LGBT people of being mentally ill or abnormal based on their sexual orientation or gender identity. In January 2025, Meta faced significant criticism for its role in removing LGBTQ+ content from its platforms, amid its broader efforts to address anti-LGBTQ+ hate speech. The removal of LGBTQ+ themes was noted as part of the wider crackdown on content deemed to violate its community guidelines. Meta's content moderation policies, which were designed to combat harmful speech and protect users from discrimination, inadvertently led to the removal or restriction of LGBTQ+ content, particularly posts highlighting LGBTQ+ identities, support, or political issues. According to reports, LGBTQ+ posts, including those that simply celebrated pride or advocated for LGBTQ+ rights, were flagged and removed for reasons that some critics argue were vague or inconsistently applied. Many LGBTQ+ activists and users on Meta's platforms expressed concern that such actions stifled visibility and expression, potentially isolating LGBTQ+ individuals and communities, especially in spaces that were historically important for outreach and support. Lawsuits Numerous lawsuits have been filed against the company, both when it was known as Facebook, Inc., and as Meta Platforms. In March 2020, the Office of the Australian Information Commissioner (OAIC) sued Facebook, for significant and persistent infringements of the rule on privacy involving the Cambridge Analytica fiasco. Every violation of the Privacy Act is subject to a theoretical cumulative liability of $1.7 million. The OAIC estimated that a total of 311,127 Australians had been exposed. On December 8, 2020, the U.S. Federal Trade Commission and 46 states (excluding Alabama, Georgia, South Carolina, and South Dakota), the District of Columbia and the territory of Guam, launched Federal Trade Commission v. Facebook as an antitrust lawsuit against Facebook. The lawsuit concerns Facebook's acquisition of two competitors—Instagram and WhatsApp—and the ensuing monopolistic situation. FTC alleges that Facebook holds monopolistic power in the U.S. social networking market and seeks to force the company to divest from Instagram and WhatsApp to break up the conglomerate. William Kovacic, a former chairman of the Federal Trade Commission, argued the case will be difficult to win as it would require the government to create a counterfactual argument of an internet where the Facebook-WhatsApp-Instagram entity did not exist, and prove that harmed competition or consumers. In November 2025, it was ruled that Meta did not violate antitrust laws and holds no monopoly in the market. On December 24, 2021, a court in Russia fined Meta for $27 million after the company declined to remove unspecified banned content. The fine was reportedly tied to the company's annual revenue in the country. In May 2022, a lawsuit was filed in Kenya against Meta and its local outsourcing company Sama. Allegedly, Meta has poor working conditions in Kenya for workers moderating Facebook posts. According to the lawsuit, 260 screeners were declared redundant with confusing reasoning. The lawsuit seeks financial compensation and an order that outsourced moderators be given the same health benefits and pay scale as Meta employees. In June 2022, 8 lawsuits were filed across the U.S. over the allege that excessive exposure to platforms including Facebook and Instagram has led to attempted or actual suicides, eating disorders and sleeplessness, among other issues. The litigation follows a former Facebook employee's testimony in Congress that the company refused to take responsibility. The company noted that tools have been developed for parents to keep track of their children's activity on Instagram and set time limits, in addition to Meta's "Take a break" reminders. In addition, the company is providing resources specific to eating disorders as well as developing AI to prevent children under the age of 13 signing up for Facebook or Instagram. In June 2022, Meta settled a lawsuit with the US Department of Justice. The lawsuit, which was filed in 2019, alleged that the company enabled housing discrimination through targeted advertising, as it allowed homeowners and landlords to run housing ads excluding people based on sex, race, religion, and other characteristics. The U.S. Department of Justice stated that this was in violation of the Fair Housing Act. Meta was handed a penalty of $115,054 and given until December 31, 2022, to shadow the algorithm tool. In January 2023, Meta was fined €390 million for violations of the European Union General Data Protection Regulation. In May 2023, the European Data Protection Board fined Meta a record €1.2 billion for breaching European Union data privacy laws by transferring personal data of Facebook users to servers in the U.S. In July 2024, Meta agreed to pay the state of Texas US$1.4 billion to settle a lawsuit brought by Texas Attorney General Ken Paxton accusing the company of collecting users' biometric data without consent, setting a record for the largest privacy-related settlement ever obtained by a state attorney general. In October 2024, Meta Platforms faced lawsuits in Japan from 30 plaintiffs who claimed they were defrauded by fake investment ads on Facebook and Instagram, featuring false celebrity endorsements. The plaintiffs are seeking approximately $2.8 million in damages. In April 2025, the Kenyan High Court ruled that a US$2.4 billion lawsuit in which three plaintiffs claim that Facebook inflamed civil violence in Ethiopia in 2021 could proceed. In April 2025, Meta was fined €200 million ($230 million) for breaking the Digital Markets Act, by imposing a “consent or pay” system that forces users to either allow their personal data to be used to target advertisements, or pay a subscription fee for advertising-free versions of Facebook and Instagram. In late April 2025, a case was filed against Meta in Ghana over the alleged psychological distress experienced by content moderators employed to take down disturbing social media content including depictions of murders, extreme violence and child sexual abuse. Meta moved the moderation service to the Ghanaian capital of Accra after legal issues in the previous location Kenya. The new moderation company is Teleperformance, a multinational corporation with a history of worker's rights violation. Reports suggests the conditions are worse here than in the previous Kenyan location, with many workers afraid of speaking out due to fear of returning to conflict zones. Workers reported developing mental illnesses, attempted suicides, and low pay. In 26 January 2026, a New Mexico state court case was filed, suggesting that Mark Zuckerberg approved allowing minors to access artificial intelligence chatbot companions that safety staffers warned were capable of sexual interactions. In 2020, the company UReputation, which had been involved in several cases concerning the management of digital armies[clarification needed], filed a lawsuit against Facebook, accusing it of unlawfully transmitting personal data to third parties. Legal actions were initiated in Tunisia, France, and the United States. In 2025, the United