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Contents Lara Croft Lara Croft is a character and the main protagonist of the video game franchise Tomb Raider. She is presented as a highly intelligent and athletic English adventurer and archaeologist who ventures into ancient tombs and hazardous ruins around the world. Created by a team at British developer Core Design that included Toby Gard, the character first appeared in the video game Tomb Raider in 1996. Core Design handled the initial development of the character and the series. Inspired by strong female icons, Gard designed Lara Croft to counter stereotypical female characters. The company modified the character for subsequent titles, which included graphical improvements and gameplay additions. American developer Crystal Dynamics took over the series after the 2003 sequel Tomb Raider: The Angel of Darkness was received poorly. The new developer rebooted the character along with the video game series by altering her physical proportions and giving her additional ways of interacting with game environments. Lara Croft has further appeared in video game spin-offs, printed adaptations, a series of animated short films, feature films, and merchandise related to the series. The promotion of the character includes a brand of apparel and accessories, action figures, and model portrayals. She has been licensed for third-party promotion, including television and print advertisements, music-related appearances, and as a spokesmodel. Critics consider Lara Croft a significant video game character in popular culture. She holds six Guinness World Records, has a strong fan following, and is among the first video game characters to be successfully adapted to film. Lara Croft is also considered a sex symbol, one of the earliest in the industry to achieve widespread attention. The character's influence in the industry has been a point of contention among critics; viewpoints range from a positive agent of change in video games to a negative role model for young girls. Characteristics Lara Croft is depicted as an athletic woman with brown eyes and dark auburn hair, frequently kept in a plait or ponytail. The character's classic costume is a turquoise leotard, light brown shorts, calf-high boots, and tall white socks. Accessories include fingerless gloves, a backpack, a utility belt with holsters on either side, and two pistols. The video game sequels introduced new outfits designed for different environments, such as underwater and cold weather. In the later games, Croft wears a crop top, camouflage pants and black or light brown shorts. When exploring, she often carries two pistols, but has used other weaponry throughout the series. She is fluent in several languages. Lara's backstory has changed dramatically over the course of the series. During the first era, beginning in Tomb Raider (1996), game manuals describe the character as the Wimbledon, London-born daughter of Lord Henshingly Croft (Lord Richard Croft in Legend and Survivor timelines). She was raised as a British aristocrat and betrothed to the fictitious Earl of Faringdon. Lara attended the Scottish boarding school Gordonstoun and a Swiss finishing school. At the age of twenty-one, she survived a plane crash, which left her stranded in the Himalayas for two weeks; the experience spurred her to shun her former life and seek other adventures around the world. Croft published books and other written works based on her exploits as a mercenary, big-game hunter, and master thief. These provided her with a replacement source of income after her father disowned her over her change in lifestyle. During the second era, which began with Tomb Raider: Legend (2006), Lara's story was changed to be the daughter of archaeologist Lord Richard Croft, the Earl of Abingdon, and someone who was quickly identified as a highly talented individual while attending the Abingdon Girls School. The plane crash was changed to when Lara was nine years old, and with her mother, Amelia Croft. While searching for shelter, Lara and her mother took refuge in an ancient Nepalese temple, where Lara witnesses her mother vanish after tampering with an ancient sword. Her father later disappears in search of his wife. This spurs Lara on to seek the reason for her mother's disappearance. The third era, established in Tomb Raider (2013), deviates from the original plot considerably. When Lara was young she travelled with her parents on many of their archaeological expeditions which helped to shape the woman she was becoming. It was on one of these expeditions that her mother, Amelia Croft, vanished and was presumed dead and when her father Richard presumably took his own life a few years later, she was then left in the care of Conrad Roth. Even though she inherited a vast fortune, giving her the means to attend Cambridge with ease, Lara chose to study at University College London. Though this was a much tougher choice, it helped her become more grounded and level-headed than she might otherwise have been. She also ended up meeting her best friend, Samantha Nishimura, during her time at UCL. It was because of Sam's free spirit and a wild streak that Lara was able to experience much more of London than just the universities and museums that she loved so much. After travelling the world, both Lara and Sam end up on an expedition to the Dragon's Triangle off the Japanese coast in search of the lost civilization of Yamatai. It is on this expedition that Lara is stranded on a remote island full of natural, human and supernatural dangers, which enables her to develop from an untested young woman to a survivor. After experiencing the supernatural powers of the ancient world, she comes to realise her father was right about his theories and her hunger for adventure awakens. Character development history Core Design, a subsidiary of Eidos,[e] created Lara Croft as the lead protagonist of its video game Tomb Raider, which began development in 1994. Lead graphic artist Toby Gard went through about five designs before arriving at the character's final appearance. He initially envisioned a male lead character with a whip and a hat. Core Design co-founder Jeremy Smith characterised Gard's initial design as derivative of Indiana Jones and asked for more originality. Gard decided that a female character would work better from a design standpoint. He also cited Virtua Fighter as an influence; Gard noticed that while watching people play the game, players selected one of the two available female characters in the game almost every match he saw. Gard expressed a desire to counter stereotypical female characters, which he has characterised as "bimbos" or "dominatrix" types. Smith was sceptical of a female lead at first because few contemporary games featured them. He came to regard a female lead as a great hook and put faith in Gard's idea. Inspired by pop artist Neneh Cherry and comic book character Tank Girl, Gard experimented with different designs, including "sociopathic blonds, muscle women, flat topped hip-hopsters and a Nazi-like militant in a baseball cap". He settled on a tough South American Latina woman with a braid named Laura Cruz. Tomb Raider co-creator Paul Douglas changed her given name after consulting a baby names book, "Lara had a more interesting derivation than Laura so we chose that. Lara is from the same derivation as Larisa. Which is derived from Larissa in Greece. Which means “citadel”. I thought that would be apt for her personality—enigmatic and guarded." Her surname was changed by scriptwriter Vicky Arnold later in development, "Cruz was changed to Croft quite a bit later in the project by Vicky. That came out of the Derby phonebook. Cruz was Spanish/Portuguese for Cross and it wasn’t too far from Cross to Croft. We must have stuck with the Cruz surname for a while as we got into the rut of referring to her as just Lara. In the first game design doc, dated December 1994, Laura is already changed to Lara but even in the final game design documents there are still places where Cruz hadn't yet changed to Croft." Along with the name change, the character's backstory was altered to incorporate a British origin. Gard was keen to animate the character realistically, an aspect he felt the industry at the time had disregarded. He sacrificed quick animations in favour of more fluid movement, believing that players would empathise with the character more easily. Lara's dual-wielding of pistols was inspired by the film Hard Boiled and an Æon Flux short. In the first Tomb Raider, Croft's three-dimensional (3D) character model is made of around 230 polygons. The character's braid was removed from the model, but added back for subsequent iterations. Gavin Rummery, programmer on the first two Tomb Raider games, explained: "It had been dropped from the original because it just didn't work properly with all the acrobatic moves—it was more like she had an electric eel attached to her head that had a life of its own. But on TRII I came up with a way to get it working and was really pleased how natural it looked". Although widely reported that, while adjusting the character model, Gard accidentally increased the breasts' dimensions by 150 percent and the rest of the creative team argued to keep the change, Gard has stated that the notion "came out of a silly remark made in an interview". Core Design hired Shelley Blond to voice Croft after the game entered the beta phase of development. Gard left Core Design after completing Tomb Raider, citing a lack of creative freedom and control over marketing decisions related to the ideas he developed (especially Lara Croft). Victor Interactive Software asked Core Design to redesign Lara with a larger head and eyes to appeal to a Japanese audience. Illustrations drawn by Hiromasa Ota and a render of the design were faxed through late into development. Gard did not want to alter Lara's appearance; as a compromise, the design was used only in the Japanese manuals and guide.[f] Core Design improved and modified the character with each installment. Developers for Tomb Raider II increased the number of polygons in the character's model and added more realistic curves to its design. Other changes included new outfits and manoeuvres. Core Design reportedly planned to implement crawling as a new gameplay option, but the option did not appear until Tomb Raider III. Actress Judith Gibbins took over voice acting responsibilities and stayed on through the third game. For Tomb Raider III, the developers increased the number of polygons in Croft's 3D model to about 300, and introduced more abilities to the gameplay. Core Design wanted to reintroduce the character to players in Tomb Raider: The Last Revelation and included a flashback scenario with a younger Lara. The developers expanded the character's set of moves threefold to allow more interaction with the environment, like swinging on ropes and kicking open doors. The character model was altered to feature more realistic proportions, and Jonell Elliott replaced Gibbins as the voice of Lara Croft. By the time development for The Last Revelation began, Core Design had worked on the series constantly for four years and the staff felt they had exhausted their creativeness. Feeling the series lacked innovation, Core Design decided to kill the character and depicted Croft trapped by a cave-in during the final scenes of the game. The next title, Tomb Raider Chronicles, depicted the late Lara Croft via her friends' flashbacks. The game introduced stealth attacks, which would carry over to the next game, Tomb Raider: The Angel of Darkness. While the original development team worked on Chronicles, Core Design assigned a new team to develop The Angel of Darkness for the PlayStation 2. Anticipating innovative changes from next-generation consoles, Adrian Smith—co-founder of Core Design—wanted to reinvent the character to keep pace with the updated technology. Core Design conducted market research, including fan polls, to aid in The Angel of Darkness' development. The development team felt it could not alter the character and instead opted to place her in a situation different from previous games. The PlayStation 2 hardware allowed for more manoeuvres and a more detailed character model; the number of polygons in Croft's model increased to 4,400. The team sought to add more melee manoeuvres to better match Lara Croft's portrayal as an expert fighter in her backstory. Movement control was switched from the directional pad to the analogue control stick to provide more precision. After the original team finished Chronicles, it joined the development of The Angel of Darkness. Excess content, missed production deadlines, and Eidos' desire to time the game's launch to coincide with the release of the 2003 Tomb Raider film resulted in what was criticized as a poorly designed game; Croft was brought back to life without explanation and the character controls lacked precision. The Angel of Darkness was received poorly, prompting Eidos—fearing financial troubles[g] from another unsuccessful game—to give development duties for future titles to Crystal Dynamics, another Eidos subsidiary. The Legacy of Kain development team began work on a new title (Tomb Raider: Legend), which would essentially reboot the franchise, significantly changing her origin story, with Toby Gard returning to work as a consultant. The development team reassessed the brand value of the franchise and its protagonist. Chip Blundell, Eidos's vice-president of brand management, commented that the designers understood that fans saw the character and brand as their own, rather than