States District court for the Northern District of Georgia approved a discovery procedure, allowing UReputation to access documents and evidence held by Meta. Structure Meta's key management consists of: As of October 2022[update], Meta had 83,553 employees worldwide. As of June 2024[update], Meta's board consisted of the following directors; Meta Platforms is mainly owned by institutional investors, who hold around 80% of all shares. Insiders control the majority of voting shares. The three largest individual investors in 2024 were Mark Zuckerberg, Sheryl Sandberg and Christopher K. Cox. The largest shareholders in late 2024/early 2025 were: Roger McNamee, an early Facebook investor and Zuckerberg's former mentor, said Facebook had "the most centralized decision-making structure I have ever encountered in a large company". Facebook co-founder Chris Hughes has stated that chief executive officer Mark Zuckerberg has too much power, that the company is now a monopoly, and that, as a result, it should be split into multiple smaller companies. In an op-ed in The New York Times, Hughes said he was concerned that Zuckerberg had surrounded himself with a team that did not challenge him, and that it is the U.S. government's job to hold him accountable and curb his "unchecked power". He also said that "Mark's power is unprecedented and un-American." Several U.S. politicians agreed with Hughes. European Union Commissioner for Competition Margrethe Vestager stated that splitting Facebook should be done only as "a remedy of the very last resort", and that it would not solve Facebook's underlying problems. Revenue Facebook ranked No. 34 in the 2020 Fortune 500 list of the largest United States corporations by revenue, with almost $86 billion in revenue most of it coming from advertising. One analysis of 2017 data determined that the company earned US$20.21 per user from advertising. According to New York, since its rebranding, Meta has reportedly lost $500 billion as a result of new privacy measures put in place by companies such as Apple and Google which prevents Meta from gathering users' data. In February 2015, Facebook announced it had reached two million active advertisers, with most of the gain coming from small businesses. An active advertiser was defined as an entity that had advertised on the Facebook platform in the last 28 days. In March 2016, Facebook announced it had reached three million active advertisers with more than 70% from outside the United States. Prices for advertising follow a variable pricing model based on auctioning ad placements, and potential engagement levels of the advertisement itself. Similar to other online advertising platforms like Google and Twitter, targeting of advertisements is one of the chief merits of digital advertising compared to traditional media. Marketing on Meta is employed through two methods based on the viewing habits, likes and shares, and purchasing data of the audience, namely targeted audiences and "look alike" audiences. The U.S. IRS challenged the valuation Facebook used when it transferred IP from the U.S. to Facebook Ireland (now Meta Platforms Ireland) in 2010 (which Facebook Ireland then revalued higher before charging out), as it was building its double Irish tax structure. The case is ongoing and Meta faces a potential fine of $3–5bn. The U.S. Tax Cuts and Jobs Act of 2017 changed Facebook's global tax calculations. Meta Platforms Ireland is subject to the U.S. GILTI tax of 10.5% on global intangible profits (i.e. Irish profits). On the basis that Meta Platforms Ireland Limited is paying some tax, the effective minimum US tax for Facebook Ireland will be circa 11%. In contrast, Meta Platforms Inc. would incur a special IP tax rate of 13.125% (the FDII rate) if its Irish business relocated to the U.S. Tax relief in the U.S. (21% vs. Irish at the GILTI rate) and accelerated capital expensing, would make this effective U.S. rate around 12%. The insignificance of the U.S./Irish tax difference was demonstrated when Facebook moved 1.5bn non-EU accounts to the U.S. to limit exposure to GDPR. Facilities Users outside of the U.S. and Canada contract with Meta's Irish subsidiary, Meta Platforms Ireland Limited (formerly Facebook Ireland Limited), allowing Meta to avoid US taxes for all users in Europe, Asia, Australia, Africa and South America. Meta is making use of the Double Irish arrangement which allows it to pay 2–3% corporation tax on all international revenue. In 2010, Facebook opened its fourth office, in Hyderabad, India, which houses online advertising and developer support teams and provides support to users and advertisers. In India, Meta is registered as Facebook India Online Services Pvt Ltd. It also has offices or planned sites in Chittagong, Bangladesh; Dublin, Ireland; and Austin, Texas, among other cities. Facebook opened its London headquarters in 2017 in Fitzrovia in central London. Facebook opened an office in Cambridge, Massachusetts in 2018. The offices were initially home to the "Connectivity Lab", a group focused on bringing Internet access to those who do not have access to the Internet. In April 2019, Facebook opened its Taiwan headquarters in Taipei. In March 2022, Meta opened new regional headquarters in Dubai. In September 2023, it was reported that Meta had paid £149m to British Land to break the lease on Triton Square London office. Meta reportedly had another 18 years left on its lease on the site. As of 2023, Facebook operated 21 data centers. It committed to purchase 100% renewable energy and to reduce its greenhouse gas emissions 75% by 2020. Its data center technologies include Fabric Aggregator, a distributed network system that accommodates larger regions and varied traffic patterns. Reception US Representative Alexandria Ocasio-Cortez responded in a tweet to Zuckerberg's announcement about Meta, saying: "Meta as in 'we are a cancer to democracy metastasizing into a global surveillance and propaganda machine for boosting authoritarian regimes and destroying civil society ... for profit!'" Ex-Facebook employee Frances Haugen and whistleblower behind the Facebook Papers responded to the rebranding efforts by expressing doubts about the company's ability to improve while led by Mark Zuckerberg, and urged the chief executive officer to resign. In November 2021, a video published by Inspired by Iceland went viral, in which a Zuckerberg look-alike promoted the Icelandverse, a place of "enhanced actual reality without silly looking headsets". In a December 2021 interview, SpaceX and Tesla chief executive officer Elon Musk said he could not see a compelling use-case for the VR-driven metaverse, adding: "I don't see someone strapping a frigging screen to their face all day." In January 2022, Louise Eccles of The Sunday Times logged into the metaverse with the intention of making a video guide. She wrote: Initially, my experience with the Oculus went well. I attended work meetings as an avatar and tried an exercise class set in the streets of Paris. The headset enabled me to feel the thrill of carving down mountains on a snowboard and the adrenaline rush of climbing a mountain without ropes. Yet switching to the social apps, where you mingle with strangers also using VR headsets, it was at times predatory and vile. Eccles described being sexually harassed by another user, as well as "accents from all over the world, American, Indian, English, Australian, using racist, sexist, homophobic and transphobic language". She also encountered users as young as 7 years old on the platform, despite Oculus headsets being intended for users over 13. See also References External links 37°29′06″N 122°08′54″W / 37.48500°N 122.14833°W / 37.48500; -122.14833 |
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Contents Late Middle Ages The late Middle Ages or late medieval period was the period of European history lasting from 1300 to 1500 AD. The late Middle Ages followed the High Middle Ages and preceded the onset of the early modern period (and in much of Europe, the Renaissance). Around 1350, centuries of prosperity and growth in Europe came to a halt. A series of famines and plagues, including the Great Famine of 1315–1317 and the Black Death, reduced the population to around half of what it had been before the calamities. Along with depopulation came social unrest and endemic warfare. France and England experienced serious peasant uprisings, such as the Jacquerie and the Peasants' Revolt, as well as over a century of intermittent conflict, the Hundred Years' War. To add to the many problems of the period, the unity of the Catholic Church was temporarily shattered by the Western Schism. Collectively, those events are sometimes called the crisis of the late Middle Ages. Despite the crises, the 14th century was also a time of great progress in the arts and sciences. Following a renewed interest in ancient Greek and Roman texts that took root in the High Middle Ages, the Italian Renaissance began. The absorption of Latin texts had started before the Renaissance of the 12th century through contact with Arabs during the Crusades, but the availability of important Greek texts accelerated with the fall of Constantinople to the Ottoman Turks, when many Byzantine scholars had to seek refuge in the West, particularly Italy. Combined with this influx of classical ideas was the invention of printing, which facilitated the dissemination of the printed word and democratized learning. These two developments would later contribute to the Reformation. Toward the end of the period, the Age of Discovery began. The expansion of the Ottoman Empire cut off trading possibilities with the East. Europeans were forced to seek new trading routes, leading to the Spanish expedition under Christopher Columbus to the Americas in 1492 and Vasco da Gama's voyage to Africa and India in 1498. Their discoveries strengthened the economy and power of European nations. The changes brought about by these developments have led many scholars to view this period as the end of the Middle Ages and the beginning of modern history and of early modern Europe. However, the division is somewhat artificial, since ancient learning was never entirely absent from European society. As a result, there was developmental continuity between the ancient age (via classical antiquity) and the modern age. Some historians, particularly in Italy, prefer not to speak of the late Middle Ages at all; rather, they see the high period of the Middle Ages transitioning to the Renaissance and the modern era. Historiography and periodization The term "late Middle Ages" refers to one of the three periods of the Middle Ages, along with the early Middle Ages and the High Middle Ages. Leonardo Bruni was the first historian to use the tripartite periodization in his History of the Florentine People (1442). Flavio Biondo used a similar framework in Decades of History from the Deterioration of the Roman Empire (1439–1453). The tripartite periodization became standard after the German historian Christoph Cellarius published Universal History Divided into an Ancient, Medieval, and New Period (1683).[citation needed] For 18th-century historians studying the 14th and 15th centuries, the central theme was the Renaissance, with its rediscovery of ancient learning and the emergence of an individual spirit. The heart of this rediscovery lies in Italy, where, in the words of Jacob Burckhardt, "Man became a spiritual individual and recognized himself as such." This proposition was later challenged, and it was argued that the 12th century was a period of greater cultural achievement. As economic and demographic methods were applied to the study of history, the trend was increasingly to see the late Middle Ages as a period of recession and crisis. Belgian historian Henri Pirenne continued the subdivision of Early, High, and late Middle Ages in the years around World War I. Yet it was his Dutch colleague, Johan Huizinga, who was primarily responsible for popularising the pessimistic view of the late Middle Ages, with his book The Autumn of the Middle Ages (1919). To Huizinga, whose research focused on France and the Low Countries rather than Italy, despair and decline were the main themes, not rebirth. Modern historiography on the period has reached a consensus between the two extremes of innovation and crisis. It is now generally acknowledged that conditions were vastly different north and south of the Alps, and the term "late Middle Ages" is often avoided entirely within Italian historiography. The term "Renaissance" is still considered useful for describing certain intellectual, cultural, or artistic developments but not as the defining feature of an entire European historical epoch. The period from the early 14th century up until – and sometimes including – the 16th century is rather seen as characterized by other trends: demographic and economic decline followed by recovery, the end of Western religious unity and the subsequent emergence of the nation-state, and the expansion of European influence onto the rest of the world. History The limits of Christian Europe were still being defined in the 14th and 15th centuries. While the Grand Duchy of Moscow was beginning to repel the Mongols, and the Iberian kingdoms were completing the Reconquista of the peninsula and turning their attention outward, the Balkans fell under the dominance of the Ottoman Empire.