Eidos's. With that in mind, the team retooled the franchise and character to emphasise aspects of the original game that made them unique. The storyline intended for a trilogy of games that started with The Angel of Darkness was abandoned and a new plot was created for Legend. Crystal Dynamics focused on believability rather than realism to re-develop the character, posing decisions around the question, "What could Lara do?", and giving her action more freedom. The designers updated Lara Croft's move set to make her movements appear more fluid and continuous. The animations were also updated so the character could better interact with environmental objects. The developers introduced a feature that causes the character's skin and clothing to appear wet after swimming and dirty after rolling on the ground. Responding to criticism directed at the character controls in The Angel of Darkness, Crystal Dynamics redesigned the character's control scheme to provide what it felt was the best third-person action experience. The developers also introduced close-quarter melee manoeuvres. Crystal Dynamics updated the character model to add more realism, but retained past design elements. The polygon count increased to over 9,800. More attention was paid to the character's lip synching and facial expressions to allow for dynamic emotional responses to in-game events. In redesigning the character's appearance, Crystal Dynamics updated Croft's hairstyle, wardrobe, and accessories. Her shirt was changed to a V-neck crop top, her body was given more muscle tone, and her hair braid was switched to a ponytail. The voice actor for Lara Croft was initially rumoured to be Rachel Weisz, but the role was eventually given to Keeley Hawes. Crystal Dynamics retained the design changes for the next game, Tomb Raider: Anniversary, a remake of the first game. The designers aimed to portray Croft with more emotional depth, and focused on the character's desire to achieve the end goal of the game, culminating in killing one of the antagonists. The developers used the death to evoke guilt in Croft afterward and illustrate that shooting a person should be a difficult choice. Tomb Raider: Underworld continued the plot line established in Legend. Crystal Dynamics used new technology to improve the character for seventh-generation consoles, focusing on improving realism. The dirt accumulation and water cleansing mechanic from Legend was altered to be a real-time mechanic that can involve the entire game environment. To achieve a more natural appearance, the developers added spherical harmonics to provide indirect lighting to in-game objects like Lara Croft. Crystal Dynamics made the character model more complex and detailed than previous instalments, featuring more texture layers that determine the appearance of shadows and reflective light on it, and using skeletal animation to portray believable movement. The number of polygons in the model increased to 32,000. The developers enhanced Croft's facial model by increasing the number of polygons, bones used in the animation skeleton, and graphical shaders in the face to add more detail and expressive capabilities. The hair was created as a real-time cloth simulation to further add realism to its shape and movement. The developers kept Croft's hair tied back because they felt a real person would not want it flying around while performing dangerous manoeuvres. The character's body size was increased and breast size reduced to portray more realistic proportions. The developers tried to redefine Lara Croft's actions by questioning what they felt the character was capable of. While previous games used hand-animated movement for the character, Underworld introduced motion capture-based animation to display more fluid, realistic movement and facial expressions. Stuntwoman and Olympic Gold medalist Heidi Moneymaker was the motion capture actress, and advised the designers on practical movements. Animators adjusted and blended the recorded animation to create seamless transitions between the separate moves and their simultaneous combinations. The blends and additional animations give the character more flexible movement. Actions were overlapped to allow for multitasking, such as aiming at two separate targets and shooting with one hand while the other holds an object collected from the environment. Other additions include more melee attacks, as well as contextual offensive and climbing manoeuvres. Crystal Dynamics sought to make the visual appearance of the Xbox 360 and PlayStation 3 versions identical, although the systems used different techniques to achieve this. In response to Underworld's lackluster sales figures, Eidos reportedly considered altering the character's appearance to appeal more to female fans. "After crafting the biography, our goal was to make her as believable and relatable as possible. We wanted to make a girl that felt familiar, but still has a special quality about her. Something about the way her eyes look and the expression on her face makes you want to care for her. That was our number one goal. We wanted to have empathy for Lara, and at the same time show the inner strength that made clear she was going to become a hero". Japanese game company Square Enix acquired Eidos in April 2009, restructuring Eidos into Square Enix Europe. Crystal Dynamics remained as developer of the Tomb Raider games. Lara Croft and the Guardian of Light introduced cooperative gameplay to the series, a move that brand director Karl Stewart said was meant to "show [Lara] as a more humanistic character" by placing her in a situation that differed from previous instalments. The game uses the same technology featured in the studio's past Tomb Raider games. Despite the changes implemented in the titles, Crystal Dynamics believed that the series required further reinvention to stay relevant. In late 2010, Square Enix announced a franchise reboot titled Tomb Raider; the new Lara Croft would be a darker, grittier reimagining of the character. In examining the character, Crystal Dynamics concluded that Croft's largest failing was her "Teflon coating", and that it needed a more human version that players would care about. The studio sought a new voice actress, trialling dozens of relatively unknown performers. The second reboot focuses on the origin of the character, and as a result, changes the previous back story. Staff opted to first work on the character's biography rather than cosmetic aspects. Crystal Dynamics sought to avoid the embellished physique of past renditions and pushed for realistic proportions. In redesigning the character's appearance, the designers began with simple concepts and added features that it felt made Lara Croft iconic: a ponytail, "M-shaped" lips, and the spatial relationship between her eyes, mouth, and nose. The company also changed the character's wardrobe, focusing on what it believed was more functional and practical. In designing the outfits, staff aimed to create a look that was "relevant" and "youthful", but not too "trendy" or "hip". To gauge the redesign, Crystal Dynamics conducted eye tracking studies on subjects who viewed the new version and previous ones. Camilla Luddington voiced Lara Croft in the reboot. Similar to Underworld, the new Tomb Raider features motion capture-based animation. In an effort to present realism and emotion in the character, Crystal Dynamics captured face and voice performances to accompany the body performances. The company revamped Croft's in-game combat abilities. Crystal Dynamics aimed to make the "combat fresh to the franchise, competitive amongst [similar games], and relevant to the story". Among the changes is the implementation of a free aiming system. The studio reasoned that such a system would cause players to be more invested in the action by fostering a "raw, brutal, and desperate" style. Global brand director Karl Stewart stated that such desperation relates to the updated character's inexperience with violence. He further commented that Lara Croft is thrust into a situation where she is forced to kill, which will be a traumatic and defining moment for her. Appearances Lara Croft primarily appears in the Tomb Raider video game series published by Square Enix Europe (previously Eidos Interactive). The action-adventure games feature the protagonist travelling the world in search of rare objects and mystical artefacts. Croft first appeared in the 1996 video game Tomb Raider, in which she competes against a rival archaeologist in search of an Atlantean artefact. Tomb Raider II (1997) centres on the search for the Dagger of Xian, which is sought by thieves. Tomb Raider III (1998) focuses on meteorite fragments that endow humans with supernatural powers. In Tomb Raider: The Last Revelation (1999), the first depiction of a young Croft, she is accompanied by her mentor, Werner Von Croy. Lara searches for artefacts associated with the Egyptian god Horus, and later encounters Von Croy as an antagonist. In Tomb Raider: Chronicles (2000), most of the game relates adventures told via flashbacks. The first portable game, Tomb Raider (2000), was released on the Game Boy Color, and follows the character's search for the Nightmare Stone. A second Game Boy Color title, Tomb Raider: Curse of the Sword (2001), sees Lara Croft facing off against a cult. The next portable game, Tomb Raider: The Prophecy (2002), was released on the Game Boy Advance, and focuses on three magical stones. Tomb Raider: The Angel of Darkness (2003) was released on home platforms, centring on the murder of Professor Von Croy. Eidos rebooted the series with Tomb Raider: Legend (2006), which focuses on Lara Croft's search for Excalibur and her mother, altering the character's backstory as part of the redesign. Tomb Raider: Anniversary (2007), a remake of the first game in the series, carried over design elements from Legend. Tomb Raider: Underworld (2008) continues the plot introduced in Legend. The story centres on Croft's search for information about her mother's disappearance. In the process she learns of the existence of Thor's hammer, Mjölnir. Lara Croft and the Guardian of Light (2010) is a downloadable game that is set in a Central American jungle, and features an ancient warrior who works with Lara Croft. In 2013, the series was rebooted a second time with the game Tomb Raider, which retold the story of Lara's origins and began a new continuity. Its sequel Rise of the Tomb Raider was released in 2015, and the third game, Shadow of the Tomb Raider, in 2018. Outside of Tomb Raider. Lara Croft also appears as a Diana DLC crossover skin in the fighting game Brawlhalla. Additionally, Croft makes a cameo appearance in the PlayStation 5 game Astro's Playroom. Lara Croft appears in Fortnite Battle Royale's sixth season of the second chapter and was featured in a "Team Up!" mode with Aloy from Horizon Zero Dawn. Fortnite later added a separate Angel of Darkness-styled skin in 2025. Lara Croft also made an appearance in Call of Duty: Modern Warfare II's Season 5 Reloaded update. Lara Croft appears as a playable character in Hero Wars: Alliance and Hero Wars: Dominion Era as part of a special time-limited event. In July 2024, Croft was added as a playable character in the online horror game Dead by Daylight with the release of the Tomb Raider DLC. Paramount Pictures acquired the film rights for Tomb Raider in 1998, and released Lara Croft: Tomb Raider in 2001. Producer Lloyd Levin stated that the filmmakers tried to capture the essence of the video game elements rather than duplicate them. Acknowledging the character's "huge fan base" and recognisable appearance, director Simon West sought an actress with acting ability as well as physical attributes similar to Croft. Paramount also received input from developer Core Design on casting. Rumoured actresses included Pamela Anderson, Demi Moore and Jeri Ryan. Academy Award-winning actress Angelina Jolie was eventually cast to play Lara Croft. She had not been a fan of the character, but considered the role as a "big responsibility", citing anxiety about fans' high expectations. Producer Lawrence Gordon felt she was a perfect fit for the role. Jolie braided her hair and used minimal padding to increase her bust a cup size to 36D for the role. She felt that Croft's video game proportions were unrealistic, and wanted to avoid showing such proportions to young girls. Jolie trained rigorously for the action scenes required for the role, occasionally sustaining injuries. Her training focused on practising the physical skills necessary to perform the film's stunts. The difficulty of the training and injuries discouraged her, but she continued working through production. Jolie also encountered difficulties when working the guns, bungee jumping, and maneuvering with the braid. West had not anticipated that Jolie would do her own stunts, and was impressed, as was stunt coordinator Simon Crane, by the effort she put into them. Angelina Jolie reprised her role for a sequel, Lara Croft: Tomb Raider – The Cradle of Life. Directed by Jan de Bont, the 2003 film focused more on the character's development. De Bont praised Jolie's understanding of Lara Croft, as well as the character's strength, saying he "hates women in distress". Producer Levin commented that the film staff tried to handle the character properly, and consulted with the video game developers on what would be appropriate. Despite the second film's poor reception, Paramount remained open to releasing a third. Jolie was still optioned to play the character in a third film as late as 2007, though she had commented in 2004 that she had