[a] Meanwhile, the remaining nations of the continent were locked in almost constant international or internal conflict. The situation gradually led to the consolidation of central authority and the emergence of the nation state. The financial demands of war necessitated higher levels of taxation, resulting in the emergence of representative bodies – most notably the English Parliament. The growth of secular authority was further aided by the decline of the papacy with the Western Schism and the coming of the Protestant Reformation. After the failed union of Sweden and Norway of 1319–1365, the pan-Scandinavian Kalmar Union, that also included Denmark, was instituted in 1397. The Swedes were reluctant members of the union from the start. In an attempt to subdue the Swedes, King Christian II of Denmark had large numbers of the Swedish aristocracy killed in the Stockholm Bloodbath of 1520. Yet this measure only led to further hostilities, and Sweden broke away for good in 1523. Norway, on the other hand, became an inferior party of the union and remained united with Denmark until 1814. Iceland benefited from its relative isolation and was the last Scandinavian country to be struck by the Black Death. Meanwhile, the Norse colony in Greenland died out, probably under extreme weather conditions in the 15th century. These conditions might have been the effect of the Little Ice Age. The death of Alexander III of Scotland in 1286 threw the country into a succession crisis, and the English king, Edward I, was brought in to arbitrate. Edward claimed overlordship over Scotland, leading to the Wars of Scottish Independence. The English were eventually defeated, and the Scots were able to develop a stronger state under the Stewarts. From 1337, England's attention was largely directed towards France in the Hundred Years' War. Henry V's victory at the Battle of Agincourt in 1415 briefly paved the way for a unification of the two kingdoms, but his son Henry VI soon squandered all previous gains. The loss of France led to discontent at home. Soon after the end of the war in 1453, the dynastic struggles of the Wars of the Roses (c. 1455–1485) began, involving the rival dynasties of the House of Lancaster and House of York. The war ended in the accession of Henry VII of the House of Tudor, who continued the work started by the Yorkist kings of building a strong, centralized monarchy. While England's attention was thus directed elsewhere, the Hiberno-Norman lords in Ireland were becoming gradually more assimilated into Irish society, and the island was allowed to develop virtual independence under English overlordship. The French House of Valois, which followed the House of Capet in 1328, was at its outset marginalized in its own country, first by the English invading forces of the Hundred Years' War and later by the powerful Duchy of Burgundy. The emergence of Joan of Arc as a military leader changed the course of war in favour of the French, and the initiative was carried further by King Louis XI. Meanwhile, Charles the Bold, Duke of Burgundy, met resistance in his attempts to consolidate his possessions, particularly from the Swiss Confederation formed in 1291. When Charles was killed in the Burgundian Wars at the Battle of Nancy in 1477, the Duchy of Burgundy was reclaimed by France. At the same time, the County of Burgundy and the wealthy Burgundian Netherlands came into the Holy Roman Empire under Habsburg control, setting up conflict for centuries to come. Bohemia prospered in the 14th century, and the Golden Bull of 1356 made the king of Bohemia the first among the imperial electors, but the Hussite revolution threw the country into crisis. The Holy Roman Empire passed to the House of Habsburg in 1438, where it remained until its dissolution in 1806. Yet in spite of the extensive territories held by the Habsburgs, the Empire itself remained fragmented, and much real power and influence lay with the individual principalities. In addition, financial institutions, such as the Hanseatic League and the Fugger family, held great power, on both economic and political levels. The Kingdom of Hungary experienced a golden age during the 14th century. In particular the reigns of the Angevin kings Charles Robert (1308–42) and his son Louis the Great (1342–82) were marked by success. The country grew wealthy as the main European supplier of gold and silver. Louis the Great led successful campaigns from Lithuania to Southern Italy, and from Poland to Northern Greece. He had the greatest military potential of the 14th century with his enormous armies (often over 100,000 men). Meanwhile, Poland's attention was turned eastwards, as its Commonwealth with Lithuania created an enormous entity in the region. The union, and the conversion of Lithuania, also marked the end of paganism in Europe. Louis did not leave a son as heir after his death in 1382. Instead, he named as his heir the young prince Sigismund of Luxemburg. The Hungarian nobility did not accept his claim, and the result was an internal war. Sigismund eventually achieved total control of Hungary and established his court in Buda and Visegrád. Both palaces were rebuilt and improved, and were considered the richest of the time in Europe. Inheriting the throne of Bohemia and the Holy Roman Empire, Sigismund continued conducting his politics from Hungary, but he was kept busy fighting the Hussites and the Ottoman Empire, which was becoming a menace to Europe in the beginning of the 15th century. King Matthias Corvinus of Hungary led the largest army of mercenaries of the time, the Black Army of Hungary, which he used to conquer Moravia and Austria and to fight the Ottoman Empire. After Italy, Hungary was the first European country where the Renaissance appeared. However, the glory of the Kingdom ended in the early 16th century, when the King Louis II of Hungary was killed in the Battle of Mohács in 1526 against the Ottoman Empire. Hungary then fell into a serious crisis and was invaded, ending its significance in central Europe during the medieval era. The state of Kievan Rus' fell during the 13th century in the Mongol invasion. The Grand Duchy of Moscow rose in power thereafter, winning a great victory against the Golden Horde at the Battle of Kulikovo in 1380. The victory did not end Tartar rule in the region, however, and its immediate beneficiary was the Grand Duchy of Lithuania, which extended its influence eastwards. Under the reign of Ivan the Great (1462–1505), Moscow became a major regional power, and the annexation of the vast Republic of Novgorod in 1478 laid the foundations for a Russian national state. After the Fall of Constantinople in 1453, the Russian princes started to see themselves as the heirs of the Byzantine Empire. They eventually took on the imperial title of Tzar, and Moscow was described as the Third Rome. The Byzantine Empire had for a long time dominated the eastern Mediterranean in politics and culture. By the 14th century, however, it had almost entirely collapsed into a tributary state of the Ottoman Empire, centered on the city of Constantinople and a few enclaves in Greece. With the Fall of Constantinople in 1453, the Byzantine Empire was permanently extinguished. The Bulgarian Empire was in decline by the 14th century, and the ascendancy of Serbia was marked by the Serbian victory over the Bulgarians in the Battle of Velbazhd in 1330. By 1346, the Serbian king Stefan Dušan had been proclaimed emperor. Yet Serbian dominance was short-lived; the Serbian army led by the Lazar Hrebeljanovic was defeated by the Ottoman Army at the Battle of Kosovo in 1389, where most of the Serbian nobility was killed and the south of the country came under Ottoman occupation, as much of southern Bulgaria had become Ottoman territory in the Battle of Maritsa 1371. Northern remnants of Bulgaria were finally conquered by 1396, Serbia fell in 1459, Bosnia in 1463, and Albania was finally subordinated in 1479 only a few years after the death of Skanderbeg. Belgrade, a Hungarian domain at the time, was the last large Balkan city to fall under Ottoman rule, in the siege of Belgrade of 1521. By the end of the medieval period, the entire Balkan peninsula was annexed by, or became vassal to, the Ottomans. Avignon was the seat of the papacy from 1309 to 1376. With the return of the Pope to Rome in 1378, the Papal State developed into a major secular power, culminating in the morally corrupt papacy of Alexander VI. Florence grew to prominence amongst the Italian city-states through financial business, and the dominant Medici family became important promoters of the Renaissance through their patronage of the arts. Other city-states in northern Italy also expanded their territories and consolidated their power, primarily Milan, Venice, and Genoa. The War of the Sicilian Vespers had by the early 14th century divided southern Italy into an Aragon Kingdom of Sicily and an Anjou Kingdom of Naples. In 1442, the two kingdoms were effectively united under Aragonese control. The 1469 marriage of Isabella I of Castile and Ferdinand II of Aragon and the 1479 death of John II of Aragon led to the creation of modern-day Spain. In 1492, Granada was captured from the Moors, thereby completing the Reconquista. Portugal had during the 15th century – particularly under Henry the Navigator – gradually explored the coast of Africa, and in 1498, Vasco da Gama found the sea route to India. The Spanish monarchs met the Portuguese challenge by financing the expedition of Christopher Columbus to find a western sea route to India, leading to the discovery of the Americas in 1492. Late medieval European society Around 1300–1350, the Medieval Warm Period gave way to the Little Ice Age. The colder climate resulted in agricultural crises, the first of which is known as the Great Famine of 1315–1317. The demographic consequences of this famine, however, were not as severe as the plagues that occurred later in the century, particularly the Black Death. Estimates of the death rate caused by this epidemic range from one third to as much as sixty percent. By around 1420, the accumulated effect of recurring plagues and famines had reduced the population of Europe to perhaps no more than a third of what it was a century earlier. The effects of natural disasters were exacerbated by armed conflicts; this was particularly the case in France during the Hundred Years' War. It took 150 years for the European population to regain similar levels to 1300. As the European population was severely reduced, land became more plentiful for the survivors, and labour was consequently more expensive. Attempts by landowners to forcibly reduce wages, such as the English 1351 Statute of Laborers, were doomed to fail. These efforts resulted in nothing more than fostering resentment among the peasantry, leading to rebellions such as the French Jacquerie in 1358 and the English Peasants' Revolt in 1381. The long-term effect was the virtual end of serfdom in Western Europe. In Eastern Europe, on the other hand, landowners were able to exploit the situation to force the peasantry into even more repressive bondage. The upheavals caused by the Black Death left certain minority groups particularly vulnerable, especially the Jews, who were often blamed for the calamities. Anti-Jewish pogroms were carried out all over Europe; in February 1349, two thousand Jews were murdered in Strasbourg. States were also guilty of discrimination against the Jews. Monarchs gave in to the demands of the people, and the Jews were expelled from England in 1290, from France in 1306, from Spain in 1492, and from Portugal in 1497. While the Jews were suffering persecution, one group that probably experienced increased empowerment in the late Middle Ages was women. The great social changes of the period opened up new possibilities for women in the fields of commerce, learning, and religion. Yet at the same time, women were also vulnerable to incrimination and persecution, as belief in witchcraft increased. The accumulation of social, environmental, and health-related problems also led to an increase in interpersonal violence in most parts of Europe. Population increase, religious intolerance, famine, and disease led to an increase in violent acts in vast parts of medieval society. One exception to this was North-Eastern Europe, whose population managed to maintain low levels of violence due to a more organized society resulting from extensive and successful trade. Up until the mid-14th century, Europe had experienced steadily increasing urbanization. Cities were also decimated by the Black Death, but the role of urban areas as centres of learning, commerce, and government ensured continued growth. By 1500, Venice, Milan, Naples, Paris, and Constantinople each probably had more than 100,000 inhabitants. Twenty-two other cities were larger than 40,000; most of these were in Italy and the Iberian peninsula, but there were also some in France, the Empire, and the Low Countries, as well as London in England. Military history Through battles such as Courtrai (1302), Bannockburn (1314), and Morgarten (1315), it became clear to the great territorial princes of Europe that the military advantage of the feudal cavalry was lost and that a well equipped infantry was preferable. Through the Welsh Wars, the English became acquainted with, and adopted, the highly efficient longbow. Once properly managed, this weapon gave them a great advantage over the French in the Hundred Years' War. The introduction of gunpowder affected the conduct of war significantly. Though employed by the English as early as the Battle of Crécy in 1346, firearms initially had little effect in the field of battle. It was through the use of cannons as siege weapons that major change was brought about; the new methods would eventually change the architectural structure of fortifications. Changes also took place within the recruitment and composition of armies. The use of the national or feudal levy was gradually replaced by paid troops of domestic retinues or foreign mercenaries. The practice was associated with Edward III of England and the condottieri of the Italian city-states. All over Europe, Swiss mercenaries were in particularly high demand. At the same time, the period also saw the emergence of the first permanent armies. It was in Valois France, under the heavy demands of the Hundred Years' War, that the armed forces gradually assumed a permanent nature. Parallel to the military developments emerged also a constantly more elaborate chivalric code of conduct for the warrior class. This newfound ethos can be seen as a response to the diminishing military role of the aristocracy, and it gradually became almost entirely detached from its military origin. The spirit of chivalry was given expression through the new (secular) type of chivalric orders; the first of these was the Order of St. George, founded by Charles I of Hungary in 1325, while the best known was probably the English Order of the Garter, founded by Edward III in 1348. Christian conflict and reform The French crown's increasing dominance over the Papacy culminated in the transference of the Holy See to Avignon in 1309. When the Pope returned to Rome in 1377, this led to the election of different popes in Avignon