no intention of reprising the role again. Development for a third film was announced in 2009, with Dan Lin as the producer. Lin intended to reboot the film series with a young Croft in an origin story. In 2011, Olivia Wilde denied rumours that she would play the role, but still expressed interest. The film, originally meant for a 2013 release, was to be produced by Graham King, written by Marti Noxon and produced by Metro-Goldwyn-Mayer in partnership with King's studio GK Films. Alicia Vikander was cast in 2016 to play Lara in the next film adaptation. Tomb Raider, directed by Roar Uthaug, was released in 2018 and takes inspiration mostly from the rebooted series that started in 2013. A sequel was in development, but was cancelled in July 2022 after MGM lost the film rights to the franchise due to its expiration. Beginning in 1997, the character regularly appeared in comics by Top Cow Productions. Lara Croft first appeared in a crossover in Sara Pezzini's Witchblade, and later starred in her own comic book series in 1999. The series began with Dan Jurgens as the writer, featuring artwork by Andy Park and Jon Sibal. The stories were unrelated to the video games until issue 32 of the Tomb Raider series, which adapted Angel of Darkness's plot. The series ran for 50 issues in addition to special issues. Other printed adaptations are Lara Croft Tomb Raider: The Amulet of Power, a 2003 novel written by Mike Resnick; Lara Croft Tomb Raider: The Lost Cult, a 2004 novel written by E. E. Knight; and Lara Croft Tomb Raider: The Man of Bronze, a 2005 novel written by James Alan Gardner. GameTap released Revisioned: Tomb Raider in 2007 via the GameTap TV section of its website. The web series is a collection of ten short animated films that features re-imagined versions of Croft by well-known animators, comic book artists, and writers, including Jim Lee, Warren Ellis, and Peter Chung. Episodes ranged from five to seven and half minutes in length, featuring Minnie Driver as Croft. The creative staff was given considerable freedom to re-interpret the character; they did not consult the video game designers, but were given a guide listing acceptable and unacceptable practices. Hayley Atwell voices Lara in the Netflix animated series, Tomb Raider: The Legend of Lara Croft. Promotion and merchandising Eidos's German branch and the KMF agency handled marketing for Lara Croft. According to Eidos, no focus groups or scientific studies were consulted when devising the marketing strategy for the character. Eidos marketing manager David Burton oversaw marketing efforts, which attempted to portray the character as attractive and pleasant. However, interaction with the press, especially those in Europe, resulted in less clothing depicted in promotional images. Concerned with diluting Croft's personality, Eidos avoided products it felt did not fit the character. Ian Livingstone, Eidos's product acquisition director, commented that the company declines most merchandising proposals. He stated that Eidos primarily focused on game development and viewed such promotion outside video games as exposure for the character. Following Square Enix's acquisition, Eidos's marketing duties were transferred to the Square Enix Europe subsidiary. As part of the second reboot, Crystal Dynamics planned to align all products, promotions, and media ventures with its new version of the character. Lara Croft has appeared on the cover of multiple video game magazines. The character has also been featured on the cover of non-video game publications such as British style magazine The Face, American news magazines Time and Newsweek, German magazine Focus, and the front page of British newspaper the Financial Times. By April 2025, she had made over 2,300 cover appearances, earning a Guinness World Records for the "most magazine covers for a video game character". Eidos licensed the character for third party advertisements, including television ads for Visa, Lucozade drinks, G4 TV, Brigitte magazine, and SEAT cars (Seat Ibiza, Seat Cordoba, Seat Alhambra and Seat Arosa). Retro Gamer staff attributes Croft's "iconic" status in part to the Lucozade commercials, calling them one of the most memorable advertisements to use video game elements. Picture advertisements appeared on the sides of double-decker buses and walls of subway stations. Irish rock band U2 commissioned custom renders for video footage displayed on stage in its 1997 PopMart tour. German punk band Die Ärzte's 1998 music video for "Men are Pigs" (German: "Männer sind Schweine") also features Croft. Music groups have dedicated songs to the character, culminating in the release of the album A Tribute to Lara Croft. Bands and artists including Depeche Mode, Moby, Faith No More, Jimi Tenor, and Apollo 440 donated their songs for the album. In conjunction with the release of the 2001 film adaptation, Eidos licensed Lara Croft free-of-charge to the Gordonstoun boarding school for a commercial. The school approached Eidos about use of the character. Eidos allowed the one-time licence due to Core Design's inclusion of Gordonstoun in Croft's fictional biography without the school's permission. Near the end of 2006, Lara Croft became the spokesmodel for the Skin Cancer Awareness Foundation of Minden, Nevada as part of its Sun Smart Teen Program. The foundation felt that the character personified the benefits of a healthy body, and that young teenagers could relate to Croft. Lara Croft's likeness has been a model for merchandise. The first action figures were produced by Toy Biz, based on the video game version of the character. Playmates Toys released a series of action figures that depict Croft in different outfits and accessories from the video games, later producing figures modelled after Jolie for Lara Croft: Tomb Raider. Graphic designer Marc Klinnert of Studio OXMOX released 1⁄6-scale model kits of the character, and later built a full-scale version. Arcade: The Videogame Magazine and PlayStation Magazine promoted life-size Croft statues as contest prizes. Spurred by a rumour that Eidos provided Lara Croft autographs, fans wrote to the company to obtain them. The quantity prompted Eidos to quickly produce autographed cards to meet demand. Tomb Raider: Underworld themes and wallpapers featuring the character were released for the PlayStation 3. Xbox Live Marketplace released Xbox 360 avatars in conjunction with Lara Croft and the Guardian of Light. Eidos released a brand of Lara Croft apparel and accessories, marketed under the label "LARA". The line included wallets, watches, bathrobes, and Zippo lighters. Other third-party apparel are hiking boots, backpacks, leather jackets, and thermoses. Croft's likeness has also appeared on French postage stamps, PlayStation memory cards, and trading cards as part of a collectible card game. In October 1997, Eidos held an art exhibition titled "Lara Goes Art" in Hamburg, Germany to promote Tomb Raider II. The exhibit featured selected artwork of the character submitted by artists and fans. Pieces included oil and airbrushed paintings, photo comics, and Klinnert's model; SZM Studios provided the computer-generated footage it had created for Die Ärzte's music video and the Brigitte magazine television commercial. Eidos hired several models to portray Lara Croft at publicity events, promotions, trade shows, and photo shoots. Initially Eidos employed four models to dress as Lara for a photo call at a trade event, but after witnessing the unusually large crowd the models drew, they decided to expand the concept by casting a single official Lara who would role-play the character. Nathalie Cook was the first model to assume the role individually, portraying the character from 1996 to 1997. Cook was followed by British actress Rhona Mitra from 1997 to 1998. Eidos then updated the Croft costume to match its video game depiction. Core Design said they restricted Mitra's dialogue as the character, only allowing her to answer questions in-character if Core had reviewed the questions ahead of time and scripted answers. French model Vanessa Demouy succeeded Mitra for a brief time until fashion model Nell McAndrew took over the role at the 1998 Electronic Entertainment Expo. McAndrew was selected from around 150 women who auditioned for the role. Afterward, the model was surprised she was picked despite auditioning with a shaved head at the time. McAndrew portrayed Croft from 1998 until 1999, when Eidos fired her for posing in Playboy, which used the character and Tomb Raider franchise to promote the McAndrew's issue without Eidos's approval. Core Design was granted an injunction against the magazine to protect the character's image; Playboy was ordered to place stickers on the cover of the issue to conceal the reference to Tomb Raider. Eidos later donated McAndrew's Tomb Raider costume to a UNICEF charity auction. Lara Weller followed McAndrew from 1999 to 2000. Subsequent models were Lucy Clarkson from 2000 to 2002 and Jill de Jong, who wore a costume based on Lara Croft's new appearance in Angel of Darkness from 2002 to 2004. Karima Adebibe became the model from 2006 to 2008, and wore a costume based on the updated version of Croft in Legend. She was the first model Eidos allowed to portray Lara Croft outside posing for photography. To prepare for the role, Adebibe trained in areas the character was expected to excel in like combat, motorcycling, elocution, and conduct. Gymnast Alison Carroll succeeded Adebibe in 2008 and featured apparel based on the character's appearance in Underworld. Similar to Adebibe, Carroll received special training—Special Air Service (SAS) survival, weapons, and archaeology—to fill the role. Crystal Dynamics discontinued the use of models as part of the franchise's second reboot. The number of models prompted Guinness World Records to award the character an official record for the "most official real life stand-ins" in 2008. Reception and legacy Lara Croft's introduction was widely regarded as an innovation in the video game market,[h] with Rob Smith of PlayStation: The Official Magazine describing her as a video game icon of that generation of games. IGN credited a rise in PlayStation sales in part to Croft's debut on the system, and PlayStation Magazine attributed the first title's success to the character. Official U.S. PlayStation Magazine stated alternatively that Tomb Raider's PlayStation success propelled the character to prominence, making her a mascot for the system. PlayStation Magazine credits coverage in the Financial Times in 1997 as the starting point of the character's mainstream attention. Jeremy Smith commented that the Financial Times is "a very serious, sober, broadsheet newspaper, and hardly the place you might expect Lara to be 'discovered'. But Eidos had announced its latest financial results, which were great results, and so the Financial Times had decided to put Eidos on the front page. They'd been given some Eidos information and artwork, and they decided to use Lara to illustrate their news piece". He further said that Eidos had not actively courted Lara's early magazine cover appearances or otherwise actively promoted the character at the time. As years progressed, Lara Croft's popularity declined due to a string of poorly received video game sequels. The Angel of Darkness is often cited as the character's low point. IGN editor Colin Moriarty stated that while she began as an intelligent and strong female character, her games grew bland and Lara Croft became more like a "virtual blow-up doll". Crystal Dynamics' rendition of Croft in Legend garnered wide, though not universal, praise; many publications described the portrayal as a successful reboot. Game Informer named Lara Croft the number six top video game hero of 2006, citing the character's successful reprise in popularity. The magazine cited the character's alterations in Legend as the reason for her resurgent success. Chris Slate of PlayStation Magazine lauded the character changes in Legend, commenting that "Lara is finally back". He praised Eidos's decision to switch developers and Crystal Dynamics' contributions, especially the character's new gameplay manoeuvres and updated appearance. Others, such as Schedeen and GamePro's Patrick Shaw, felt that the makeover did not improve the character. Fans also disapproved of the changes, especially the switch from the braid. Dr. Mark Griffiths of Nottingham Trent University described Lara Croft as a psychological tabula rasa. Richard Rouse of Midway Games attributed the character's appeal to a loosely defined personality, which permits players to imprint their own onto her. Jeremy Smith stated that the minimal personality allows players to form a relationship with the character, and that rather than taking on the role of the character they were sharing the game's experience with her. Burton added that Croft is perceived differently around the world. French demographics focus on her sex appeal, while German and British audiences are drawn to her aggressiveness and aloofness, respectively. Fansites dedicated to Lara Croft appeared on the internet in several languages after the release of Tomb Raider, and contained official and fan-created images of Croft, model photographs, and fan fiction starring the character. More than 100 such sites were present by the end of 1998. By 2000, search engine HotBot yielded around 4,700 pages for a search of the character's name. Admirers discussed rumours related to Lara Croft via usenet newsgroups and ICQ chats. Enthusiasts collected merchandise and paraphernalia, submitted fan art to video game magazines, participated in Croft cosplay, and obtained tattoos depicting the character. One admirer rode a bike over 500 miles (800 km) from Amsterdam to Derby wearing Lara Croft-brand clothing to meet the developers, who welcomed him after learning of the trip. Lara Croft holds a Guinness World Record as the "most recognized female video game character", and received a star on the Walk of Game in San Francisco. Magazines, including Guinness World Records Gamer's Edition, have also described her as one of the iconic and best female video game character of all time.[i] Game Informer commented that the character is well liked around the world, particularly in England. Official U.S. PlayStation Magazine described Croft as "one of today's premier videogame and movie heroes", and Play magazine described her as "3D gaming's first female superstar". Hartas called Croft one of the most famous game women, praising her independence. Karen Jones of Official U.S. PlayStation Magazine described the character as "one of the biggest stars on the PlayStation". In 1998, PlayStation Magazine commented that Lara Croft was one of the most memorable characters on the PlayStation console, and echoed a similar statement in 2004. Time magazine writer Chris Taylor called her "the foundation of one of the most successful franchises in video-game history". Guinness World Records named the character the best-selling video game heroine, following the Tomb Raider franchise surpassing 100 million units sold, in November 2025. Lara Croft has become a sex symbol for video games, despite Toby Gard's intentions for her to be sexy "only because of her power". Time magazine's Kristina Dell considered her the first sex symbol of video games. Schedeen stated that Croft is among the first video game icons to be accepted as a mainstream sex symbol. Robert Ashley of Official U.S. PlayStation Magazine described Lara Croft as the first video game character openly thought of as sexy, and attributed the appearance of similar 3D characters to her. Several publications listed big breasts as one of the character's most famous attributes.[j] After interviewing players in 1998, Griffiths commented that players regularly mention Croft's breasts when discussing her. In 2008, the character was first and second on two UGO Networks lists of hottest video game characters. GameDaily placed Lara Croft number one on a similar list that same year, and PlayStation: The Official Magazine awarded her honourable mention for Game Babe of the Year. Croft has appeared in several issues of Play's Girls of Gaming special and PlayStation Magazine's Swimsuit special.[k] Layouts portray the character partially nude, in bikinis, and in revealing cocktail dresses, though Tomb Raider: Underworld's creative director Eric Lindstrom criticised such poses as out of character. He further stated that they conflict with Croft's popular strengths, and felt that fans respond more strongly to images of the character dressed more conservatively than to ones with provocative poses. PlayStation Magazine's staff agreed, commenting that better use of the character's sex appeal would please fans more. Male players have performed in-game actions to make Lara Croft repeatedly say phrases and view closer camera angles of her bust, while pornography featuring the character has been distributed via the internet.[l] After the first game's release, rumours appeared on the internet about a cheat code to remove the character's clothes. Despite Core Design's denial of such a code, the rumour persisted, fuelled by manipulated nude images. While the developers were annoyed by the rumour, Eidos management viewed it as good publicity and internally recommended including it when new games were being developed. The rumour lingered by the time Legend was released. PlayStation Magazine featured an April Fool's parody of Croft and the rumoured code referred to as "Nude Raider." Fans developed software patches to remove Lara Croft's clothing in the personal computer game releases. "It was a defining moment for me as I watched her strut seductively across my screen and into the sex symbol status that would turn the gaming world on its head. Fast-forward eight years through the evolution of next-gen hardware, multimillion-dollar budgets, and massive acceptance of games in pop culture. Still, Lara Croft continues to personify an ongoing culture clash over gender, sexuality, empowerment, and objectification". Reactions from groups have been mixed. The journal Leonardo noted some feminists' negative reaction to her design; though males were identifying with their feminine side through Croft, she reinforced unrealistic ideals about the female body. Australian feminist scholar Germaine Greer criticised her as an embodiment of male fantasies. In 1996, Electronic Gaming Monthly argued that rather than altering the state of women in games, Croft simply continued the trend of female characters in video games being large-breasted and scantily clad in an effort to appeal to the predominately male gaming audience, which had the overall impact of teaching gamers to see women as sex objects. PlayStation Magazine staff commented that Croft could be seen as either a role model for young independent girls or the embodiment of a male adolescent fantasy, though they later stated that the character does little to attract female demographics and was obviously designed with a male audience in mind. The magazine's editors also criticised Core Design's hypocritical attempts to downplay the character's sex appeal in public statements while releasing advertisements that prominently featured Lara Croft's sexuality. Graphic artist Heather Gibson attributed the "sexism" to participation from Eidos's marketing department. Author Mark Cohen attributed Lara Croft's eroticism among male fans to the character's appearance and a male protective instinct. German psychologist Oscar Holzberg described the protective behaviour as the result of the opportunity to act as a hero in virtual worlds and a fear of powerful, emancipated women. Jonathan Smith of Arcade: The Videogame Magazine similarly noted that male players often see themselves as "chivalrous protectors" while playing the game. Holzberg further stated that the lower psychological investment inherent to virtual characters is more comfortable for males. Cohen affirmed that despite blatant male appeal, Croft garnered a serious female audience. Eidos estimated that by 2000 female consumers comprised 20–25 percent of Tomb Raider game purchases. Jeremy Smith argued that the series attracted more female players to video gaming, especially in Japan. Smith believed that Croft does not alienate prospective female players, representing an emancipated heroine and not simply an attractive character. According to Adrian Smith, the character was also popular with younger demographics that did not view her sexually. Cohen reasoned that Croft differs from other erotic characters and attractive leads, as the Tomb Raider games also feature rich action, impressive graphics, and intelligent puzzles; other such characters were unsuccessful because the game content was lacking. Amy Hennig of developer Naughty Dog and Griffiths echoed similar statements. GamesRadar editor Justin Towell nonetheless commented that he couldn't imagine a Tomb Raider game without a sexualised female lead. Griffith described Lara Croft as a flawed female influence. He stated that though the character is a step in the right direction, too many women view her as a "crudely realised male fantasy figure". Women in the video game industry describe the character as both a positive and negative influence. Ismini Roby of WomenGamers.com commented that Croft was not a sexist influence in 1996, attributed to the lack of prominent female characters in video games at the time. She stated that the over-sexualized appearance was overlooked because the character was a "breath of fresh air", but Roby felt that though Lara Croft's proportions have become more realistic, the character's personality was diluted by the developer's actions to appeal to a male audience. LesbianGamers.com's Tracy Whitelaw called the character a dichotomy, stating that though Croft is viewed as "idealized" with an "unattainable body", the character was a great stride for the propagation of female characters as video game protagonists. Lara Croft's 1996 debut is often cited as a catalyst for more female leads in video games. Kaiser Hwang of PlayStation Magazine commented that she "brought girl power" to video games. IGN argued that Croft helped redefine gender in video games by providing a different interpretation of what women could do. Several publications have used her as the standard to which later female video game characters have been compared. Multiple video game publications have labelled the character a video game and cultural icon.[m] The title character in the 1998 German film Run Lola Run has often been compared to Croft.[n] Comparisons were also made to Bond girl Christmas Jones from the 1999 James Bond series film The World Is Not Enough. Additionally, both Eidos Interactive senior executive John Davis and character spokeswoman Susie Hamilton noted the character's similarities to Lara Croft. Jeremy Smith credits Croft with exposing the Tomb Raider games and video games in general to a wider audience. Computer and Video Games commented that Croft's appearance on the cover of The Face signalled a change in the perception of video games from "geeky" to mainstream. The character is honoured in the English city Derby, previous home to Core Design. In 2007, Radleigh Homes placed a blue plaque for Croft at the site of Core Design's former offices, now a block of flats. The Derby City Council opened a public vote in 2009 to name its new ring road. The winning choice, with 89% of over 27,000 votes, was "Lara Croft Way", which later opened in July 2010. In 2020, Croft appeared on four commemorative UK postage stamps issued by the Royal Mail to celebrate classic UK video games. A 2024 poll conducted by BAFTA with around 4,000 respondents named Lara Croft as the most iconic video-game character of all time. Yahoo! Movies and IGN credit Jolie's role in the first Tomb Raider film with significantly raising her profile and propelling her to international super-stardom, respectively. Jolie commented that young children would ask her to sign objects as Lara Croft. After filming for the first movie at the Cambodian temple Ta Prohm, the local inhabitants called it the "Angelina Jolie Temple" and local restaurants served Jolie's favourite alcoholic beverage advertised as "Tomb Raider cocktails". IGN's Jesse Schedeen described Croft as one of few characters to receive a decent videogame-to-movie adaptation. By 2008, the first Tomb Raider film was the highest-grossing video game film and the largest opening ever for a movie headlined by a woman. It became the second highest-grossing video game movie in 2010, after the release of Prince of Persia: The Sands of Time, with Lara Croft Tomb Raider: The Cradle of Life as the fourth. See also Notes References Further reading External links |
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Contents Javier Milei Javier Gerardo Milei[a] (born 22 October 1970) is an Argentine politician and economist who has served as the 59th president of Argentina since 2023. Milei also served as a national deputy representing the City of Buenos Aires for the party La Libertad Avanza from 2021 until his resignation in 2023 due to him being elected President of Argentina that same year. Born in Buenos Aires, Milei attended the University of Belgrano, where he obtained a degree in economics, and later obtained a master's degree from the Institute of Social and Economic Development, and another one from the private Torcuato di Tella University. Milei later became a professor of macroeconomics. He rose to public prominence in the 2010s by appearing as a pundit on various television shows in which he was a vocal critic of the Argentine political establishment. In the 2021 legislative election Milei was elected to the Argentine Chamber of Deputies, representing the City of Buenos Aires for La Libertad Avanza. As a national deputy, he limited his legislative activities to voting, focusing instead on critiquing Argentina's political elite and its propensity for high government spending. Milei pledged not to raise taxes, and donated his national deputy salary through a monthly raffle. He defeated the incumbent economy minister, Sergio Massa, in the second round of the 2023 presidential election, on a platform that held the ideological dominance of Kirchnerism responsible for the ongoing Argentine monetary crisis. Milei is known for his flamboyant personality, distinctive personal style, and strong media presence, including his catchphrase "¡Viva la libertad, carajo!".