and Rome, resulting in the Western Schism (1378–1417). The Schism divided Europe along political lines; while France, her ally Scotland, and the Spanish kingdoms supported the Avignon Papacy, France's enemy England stood behind the pope in Rome, together with Portugal, Scandinavia, and most of the German princes. At the Council of Constance (1414–1418), the Papacy was once more united in Rome. Even though the unity of the Western Church was to last for another hundred years, and though the Papacy was to experience greater material prosperity than ever before, the Great Schism had done irreparable damage. The internal struggles within the Church had impaired her claim to universal rule and promoted anti-clericalism among the people and their rulers, paving the way for reform movements. Though many of the events were outside the traditional time period of the Middle Ages, the end of the unity of the Western Church (the Protestant Reformation) was one of the distinguishing characteristics of the medieval period. The Catholic Church had long fought against heretic movements, but during the late Middle Ages, it started to experience demands for reform from within. The first of these came from Oxford professor John Wycliffe in England. Wycliffe held that the Bible should be the only authority in religious questions, and he spoke out against transubstantiation, celibacy, and indulgences. In spite of influential supporters among the English aristocracy, such as John of Gaunt, the movement was not allowed to survive. Though Wycliffe himself was left unmolested, his supporters, the Lollards, were eventually suppressed in England. The marriage of Richard II of England to Anne of Bohemia established contacts between the two nations and brought Lollard ideas to her homeland. The teachings of the Czech priest Jan Hus were based on those of John Wycliffe, yet his followers, the Hussites, were to have a much greater political impact than the Lollards. Hus gained a great following in Bohemia, and in 1414, he was requested to appear at the Council of Constance to defend his cause. When he was burned as a heretic in 1415, it caused a popular uprising in the Czech lands. The subsequent Hussite Wars fell apart due to internal quarrels and did not result in religious or national independence for the Czechs, but both the Catholic Church and the German element within the country were weakened. Martin Luther, a German monk, started the German Reformation by posting 95 theses on the castle church of Wittenberg on October 31, 1517. The immediate provocation spurring this act was Pope Leo X's renewal of the indulgence for the building of the new St. Peter's Basilica in 1514. Luther was challenged to recant his heresy at the Diet of Worms in 1521. When he refused, he was placed under the ban of the Empire by Charles V. Receiving the protection of Frederick the Wise, he was then able to translate the Bible into German. To many secular rulers, the Protestant Reformation was a welcome opportunity to expand their wealth and influence. The Catholic Church met the challenges of the reforming movements with what has been called the Catholic Reformation, or Counter-Reformation. Europe became split into northern Protestant and southern Catholic parts, resulting in the Religious Wars of the 16th and 17th centuries. Trade and commerce The increasingly dominant position of the Ottoman Empire in the eastern Mediterranean presented an impediment to trade for the Christian nations of the west, who in turn started looking for alternatives. Portuguese and Spanish explorers found new trade routes – south of Africa to India, as well as across the Atlantic Ocean to America. As Genoese and Venetian merchants opened up direct sea routes with Flanders, the Champagne fairs lost much of their importance. At the same time, English wool export shifted from raw wool to processed cloth, resulting in losses for the cloth manufacturers of the Low Countries. In the Baltic and North Sea, the Hanseatic League reached the peak of their power in the 14th century but started going into decline in the fifteenth. In the late 13th and early 14th centuries, a process took place – primarily in Italy but partly also in the Empire – that historians have termed a "commercial revolution". Among the innovations of the period were new forms of partnership and the issuing of insurance, both of which contributed to reducing the risk of commercial ventures; the bill of exchange and other forms of credit that circumvented the canonical laws for gentiles against usury and eliminated the dangers of carrying bullion; and new forms of accounting, in particular double-entry bookkeeping, which allowed for better oversight and accuracy. With the financial expansion, trading rights became more jealously guarded by the commercial elite. Towns saw the growing power of guilds, while on a national level, special companies would be granted monopolies on particular trades, like the English wool Staple. The beneficiaries of these developments would accumulate immense wealth. Families like the Fuggers in Germany, the Medicis in Italy, and the de la Poles in England and individuals like Jacques Cœur in France would help finance the wars of kings, achieving great political influence in the process. Though there is no doubt that the demographic crisis of the 14th century caused a dramatic fall in production and commerce in absolute terms, there has been a vigorous historical debate over whether the decline was greater than the fall in population. While the older orthodoxy held that the artistic output of the Renaissance was a result of greater opulence, more recent studies have suggested that there might have been a so-called "depression of the Renaissance". In spite of convincing arguments for the case, the statistical evidence is simply too incomplete for a definite conclusion to be made. Arts and sciences In the 14th century, the predominant academic trend of scholasticism was challenged by the humanist movement. Though primarily an attempt to revitalise the classical languages, the movement also led to innovations within the fields of science, art, and literature, helped by impulses from Byzantine scholars who had to seek refuge in the West after the Fall of Constantinople in 1453. In science, classical authorities like Aristotle were challenged for the first time since antiquity. Within the arts, humanism took the form of the Renaissance. Though the 15th-century Renaissance was a highly localised phenomenon – limited mostly to the city-states of northern Italy – artistic developments were taking place also further north, particularly in the Netherlands.[a] The predominant school of thought in the 13th century was the Thomistic reconciliation of the teachings of Aristotle with Christian theology. The Condemnation of 1277, enacted at the University of Paris, placed restrictions on ideas that could be interpreted as heretical, restrictions that had implication for Aristotelian thought. An alternative was presented by William of Ockham, following the manner of the earlier Franciscan John Duns Scotus, who insisted that the world of reason and the world of faith had to be kept apart. Ockham introduced the principle of parsimony – or Occam's razor – whereby a simple theory is preferred to a more complex one and speculation on unobservable phenomena is avoided. This maxim is, however, often misquoted. Occam was referring to his nominalism in this quotation. Essentially saying the theory of absolutes, or metaphysical realism, was unnecessary to make sense of the world. This new approach liberated scientific speculation from the dogmatic restraints of Aristotelian science and paved the way for new approaches. Particularly within the field of theories of motion, great advances were made, when such scholars as Jean Buridan, Nicole Oresme, and the Oxford Calculators challenged the work of Aristotle. Buridan developed the theory of impetus as the cause of the motion of projectiles, which was an important step towards the modern concept of inertia. The works of these scholars anticipated the heliocentric worldview of Nicolaus Copernicus. Certain technological inventions of the period – whether of Arab or Chinese origin or unique European innovations – were to have great influence on political and social developments, in particular gunpowder, the printing press, and the compass. The introduction of gunpowder to the field of battle not only affected military organisation but also helped advance the nation-state. Gutenberg's movable type printing press made possible not only the Reformation but also a dissemination of knowledge that would lead to a gradually more egalitarian society. The compass, along with other innovations such as the cross-staff, the mariner's astrolabe, and advances in shipbuilding, enabled the navigation of the World Oceans and the early phases of colonialism. Other inventions had a greater impact on everyday life, such as eyeglasses and the weight-driven clock. A precursor to Renaissance art can be seen already in the early 14th-century works of Giotto. Giotto was the first painter since antiquity to attempt the representation of three-dimensional reality and endow his characters with true human emotions. The most important developments, however, came in 15th-century Florence. The affluence of the merchant class allowed extensive patronage of the arts, and foremost among the patrons were the Medici. The period saw several important technical innovations, like the principle of linear perspective found in the work of Masaccio and later described by Brunelleschi. Greater realism was also achieved through the scientific study of anatomy, championed by artists like Donatello. This can be seen particularly well in his sculptures, inspired by the study of classical models. As the centre of the movement shifted to Rome, the period culminated in the High Renaissance masters da Vinci, Michelangelo, and Raphael. The ideas of the Italian Renaissance were slow to cross the Alps into northern Europe, but important artistic innovations were made also in the Low Countries. Though not – as previously believed – the inventor of oil painting, Jan van Eyck was a champion of the new medium and used it to create works of great realism and minute detail. The two cultures influenced each other and learned from each other, but painting in the Netherlands remained more focused on textures and surfaces than the idealized compositions of Italy. In northern European countries, Gothic architecture remained the norm, and the Gothic cathedral was further elaborated. In Italy, on the other hand, architecture took a different direction, also here inspired by classical ideals. The crowning work of the period was the Santa Maria del Fiore in Florence, with Giotto's clock tower, Ghiberti's baptistery gates, and Brunelleschi's cathedral dome of unprecedented proportions. The most important development of late medieval literature was the ascendancy of the vernacular languages. The vernacular had been in use in England since the 8th century and France since the 11th century, where the most popular genres had been the chanson de geste, troubadour lyrics, and romantic epics, or the romance. Though Italy was later in evolving a native literature in the vernacular language, it was here that the most important developments of the period were to come. Dante Alighieri's Divine Comedy, written in the early 14th century, merged a medieval worldview with classical ideals. Another promoter of the Italian language was Boccaccio with his Decameron. The application of the vernacular did not entail a rejection of Latin, and both Dante and Boccaccio wrote prolifically in Latin as well as Italian, as would Petrarch later (whose Canzoniere also promoted the vernacular and whose contents are considered the first modern lyric poems). Together, the three poets established the Tuscan dialect as the norm for the modern Italian language. The new literary style spread rapidly and in France, influenced such writers as Eustache Deschamps and Guillaume de Machaut. In England, Geoffrey Chaucer helped establish Middle English as a literary language with his Canterbury Tales, which contained a wide variety of narrators and stories (including some translated from Boccaccio). The spread of vernacular literature eventually reached as far as Bohemia and the Baltic, Slavic, and Byzantine worlds. Music was an important part of both secular and spiritual culture, and in the universities, it made up part of the quadrivium of the liberal arts. From the early 13th century, the dominant sacred musical form had been the motet, a composition with text in several parts. From the 1330s and onwards emerged the polyphonic style, which was a more complex fusion of independent voices. Polyphony had been common in the secular music of the Provençal troubadours. Many of these had fallen victim to the 13th-century Albigensian Crusade, but their influence reached the papal court at Avignon. The main representatives of the new style, often referred to as ars nova as opposed to ars antiqua, were the composers Philippe de Vitry and Guillaume de Machaut. In Italy, where the Provençal troubadours had also found refuge, the corresponding period goes under the name of trecento, and the leading composers were Giovanni da Cascia, Jacopo da Bologna, and Francesco Landini. A prominent reformer of Orthodox Church music from the first half of the 14th century was John Kukuzelis; he also introduced a system of notation widely used in the Balkans in the following centuries. In the British Isles, plays were produced in some 127 different towns during the Middle Ages. These vernacular Mystery plays were written in cycles of a large number of plays: York (48 plays), Chester (24), Wakefield (32), and Unknown (42). A larger number of plays survive from France and Germany in this period, and some type of religious drama was performed in nearly every European country in the late Middle Ages. Many of these plays contained comedy, devils, villains, and clowns. Morality plays emerged as a distinct dramatic form around 1400 and flourished until 1550, an example being The Castle of Perseverance, which depicts mankind's progress from birth to death. Another famous morality play is Everyman. Everyman receives Death's summons, struggles to escape, and finally