[b] He has been described politically as a right-wing populist and right-wing libertarian who supports laissez-faire economics, aligning specifically with minarchist and anarcho-capitalist principles. Milei has proposed a comprehensive overhaul of the country's fiscal and structural policies. On social issues he opposes abortion and euthanasia, and supports civilian ownership of firearms. He also supports freedom of choice on drug policy and prostitution. In foreign policy he advocates closer relations with the United States and with Israel. Early life and education. Javier Gerardo Milei was born on 22 October 1970 in Palermo, Buenos Aires, to Norberto Milei and Alicia Lucich. He grew up in the neighborhood of Villa Devoto and later moved to the Sáenz Peña district. Alicia worked as a homemaker, and Norberto was a bus driver who later became a successful businessman. Milei is of paternal Italian descent. His grandfather came from Rossano in the Calabria region of Southern Italy in 1926. His father's maternal great-grandparents came from the municipalities Francavilla in Sinni and Pignola in the Basilicata region of Southern Italy. On his maternal side, he is of Croatian and Italian descent. His mother's paternal grandparents and great-grandparents came from Jelsa on the island of Hvar and settled in San Lorenzo, a department in the province of Santa Fe in Argentina. His mother's maternal grandparents came from San Severino in the Marche region of Central Italy and settled also in San Lorenzo. Furthermore, Milei revealed in 2024 that his grandfather, a great influence in his life, discovered that he was Jewish from matrilineal descent shortly before his death. He also expressed that his grandfather's maternal grandfather may have been a rabbi. Milei says he was subject to abuse during his childhood, and after he moved away from home as a young adult, he did not speak to his parents for a decade. By 2018 he had stopped talking to them entirely and regarded them as dead. Milei has said the abuse he suffered contributed to his ability to handle adversity. He was supported by his maternal grandmother and his younger sister, Karina, with whom he shares a close bond and whom he calls "the boss". Milei attended Catholic schools, including the Cardenal Copello secondary school. At school, he was nicknamed el Loco ("the Madman") for his outbursts and passionate rhetoric. In his late teens and early adulthood, Milei sang in the cover band Everest, which mostly played Rolling Stones covers. He also played goalkeeper for the Chacarita Juniors football team until 1989, when Argentina suffered from hyperinflation, and he committed to a career in economics. The collapse of Argentina's exchange rate led to Milei's interest in economics in the early 1980s. Milei studied introductory economics and the law of supply and demand, which he thought seemed at odds with the ongoing hyperinflation; he said he saw people "throwing themselves on top of the merchandise" in a supermarket and began to study economics in more detail to understand it. He specializes in economic growth and has taught courses in economics at Argentine universities and abroad. He was the author of more than 50 academic papers by 2016. By 2016, he became chief economist at Máxima AFJP, a private pension company, and served as head economist at Estudio Broda, a financial advising company, and Corporación América. Additionally, he was a government consultant at the International Centre for Settlement of Investment Disputes and a senior economist at HSBC Argentina. He served as chief economist at several national and international government public bodies. Since 2012, Milei has led the Economic Studies division at Fundación Acordar, a national think tank. He is also a member of the B20 and a member of the Economic Policy Group of the International Chamber of Commerce, an advisor to the G20. For 15 years,[when?] he worked at the private company Corporación América as the chief economist and financial adviser to Eduardo Eurnekian. Milei is the author of several books, including El camino del libertario. He has a notable presence on television, with a 2018 ranking by Ejes showing him as the most interviewed economist on TV, at 235 interviews and 193,347 seconds. Milei also hosted his own radio show, Demoliendo mitos (Demolishing Myths), featuring regular appearances by Alberdian and right-wing libertarian personalities, including the economist and businessman Gustavo Lazzari, the lawyer Pablo Torres Barthe, and the political scientist María Zaldívar. Early political career During the 2010s, Milei regularly participated in televised debates, where he was known for using strong language and confrontational rhetoric. In some instances, he insulted other participants and used profanity when expressing his political views, including during a debate with Buenos Aires chief of government Horacio Rodríguez Larreta. This led many commentators to label him antipolitical or disruptive. Ted Cruz, a United States senator, jokingly proposed inviting him to the 2024 Republican Party presidential debates.[importance?] In February 2017, Milei praised former economy minister Domingo Cavallo, describing him as the best to have held the position in Argentina. He credited Cavallo with ending the 1989 hyperinflation and initiating state reforms, and attributed the 2001 economic crisis to earlier policy decisions that Cavallo was unable to reverse in time. In November 2017, Milei drew attention for criticizing the Faculty of Economic Sciences at the University of Buenos Aires, which he described as a center of Marxist indoctrination. He argued that this had contributed to what he called a widespread dominance of Keynesian economic thought in Argentina. On 26 June 2018, Milei called journalist Teresita Frías “dumb” after she described his political views as totalitarian. Following his refusal to apologize, he was accused of gender-based violence, and a local court ordered a psychological evaluation. Judge Carmelo Paz, from a Family and Gender Violence court, prohibited him from appearing as a panelist or lecturer at public events within the city of Metán, under threat of legal action. That same year, Milei made his acting debut in the play El consultorio de Milei, alongside Claudio Rico and Diego Sucalesca. In 2019, Noticias included him on its list of the most influential people in Argentina. In 2020, he publicly supported protests against the government of President Alberto Fernández. From 2020 to 2021, Milei was a member of Avanza Libertad (Advance, Freedom), a political party founded by José Luis Espert. During his campaign for the Argentine Chamber of Deputies, Milei focused on Buenos Aires neighborhoods, where he took strolls and had talks with ordinary people. He pledged not to support any tax increases or new taxes. He ran under the slogan "I didn't come here to lead lambs, but to awaken lions", denouncing what he saw as a political caste, which he said was composed of "useless, parasitic politicians who have never worked". He called politicians "rats" and said they form "a parasitic caste" that thinks only about getting rich. He used phrases like "I'm here to kick these criminals out" and was especially supported by youth; he promoted his political views on television, radio, and YouTube. Additionally, Milei reconciled with his parents. In July 2021, Milei established the coalition La Libertad Avanza (Freedom Advances), which secured third place in primary elections with 13.66 percent of the vote and third in the 2021 Argentine legislative election with 17 percent, and the libertarian coalition entered the Argentine Congress. They performed best in Córdoba and Santa Fe, the second- and third-most populated districts in the country. They performed well in Peronist strongholds in North Tucumán, Salta, La Rioja, San Juan, and Santa Cruz in Patagonia, which is considered the cradle of Kirchnerism. National deputyship After being elected to the Chamber of Deputies, Javier Milei began raffling off his monthly salary, stating that the initiative aimed to “return money to the citizens” and criticizing taxation as coercive. He described the salary as “dirty money” taken by force and claimed he was returning funds allegedly “stolen by the political caste”. The raffles, open to the general public, had distributed over seven million pesos by the time of reporting. As a deputy, Milei had an attendance rate of 52% in the chamber as of April 2023. By August 2023, he had not introduced any legislation or joined parliamentary commissions. One of his absences was criticized by the opposition coalition Juntos por el Cambio, as it allowed the government to pass a tax increase on airline tickets by a single vote. In July 2023, Javier Milei was investigated over allegations of selling candidacies within his coalition, La Libertad Avanza. Businessman Juan Carlos Blumberg accused the coalition of turning politics into a business, a claim Milei denied. He was also accused of receiving financial and logistical support from Peronist provincial governments. Journalist Juan Luis González alleged that Milei accepted funding and aid from the Peronist sectors he publicly opposed. Prosecutor Ramiro González stated there was no concrete evidence to support the claims at the time. Milei dismissed the investigation as a political attack and called for an inquiry into the prosecutor’s conduct, accusing him of harming his reputation. The case was closed in March 2024 due to a lack of sufficient evidence for formal charges. On 18 December 2021, Javier Milei promoted the financial services company Coinx World on his Instagram account after visiting its offices in Buenos Aires. In his post, he praised the company’s investment platform and encouraged his followers to contact them. Coinx World used the visit for promotional purposes on social media, presenting itself as a fintech firm specializing in algorithmic trading. The company stated that its meeting with Milei was a consultation on communication strategy and claimed that its operations were supported by El Salvadoran legislation, where it was headquartered. Financial experts warned that CoinX's claims were unsustainable and compared its operation to a Ponzi scheme. At that time, neither Javier Milei was registered in Argentina's National Securities Commission to make invitations to the public to invest nor did Coinx World had the authorization to operate in the public offering, which led the National Securities Commission to declare it as an irregular public offering in 2022. In an interview with journalist Ernesto Tenembaum, in June 2022, Javier Milei claimed that he was paid for that public support just like he is paid for "all his opinions," and that the company "did not scam anyone". He explained in that interview, that Coinx World "took money and used it to buy securities in US dollars. With the devaluation that occurred, they were able to pay significantly higher interest rates in Argentine pesos than those offered by Argentina's Central Bank, which allowed them to secure funding to invest in their crypto farms where they generated cryptocurrencies and had more money. The business model was well-structured." Milei could not explain why he encouraged his followers to invest in Coinx World and did not apologize to the victims when asked to do so. Javier Milei also defended the fintech on social media when some followers pointed out it could be a Pyramid scheme. "Coinx paid everyone", he said. "Do not let yourselves be fooled by the paid hitmen of Juntos por el Cambio." In 2023, Coinx World was shut down by regulators after a criminal investigation for allegedly operating as a Ponzi scheme. Police raids were conducted on its offices in Buenos Aires and Santa Fe with four employees, including its CEO, being arrested. Investors, the majority of whom followed Javier Milei on social media, sued him for losses estimated between AR$30,000,000 and AR$40,000,000 (approximately US$300,000 at the time). According to its website, Coinx World operated in Argentina, Brazil, and El Salvador. Elections A member of the Libertarian Party, Milei ran for president of Argentina as part of La Libertad Avanza, a right-wing political coalition. His running mate was Victoria Villarruel. His younger sister, Karina Milei, managed his campaign. In May 2022, Milei was rising in the polls. In June 2022, he officially launched his presidential campaign. In March 2023, a poll showed that 17 percent of Argentines would vote for him and that his political coalition would become the third parliamentary force in the Argentine Congress. His rhetoric was attractive to under-30 voters born during the 1998–2002 Argentine great depression and facing the still ongoing economic stagnation. His supporters include those who once voted for Kirchnerism but would now vote for Milei as a protest even if they did not support his economic ideas. Lucas Romero, the head of Synopsis, a local political consulting firm and Andrei Roman, CEO of Brazil-based pollster Atlas Intel believe that Javier Milei's victory in the 2023 elections was not necessarily a result of popular approval of his ideas but rather stemmed from widespread dissatisfaction with the political establishment, which had been strongly left-wing in its economic approach. The people thus wanted change. As annual inflation rose above 100 percent in May 2023, Milei's position in the polls rose. In June 2023, the markets welcomed Sergio Massa's presidential candidacy, as it polarized the election between the ruling party and Juntos por el Cambio, reducing the "Milei factor". Notable moments in Milei's campaign included a viral video of him tearing cards from a wallboard with the names of ministries that he wants to abolish and tossing them into the air as he said afuera ("out"), wielding a chainsaw on stage, smashing a piñata on air to symbolize his plans, calling Pope Francis "a filthy leftist", and praising American gangster Al Capone as "a hero". In the August 2023 primary elections, which are seen as an indication of how citizens are likely to vote in the October 2023 general election, Milei emerged as the leading candidate, with 30 percent of the vote, ahead of the traditional Peronism–Kirchnerism and Macrism that dominated the country in the 2010s. Milei's victory was celebrated by right-wing figures, including Jair Bolsonaro, José Antonio Kast, Ted Cruz, and the Spanish conservative political party Vox. Polls had predicted that Massa would secure the most votes as a candidate in the primaries, with Juntos por el Cambio expected to be the most supported coalition overall; Milei polled at about 20 percent and was seen as an outsider candidate. Initially, for the first round of the general election, with the possibility of a runoff in November, Peronists saw Milei as a possible ally who would divide the votes of the Juntos por el Cambio coalition. As a result of his strong performance in the primaries, Milei was considered the front-runner in the general election. His rise has been placed within the context of the last two presidencies of Mauricio Macri and Alberto Fernández. On 22 October, Milei advanced to the runoff, facing Massa in what polls showed as a tight race. In the runoff on 19 November, Milei defeated Massa in a landslide and a historic election. It was the highest vote percentage since Argentina's transition to democracy. Observers generally saw Milei's win as a sign more of discontent with the status quo than support for his politics, and his victory was likened to Donald Trump's in the United States and Jair Bolsonaro's in Brazil. Within the Argentine Congress, Milei's coalition achieved about 20% in the Chamber of Deputies and 10% in the Senate. In his victory speech, Milei pledged a new political era, vowing to begin "the reconstruction of Argentina" and end its economic decline. As of 1 pm, 23% of the electorate had voted by noon. This was notably lower than 2023, where voter turnout was 30.3% by noon. At 9:25 pm, results were published, with La Libertad Avanza in first place with 40.84% of the vote, much stronger than expected, and the opposition Peronist coalition Homeland Force in second place with 31.63% of the vote. Turnout was lower than usual, at 67.85 percent of the 36 million eligible voters – the lowest tally for a national election since the return of democracy in 1983. Prior polling forecasted La Libertad Avanza attaining 30 to 35% of the vote. Several American media outlets reported the strong win as a renewed mandate for Milei’s policies. Presidency (2023–present) Milei took office as president on 10 December 2023, amidst a lack of support in Congress, an annual inflation rate approaching 200%, rising poverty, and a polarized population as challenges for his presidency. His foreign minister, Diana Mondino, announced that Argentina would not join the BRICS bloc of developing economies, as had been planned for 2024. In his first speech as president, Milei warned of an economic shock, described as shock therapy in monetary terms, to be used to fix Argentina's financial woes. Following his inauguration, Milei saw his popularity rise. After the first governmental and economic reforms he and his ministers made, 53% of the Argentine people had a good or excellent opinion of him, according to a poll by Aresco on 15 December. Milei's cabinet includes ministers from La Libertad Avanza and Juntos por el Cambio. In his first acts as president, Milei signed 13 decrees related to his cabinet members. He also lowered the number of ministries from 18 to 9. He appointed three secretariats with portfolio rank, including his sister, to the position of General Secretary of the Presidency, after modifying the anti-nepotism law prohibiting the appointment of family members. Milei signed Decree 70/2023, deregulating the Argentine economy. Since such a move is subject to approval by Congress, it called for an extraordinary session, to be held in the first months of 2024.[needs update] As part of the measure, an estimated 5,000 public sector employees were expected to be affected. An Argentine court halted the labor reforms that were part of the decree. The CGT also organized a general strike against the proposed policies involving tens of thousands of Argentine workers on a 12-hour strike, which resulted in the cancellation of hundreds of flights. In March 2024, when Argentina submitted a complaint against Venezuela to the International Civil Aviation Organization for violating the Convention on International Civil Aviation, Milei and Venezuelan President Nicolás Maduro traded accusations. That month, Milei approved the transfer of two military Mi-171E helicopters to Ukraine, which it later received. On 18 April, Argentina formally submitted a request to become a NATO global partner. Meanwhile, various anti-government protests took place from January to June over e.g. not increasing university funds and cuts to subsidies and social programmes. These protests occurred in the context of broad, general approval according to a poll published by Clarín on 7 June 2024, where most Argentines had a positive image of their president and an optimistic view of future economic measures. Under his watch, Argentina exited deficit for the first time in 123 years. In a speech given to the World Economic Forum, Milei encouraged a worldwide push for libertarianism, claiming Argentina's was a successful example. He also stated that "radical feminism" was a "distortion" of equality. In 2024, legal scholar Manuel García-Mansilla was nominated to fill the vacancy left by Minister Juan Carlos Maqueda and Ariel Lijo was nominated to fill the vacancy left by Elena Highton de Nolasco to the Supreme Court by Milei. On 26 February 2025, Milei appointed both of them by presidential decrees after they failed to obtain clearance in the senate. Some lawmakers questioned Lijo's fitness to serve on the court over corruption concerns, and Human Rights Watch called Milei's appointments "one of the most serious attacks against the independence of the Supreme Court in Argentina since the return of democracy". On 4 April 2025 both were rejected by the Senate, with Mansilla receiving 51 votes against and 21 in favor and Lijo receiving 43 votes against and 27 in favour, in what was branded as a tactical alliance between UP and PRO. The primary reason was the majority of senators disapproval of appointment by decree to the Supreme Court which was described as a political defeat for Milei. In May 2025, Milei signed a decree to tighten immigration laws in Argentina. Milei said that immigrants were bringing "chaos and abuse" to Argentina and ordered that the path to citizenship be restricted, with foreign nationals having to reside two years without interruption in Argentina and show proof of income or "sufficient means", plus a clean criminal record in their home countries. Presidential spokesman Manuel Adorni said that Milei's decree "honors history to Make Argentina Great Again", as the opposition likened Milei's move to Trump's similar immigration policies in the US. On 18 May 2025, local elections were held in the capital of Argentina, Buenos Aires. Manuel Adorni, Milei's top presidential spokesman, attained victory with 30% of the votes, a larger margin than anticipated; while the center right opposition, PRO suffered its worst defeat since taking power in Buenos Aires two decades ago, with only 16%. The peronist candidate Leandro Santoro lost with 27% of the votes. The voting turnout for the election was at a historic low of 53% despite compulsory voting. On August 2025, Karina Milei, who holds the post of Secretary General of the Presidency and is a close adviser and sibling to President Javier Milei, had been implicated in a corruption scandal centering on alleged kickbacks from pharmaceutical contracts managed through Argentina's National Disability Agency (ANDIS). The allegations emerged after leaked audio recordings from Diego Spagnuolo, the former head of ANDIS and previously a lawyer for Milei, in which he claims that companies seeking disability-related contracts were pressured to pay an "8% commission" (kickback) on contracts, a portion of which would go to Karina Milei and her associate Eduardo "Lule" Menem. The scandal has been politically damaging as it contradicts Milei's public image as an outsider committed to fighting corruption; it has provoked public outrage, especially given that the alleged misconduct involves contracts aimed at vulnerable populations; and it may have electoral consequences for his party (La Libertad Avanza) in forthcoming legislative elections. Though there is no evidence that Javier Milei had a role in the scandal, it still affected his chances of winning the electoral vote in Buenos Aires, resulting in a Peronist victory. On 7 September 2025, following weeks after Karina's scandal came to light, Milei's party had lost a key electoral election in Buenos Aires, with La Libertad Avanza attaining 33% of the votes while the Peronist opposition received 47%. President Milei conceded defeat and reflected on the reasons for the loss, but vowed to not repeat his mistakes and to accelerate his economic agenda ahead of schedule. In 2023, Peronism got 4.3 million votes (about 45%) while LLA received 2.3 million. This time, it got 3.8 million vote while LLA attained 2.7 million votes. Voter turnout was only 61%. On 10 September 2025, Milei reorganized the Secretariat of the Interior into a ministry, reversing a downgrade in 2024 that he had made as part of his pledge to reduce public deficits and the size of the government. This occurred amid La Libertad Avanza losing heavily in the 2025 Buenos Aires provincial election. In October 2025, President Javier Milei's party, La Libertad Avanza, won a landslide victory in midterm elections, making it easier for Milei to push ahead with his programme of radical spending cuts and free-market reforms. In late 2025, the Milei administration announced the creation of a new "Agencia Nacional de Migraciones" (National Immigration Agency), moving control from the Interior Ministry to the Security Ministry, with a focus on border control and security, described by some as an Argentine equivalent to U.S. Immigration and Customs Enforcement (ICE). Javier Milei, following a strong showing in the recent mid-term elections where he tripled his presence in Congress, has embarked on a drive to solidify his reform agenda in Argentina. First, he convened governors and the Buenos Aires mayor at the Casa Rosada, gathering 20 out of 23 provinces (while excluding four Peronist leaders) to build consensus around his 2026 Budget and structural reforms focused on labour, tax and penal-code changes. Concurrently, he announced a sweeping “new economic roadmap” to be deployed once the new Congress seats in December, featuring major labour, tax and pension overhauls aimed at restoring fiscal balance, formalizing informal work, simplifying the tax burden and protecting private property — part of his broader vision of making Argentina “the freest country in the world.” In 2024, under President Javier Milei, Argentina saw major economic changes, focusing on austerity, deregulation, and reducing government spending. The most pressing issue for Milei was hyperinflation. Inflation dropped from 300% in May 2024 to 55.9% in March 2025, the lowest level in over three years, with monthly inflation hitting a five-year low of 2.2% in January. Milei cut government positions by approximately 52,000, a reduction of between 9.6% and 15.7%; reduced salaries of high ranking officials; and shut down the tax agency (AFIP), replacing it with a smaller one, saving billions. While poverty rose to 57% early in 2024, it declined to 38.1% by Q3, with homelessness also decreasing. The economy shrank in early 2024, but grew 3.9% in Q3, helped by an 80.2% rebound in agriculture. The Argentine peso strengthened by 44.2% against the U.S. dollar, boosting average wages in dollar terms to $990. Wages, along with purchasing power in Argentina began falling in October 2023, before Milei was elected and inaugurated as president. By the start of his presidency, real wages fell by more than 20%. They have mostly rebounded back to their November 2023 levels, ending the first year of his presidency as an economic success. Argentina paid off $4.3 billion in debt, and investor confidence soared, pushing bond prices higher. According to Gallup, the confidence in the economy by everyday people soared in end of 2024, reaching heights not seen since 2015. The country signed a free trade deal with the EU, and credit ratings improved. Forecasts predict economic growth of 3.5%–5.5% in 2025 as inflation stabilizes and investments increase. Argentina's market risk assessment fell below 500 points for the first time since 2018. 