resigns himself to necessity. Along the way, he is deserted by Kindred, Goods, and Fellowship – only Good Deeds goes with him to the grave. At the end of the late Middle Ages, professional actors began to appear in England and Europe. Richard III and Henry VII both maintained small companies of professional actors. Their plays were performed in the Great Hall of a nobleman's residence, often with a raised platform at one end for the audience and a "screen" at the other for the actors. Also important were Mummers' plays, performed during the Christmas season, and court masques. These masques were especially popular during the reign of Henry VIII who had a House of Revels built and an Office of Revels established in 1545. The end of medieval drama came about due to a number of factors, including the weakening power of the Catholic Church, the Protestant Reformation, and the banning of religious plays in many countries. Elizabeth I forbid all religious plays in 1558, and the great cycle plays had been silenced by the 1580s. Similarly, religious plays were banned in the Netherlands in 1539, the Papal States in 1547, and Paris in 1548. The abandonment of these plays destroyed the international theatre that had thereto existed and forced each country to develop its own form of drama. It also allowed dramatists to turn to secular subjects and the reviving interest in Greek and Roman theatre provided them with the perfect opportunity. After the end of the late Middle Ages period, the Renaissance spread unevenly over continental Europe from the southern European region. The intellectual transformation of the Renaissance is viewed as a bridge between the Middle Ages and the Modern era. Europeans would later begin an era of world discovery. Combined with the influx of classical ideas was the invention of printing which facilitated dissemination of the printed word and democratized learning. These two things would lead to the Protestant Reformation. Europeans also discovered new trading routes, as was the case with Columbus' travel to the Americas in 1492, and Vasco da Gama's circumnavigation of Africa and India in 1498. Their discoveries strengthened the economy and power of European nations. Ottomans and Europe By the end of the 15th century, the Ottoman Empire had advanced all over Southeast Europe, eventually conquering the Byzantine Empire and extending control over the Balkan states. Hungary was the last bastion of the Latin Christian world in the East, and fought to keep its rule over a period of two centuries. After the death of the young king Vladislaus I of Hungary during the Battle of Varna in 1444 against the Ottomans, the Kingdom was placed in the hands of Count John Hunyadi, who became Hungary's regent-governor (1446–1453). Hunyadi was considered one of the most relevant military figures of the 15th century: Pope Pius II awarded him the title of Athleta Christi, or Champion of Christ, for being the only hope of resisting the Ottomans from advancing to Central and Western Europe. Hunyadi succeeded during the siege of Belgrade in 1456 against the Ottomans, the biggest victory against that empire in decades. This battle became a real crusade against the Muslims, as the peasants were motivated by the Franciscan friar Saint John of Capistrano, who came from Italy predicating him holy war. The effect that it created in that time was one of the main factors that helped in achieving the victory. However the premature death of the Hungarian lord left Pannonia defenseless and in chaos. In an extremely unusual event for the Middle Ages, Hunyadi's son, Matthias, was elected as king of Hungary by the Hungarian nobility. For the first time, a member of an aristocratic family (and not from a royal family) was crowned. King Matthias Corvinus of Hungary (1458–1490) was one of the most prominent figures of the period, directing campaigns to the West, conquering Bohemia in answer to the pope's call for help against the Hussite Protestants. Also, in resolving political hostilities with the German emperor Frederick III of Habsburg, he invaded his western domains. Matthew organized the Black Army of mercenary soldiers; it was considered as the biggest army of its time. Using this powerful tool, the Hungarian king led wars against the Turkish armies and stopped the Ottomans during his reign. After the death of Matthew, and with end of the Black Army, the Ottoman Empire grew in strength and Central Europe was defenseless. At the Battle of Mohács, the forces of the Ottoman Empire annihilated the Hungarian army and Louis II of Hungary drowned in the Csele Creek while trying to escape. The leader of the Hungarian army, Pál Tomori, also died in the battle. This is considered to be one of the final battles of medieval times. Timeline Dates are approximate, consult particular articles for details Middle Ages themes Other themes 14th century Lithuania defeats Golden Horde. Principality of Kiev becomes part of the Grand Duchy of Lithuania 15th century Gallery See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Special:BookSources/978-0-8133-8221-0] | [TOKENS: 380] |
Contents Book sources This page allows users to search multiple sources for a book given a 10- or 13-digit International Standard Book Number. Spaces and dashes in the ISBN do not matter. This page links to catalogs of libraries, booksellers, and other book sources where you will be able to search for the book by its International Standard Book Number (ISBN). Online text Google Books and other retail sources below may be helpful if you want to verify citations in Wikipedia articles, because they often let you search an online version of the book for specific words or phrases, or you can browse through the book (although for copyright reasons the entire book is usually not available). At the Open Library (part of the Internet Archive) you can borrow and read entire books online. Online databases Subscription eBook databases Libraries Alabama Alaska California Colorado Connecticut Delaware Florida Georgia Illinois Indiana Iowa Kansas Kentucky Massachusetts Michigan Minnesota Missouri Nebraska New Jersey New Mexico New York North Carolina Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Washington state Wisconsin Bookselling and swapping Find your book on a site that compiles results from other online sites: These sites allow you to search the catalogs of many individual booksellers: Non-English book sources If the book you are looking for is in a language other than English, you might find it helpful to look at the equivalent pages on other Wikipedias, linked below – they are more likely to have sources appropriate for that language. Find other editions The WorldCat xISBN tool for finding other editions is no longer available. However, there is often a "view all editions" link on the results page from an ISBN search. Google books often lists other editions of a book and related books under the "about this book" link. You can convert between 10 and 13 digit ISBNs with these tools: Find on Wikipedia See also Get free access to research! Research tools and services Outreach Get involved |
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