2025 was a turbulent year for Milei. Inflation had become 1.5% a month, and poverty had markedly fallen to 31.6%, the lowest it had been since 2018. In the first half of 2025, reports indicate that the middle class grew by 7.7 million, rebounding back to pre-pandemic levels of 39% Moody's have increased Argentina's rating from 'Ca' to 'Caa3 as Argentina's economy demonstrates solid recovery progress. GDP is expected to grow 5.5% in 2025, and average wages increased 20.7% in the first half of 2025, outpacing the country's 15.1% inflation rate. Milei has contended that a fiscal surplus remains non-negotiable, with a target of 1.6% for 2025. Karina's scandal and the subsequent loss of the legislative elections in Buenos Aires resulted in backlash from the markets, temporarily jeopardizing the macro-economic situation that Milei had dedicated his presidency to date, as the market feared that Milei losing the midterm elections would result in the stifling of his agenda. The meltdown caused Argentina to blow through 1 billion dollars of reserves to uphold the peso. U.S. Secretary of the Treasury Scott Bessent's announcement that all options are available between the American treasury and Argentine government halted the gradual implosion. The economic reforms and policies have had a significant impact on the average Argentine, as some common expenses such as private school tuition and health insurance plans have risen above CPI. Despite soaring disapproval ratings, Milei achieved victory in the legislative elections of 2025, attaining a larger than expected share of votes. The victory galvanized the economy, leading towards bonds increasing by 23% in a day, the Argentine stock market growing by 70% compared to last month and the peso briefly appreciating in value. The country risk index dropped by 40% after the elections. Inflation was the foremost largest issue dominating contemporary Argentine politics, as it spiraled out of control during and for some time after the elections of 2023. The issue had been a consistent phenomenon throughout the history of Argentina, a country whose economy had been mismanaged for decades. Milei, convinced that the Peronist establishment largely caused the economic crisis, made it his main objective during the first and second year of his presidency to stop the situation from getting worse through anti-inflationary economic policies, and to diminish the influence of Peronism. Annual inflation stood at 254.2% in the first month of Milei's term, and reached a peak of 300% in May 2024. Monthly inflation slowed in 2024 as Milei continued to push austerity and deregulation measures to revive the country's struggling economy. Annual inflation rate came in at 39.4% in July 2025. On the same month, monthly inflation reached a 5-year low of 1.5%. Wages, along with purchasing power in Argentina began falling in October 2023, before Milei was elected and inaugurated as president. By the start of his presidency, real wages fell by more than 20%. In 2024, wages rose by 145.5%, outpacing the 117.8% inflation rate for the first time since 2021, according to INDEC. According to Nowcast, the year-over-year increase in total family income (ITF) reached 185.7%. In October 2024, CEPA reported that private sector wages had nearly returned to November 2023 levels. However, public sector incomes remained 14.8% lower, and informal workers were still down 21.3%. Continuing this trend, wages have risen by 20.7% in the first half of 2025, above an inflation rate of 15.1%. The defeat in the local elections in Buenos Aires scared the market, with investors afraid that Milei will not be able to maintain his free market agenda in his presidential term. Victory in the legislative elections caused the Peso to rally temporarily before stabilizing again. During his campaign and throughout his presidency, Javier Milei has said several times that the reforms he plans to enact are "painful", but "necessary", contending that it is "the only way". "There is no alternative to a shock adjustment", Milei said during his inauguration. "There is no money." In June 2024, Milei was able to pass his tax and 'omnibus' bill. The bill, watered down significantly from its original form, aimed at deregulating and reforming several sectors and state owned enterprises in Argentina, also included reforms concerning labour, commerce and real estate and various social programmes such as healthcare. President Javier Milei achieved a budget surplus within the first few months in office by gutting chunks of the government structure and downsizing it drastically and reducing the salaries of high ranking authorities, leading to a reduction of government spending by 30%. This has resulted in a financial surplus for 6 consecutive months for the first time since 2008. The reforms have led to 9.6% of all federal employees (approximately 52,000) being laid off, saving the government nearly 2.1 billion in taxes. In July 2024, the Argentine National Congress approved Milei’s Ley de Bases, a wide-ranging reform law that marked a major legislative achievement for a government with limited parliamentary representation; a central element of the law is the Incentive Regime for Large Investments (Régimen de Incentivos para Grandes Inversiones, RIGI), which seeks to attract large-scale domestic and foreign investment by guaranteeing stable tax, foreign exchange, trade, and capital repatriation rules for up to 30 years. The regime applies to projects exceeding US$200 million in sectors such as energy, oil and gas, mining, infrastructure, forestry, tourism, technology, and steel, with enhanced benefits for investments above US$1 billion, including lower corporate and dividend taxes, phased elimination of export taxes, and exemptions from capital and trade controls. RIGI is predicted to reduce investor exposure to Argentina’s historically volatile economic conditions and support a shift away from a state-centered, inflation-prone economic model toward greater financial stability and private investment. Milei's repealing of rent controls in December 2023 has caused rental unit supply to increase by 190%. This resulted in a 40% decline in real price of rental properties when adjusted for inflation. Inflation-adjusted rents have remained relatively stable since. From January to May 2025 rents have increased by 1.6% after adjusting for inflation. "He has done more good than many people expected", said Alejandro Werner, a former official with the International Monetary Fund. "Maybe I would choose to do it a different way. But, sometimes, to change things, you need somebody that’s a little bit of a fanatic to really move the needle. And he has done it." Though the macroeconomic side had become stabilized, the societal consequences were palpable. Patience towards president Milei's reforms runs thin as his economic reforms cuts into salaries and pushes up the cost of living. Data from the IARAF institute shows President Milei decreased government spending by approximately 8 billion dollars in 2 years. During the first six months of his presidency, poverty rates increased by over 11 percentage points, from 41.7% to 52.9%, briefly peaking at 57.4% at the end of January 2024. In response, his government pointed out that poverty rates were already rising under previous administrations. According to INDEC, poverty rates fell to 38.1% during the third quarter of 2024. Conversely, the Catholic University of Argentina (UCA) estimated poverty for the same quarter as 41.6%, adjusted for the reduced consumption rates as well as rising healthcare costs. The Ministry of Human Capital estimated a drop in poverty during the first quarter of 2025 from 38.1% to 31.7%. An economist working for CEDLAS (Center for distributive, Labour and Social Studies), estimates that between October 2024 and March 2025, the poverty rate dropped to 34.4%. A report published in July 2025 largely confirmed these predictions, finding that Argentina's urban poverty rate dropped to 31.6% in the first half of 2025, its lowest level since 2018. Extreme poverty also decreased from 18.2% to 7.4% annually. INDEC reported the official poverty rate to be 31.6% of the general population in the first half of 2025, with household poverty coming in at 24.1%. The UCA disputes the magnitude of the reduction, arguing that INDEC uses an inadequate methodology. They find that poverty has decreased to 36.3%, compared to their previous estimate of 45.6% in the same period a year ago, lowest since 2018. Infant mortality rose by 6.25% in 2024, breaking with a long downward trend, which could be due to budget cuts in perinatal care programs and the government's withdrawal from public health management. In June, during a meeting in Berlin, Milei and German chancellor Olaf Scholz expressed support for a free trade agreement between the EU and Mercosur. An agreement on the free trade deal was announced on 6 December 2024. Milei's actions have led to Argentina regaining a favourable relation with the IMF after having been in a precarious position for almost 2 years, securing a 20 billion dollar loan. Since July 2022, the country has consistently kept a risk assessment of over 2000 points, well above the continental average of 250 points, marking significant volatility and lack of trust in the market. Since Milei's victory, the risk assessment trended downward, falling below 500 points for the first time since 2018. The loan is set to be used to disintegrate the remaining capital controls on the peso, as well as aiding the government in building up reserves, which had been exhausted prior to his presidency. J. P. Morgan has commented that "The policy advancements represent a significant step forward, enabling the country to unlock a potential that has been stifled for decades due to poor policy-making." Argentina is the IMF's largest debtor country. The possibility of a peronist victory led towards the market reacting with fear, resulting in the peso depreciating and the central bank having to spend a billion dollars to maintain the currency in its bandwidth. The market risk index surged due to this reaction. By June 2025 foreign inflows of cash grew constrained in Argentina falling 54% in 2024, and as of April 2025 stands at a $3 billion deficit. On September 2025, the possibility of Milei losing the midterm elections sent shockwaves throughout the Argentine market, leading towards intervention by the central bank. U.S Secretary Scott Bessent's announcement that a 20 billion dollar swap line for Argentina was ready, which halted the market meltdown, leaving it in a fragile state. Milei's attempt on stabilizing the currency has led towards an increase in purchasing power, which Argentines have exploited by travelling abroad. This has cost the government billions. Mr. Milei is testing the patience of ordinary Argentines, as his economic reforms cuts into salaries and pushes up the cost of living. Shortly after Milei's strong performance and victory in the 2025 legislative elections, the Argentinian bond market surged, with dollar notes due in 2035 having increased by 23% in one day. Argentina's risk index plummeted by 40% (1081 to 652) in the same day. Seeing the relative stability of Argentina's economy post elections, US banks revisited the deal for a 20 billion dollar swap, downsizing it to 5 billion dollars. In the first and second quarter of 2024, Argentina's GDP contracted by 2.1% and 1.8%. However, in the last quarter, it expanded 3.9%, despite the significant austerity implemented by the President. Conversely, agriculture rebounded dramatically from a severe drought, achieving an impressive growth rate of 80.2% as conditions improved. The economy of Argentina is projected by the BBVA to grow by 5.5% in 2025, and by Goldman Sachs by 3.5% and 4.5% by the Argentine central bank, as inflation stabilizes and investment starts pouring in, due to Milei's liberalization of the economy. The financial improvements seen in the 3rd quarter of 2024 are complemented by society's renewed confidence in the government, creating a positive outlook for 2025. Economic activity during January 2025 returned to levels not seen since July 2022, trended to increase. The volume of real loans towards the private sector is at an all time high in both dollar and peso denominations. GDP has proven difficult to increase under austerity, with economists revisioning their 2025 forecast for growth to 5% as the economy shrank by 0.1% in May of the same year. Moody's have increased Argentina's rating from 'Ca' to 'Caa3' due to the reforms initiated by President Milei. According to CNN, Argentina's stock index MERVAL soared by 22% one day after Milei's victory in the legislative elections of 2025, indicating significant trust in the Argentine government's ability to continue its liberalizing reforms. Milei made a radical change to Argentina's traditional foreign policy, aligning Argentina with the United States and Israel. Some analysts, like Ayelén Oliva of the BBC News or Walter Schmidt of Clarín, have compared his rapprochement to these countries to President Menem's similar policies in the 1990s. Milei's views on the Russian invasion of Ukraine had distanced him from other right-wing figures. He first supported Ukraine in its defense against Russia, and sent military helicopters to Ukraine during the first months of his presidency. Milei also cooled relations with Russia, and has considered sending more lethal aid to Ukraine. However, since the change in U.S. administration in 2025, Milei's government started backing U.S.-led peace efforts. During the Gaza war, Milei was a fierce supporter of Israel, vowing his "unwavering" support. Among his measures in support of Israel, Milei declared Hamas as a terrorist organization in July 2024, and ordered the Argentine delegation at the UN to vote against the incorporation of the State of Palestine into the United Nations. Milei also made a state visit to Israel on 6 February 2024, in which he announced plans to relocate the Argentine embassy in Israel from Tel Aviv to Jerusalem, and where he visited a kibbutz that had been attacked by Hamas militants during the October 7 attacks. Milei declared two days of national mourning over the return of the bodies of the Bibas family (who were Argentine citizens) on 21 February 2025. On 11 June 2025, while addressing the Knesset, Milei confirmed that Argentina will effectively move its embassy to Jerusalem. On 20 June 2025, while giving an interview, Milei stated that Iran is an enemy of Argentina, citing past terrorist attacks on Argentine soil allegedly supported by the Iranian regime. Milei celebrated Israeli strikes on Iran, stating that "today is a great day for Western civilization". Milei was the first non-Jew to receive the Genesis Prize, dubbed the "Jewish Nobel" in 2025. Milei's $1 million award money supported the creation of the Isaac Accords to deepen ties between Israel and Latin America. In November 2025, Milei met with Israeli FM Gideon Sa'ar and announced that he will travel to Israel between April and May 2026 to officially inaugurate the Argentine embassy in Jerusalem, with FM Pablo Quirno making a previous trip to formalize the move in February. In Latin America, Milei dismissed the results of the 2024 Venezuelan presidential election as "fraudulent" and called on Nicolás Maduro to resign. On 7 August 2024, Argentina became one of the first nations to recognize Edmundo González as the legitimate President of Venezuela. Milei also met with U.S. Secretary of State Marco Rubio during the second inauguration of Donald Trump and reaffirmed the intention to continue to pressure Maduro to exit power. As a result of the ensuing tensions, Venezuela ordered Milei's arrest and Argentina ordered Maduro's arrest. Milei has expressed discontent or strong ideological differences with China, even threatening to cut ties with China during his presidential campaign. In the immediate aftermath of Milei's electoral victory, the government of Taiwan congratulated Milei and said that Taiwan would seek to strengthen ties with Argentina. Moreover, it was rumored in December 2023, that then Foreign Minister Diana Mondino had held a meeting with a Taiwanese official, raising suspicions of Taiwanese financing of Milei's presidential campaign. In response to these allegations, China's ambassador to Argentina Wang Wei issued a statement reaffirming the principle of a One-China, adding that Taiwan is an "inalienable part of China" and an internal affair as well. Following threats by the Chinese government to stop buying soy and meat from Argentina in response to perceived ties between the two governments, the Argentine government clarified that there were no official contacts between Argentine and Taiwanese officials. In January 2026, Milei said that his position on China has not changed, adding that trade agreements and other contacts with China respond to "pragmatic reasons" and not to ideological changes about the Chinese government. Milei is also a strong opponent of the Communist Party of Cuba and Cuban government, calling First Secretary of the Communist Party of Cuba Miguel Díaz-Canel "despicable" and referring to Cuba as a "prison island". In October 2024, Milei fired foreign minister Diana Mondino after she failed to vote for the US embargo on Cuba at the UN, later assuring that Argentina condemns the "Cuban dictatorship". Milei has also condemned other leftist leaders in the region, calling Colombian President Gustavo Petro a "murderous terrorist" and Brazilian President Lula da Silva "corrupt" and "communist". In July 2024, Milei had a diplomatic confrontation with Bolivian President Luis Arce over the 2024 Bolivian coup attempt, which Milei dismissed as "false" and orchestrated by Arce himself. Milei enjoys a friendly personal relationship with former Brazilian president Jair Bolsonaro and U.S. president Donald Trump, and attended Trump's second inauguration as President in January 2025 in Washington. Similar to Trump's first measures, Milei expressed intention to withdraw Argentina from the Paris Accord and the World Health Organization, saying that the government is studying the possibilities of suspending Argentina's memberships. Argentina subsequently announced, on 5 February, that it would withdraw from WHO, citing "deep differences" with the organization. On 27 May 2025, during a meeting with US Secretary of Health and Human Services Robert F. Kennedy Jr. in Buenos Aires, Milei ratified Argentina's withdrawal from WHO, accusing the organization of basing its positions on political interests and bureaucratic structures while refusing to review what he claimed were mistakes. In October 2025, Milei and the government of Argentina signed the nomination of Donald Trump for the 2025 Nobel Peace Prize, which was later won by Venezuelan opposition leader María Corina Machado. Milei congratulated her for "fighting against the narcodictatorship in Venezuela". That same month, Milei ordered to vote in favor of the US embargo on Cuba. It was the first time in history that Argentina supported the blockade, voting along six other countries: the US, Israel, Hungary, Paraguay, North Macedonia, and Ukraine. In January 2026, Milei celebrated the capture of Nicolás Maduro on social media, posting on X: "liberty advances, ¡Viva la libertad, carajo!". In a later interview, Milei expressed support for the US taking charge of the oil industry in Venezuela, which Milei said will "cut supply to communists." On 17 January 2026, amid the severe crackdown on Iranian protests, Milei signed a decree officially designating the Quds Force of Iran's Islamic Revolutionary Guard Corps (IRGC) as a terrorist organization. In February 2025, Milei publicly promoted the cryptocurrency $LIBRA, a meme coin, on his X account; the coin suffered a disastrous price drop shortly afterwards. Commentators have said that it could have been a rug pull. The resulting controversy was dubbed Cryptogate by the media. The Economist called it the "first big scandal" of Milei's presidency. In response, opposition politicians in Congress called for Milei's impeachment, and a group led by Claudio Lozano [es], the leader of the opposition Popular Unity party, filed charges of fraud against Milei. However, the initiative does not have enough supporters in the Impeachment Commission to proceed with the proposal. Milei conceded that promoting the coin was a mistake on his part, noting that he did not participate in its development. However, reports suggest close associates of Milei, Mauricio Novelli and Manuel Terrones Godoy, were in touch with LIBRA's creator Hayden Davis, who was responsible for the launch of the token. Novelli was reported to have accepted bribes in exchange for providing access to the president and having facilitated the president's promotion of the token; although there is no evidence that Milei was aware of this. Milei and his government have defended him and said that he regularly promotes private Argentine ventures and projects online on his X account to attract investments and create jobs; and will continue to do so. One government official described Milei as the scam's biggest victim and said that he was cheated. Because of the rug pull, Milei ordered the Anti-Corruption office to determine whether any improper conduct occurred by any member of the national government, including himself. However, this office is part of the executive branch, and its director was placed in office by Milei. Milei's lawyer stated that Milei's behaviour "does not constitute any crime, due to the lack of intention". Milei also stated in an interview that he would seek legal advice from Mariano Cúneo Libarona, the minister of justice, an action seen as an acknowledgement that the promotion was an official action as president. However, he also argued that the "volatility traders" who lost funds understood the risks involved. In a Gallup poll on 10 December 2024, the approval ratings for Milei were still over 50%, with trust in the government having doubled since 2023. The perception of the economic situation and the standard of living has also improved, with 53% of Argentines believing that their standard of living is now better, reaching the same high as 2015. 41% believe the economy of their city is also improving, reflecting a more optimistic view of Argentina. However, 69% of Argentines believe that it is a bad time to look for a job in this economy, while 35% do not have enough money for food, although these figures are a modest decrease from their two-decade high, in 2019. 59% of the richest 20%, but only 39% of the poorest 20% approve of Milei's governance, though the ratings are still higher across the socioeconomic board when compared to Milei's predecessor, Alberto Fernández. Through 2024 in to March 2025, Milei's approval rating declined from 49% to 47% with his disapproval numbers rising from 48% to 49%. His two predecessors, Alberto Fernández and Mauricio Macri saw a 50% to 28% and 72% to 45% drop during the same periods in office. The issues cited most commonly by respondents were the current IMF negotiations and the handling of the Bahia Blanca natural disaster. The corruption scandal revealed in August 2025 had a profound impact on Milei's approval rating, shifting from a steady 48% just a month before to 39%. In late August, local outlets released audio recordings that allegedly captured a high-ranking government official talking about bribes and implying that Karina Milei, the president's sister and chief of staff, was receiving kickback payments. Javier Milei has rejected the claims as false, while Karina has not publicly addressed them. His supporters have claimed that his opponents, the Peronists and Kirchnerists have framed or otherwise. Despite the scandal Milei's party, La Libertad Avanza remains as one of the most popular parties in Argentina. On 25 September 2025, the approval rating for Javier Milei was at an all-time low of 32.1%, largely due to the Jose Espert's - La Libertad Avanza's lead candidate for the Chamber of Deputies in Buenos Aires Province - ties to drug traffickers being exposed as well as the economic crisis of September 2025. Despite disapproval ratings soaring, Milei's party - La Libertad Avanza - attained a larger than expected victory in the legislative elections of 2025. According to political scientist Carlos Fara, the rejection of Peronism “carried more weight” than the recent political and corruption scandals surrounding Milei’s government, the run on the peso and “the fatigue with the President’s leadership style." This was reflected in the low turnout of 67 percent, the lowest figure since 1983 in a country with compulsory voting. In the end of November 2025, his approval rating jumped between 42.6% and 49%. Men have a significantly more positive image of Milei than women. Political positions Milei advocates minimal government, focusing on administering justice and ensuring security, with a philosophy rooted in life, liberty, and property, and free market principles. He criticizes socialism and communism, advocating economic liberalization and restructuring of government ministries. He opposes Argentina's Central Bank and current taxation policies. Economically, Milei is influenced by the Austrian school, and admires former President Carlos Menem's policies. He supports capitalism, viewing socialism as embodying envy and coercion. Milei proposes reducing government ministries and addressing economic challenges through spending cuts and fiscal reforms, criticizing previous administrations for excessive spending. He has praised the monetary policies of former British prime minister Margaret Thatcher and called her "a great leader". Milei opposes abortion and euthanasia, rejects the characterization of homosexuality as a disease, and supports privatization in education and healthcare. He opposes mandatory vaccination and supports drug legalization and the legalization of prostitution. As a supporter of the right to keep and bear arms, Milei advocates for the deregulation of firearm ownership and proposes immigration restrictions for criminals. In foreign policy, Milei criticizes the IMF, opposes trade unions, aligns with anti-socialist figures of the Americas like Donald Trump and Jair Bolsonaro, and prioritizes alliances with the United States and Israel. Milei has disputed the estimated death toll of the Dirty War and removed funding for special prosecutors claiming it violates the country's constitution. He had been critical of relations with China because of its communist ideology during his presidential campaign, but he came to see China as a business partner in the first year of his presidency. He supports Ukraine against Russia in the latter's ongoing invasion. He opposes the transgender rights movement and what he calls a "cult of gender ideology". He repealed the decree that established a job quota for transgender people in the public sector. Milei advocates for dialogue with the United Kingdom over the Falkland Islands sovereignty dispute. In May 2024, he indicated, for the time being, his general acceptance of the Falkland Islands' status as a British Overseas Territory, accepting that it could take decades for Argentina to regain control of them. Though asserting that Argentina would not "relinquish [our] sovereignty" over the islands, Milei said he would not "seek conflict with the United Kingdom", preferring to resolve the dispute "within the framework of peace". Public image Milei has cultivated a complex and controversial public image marked by a blend of populist, right-wing libertarian, and conservative ideologies. Known for his ultra-liberal economic views and right-wing populist rhetoric, Milei's political stance has been subject to various interpretations by international media and political commentators. His rise to prominence during the 2023 presidential campaign, fueled by his primary win, sparked widespread attention, as did his central bank abolition and dollarization proposals. Milei is known for his flamboyant personality, distinctive personal style, and strong media presence, which sometimes causes controversy, and his embrace of conspiracy theories, including the Cultural Marxism conspiracy theory. He has also called the idea of climate change as an anthropogenic phenomenon "a socialist lie" and said that concerns about it are nothing more than "deceptions promoted by the neo-Marxists", as are those related to the attempts to overturn the 2020 United States presidential election. Echoing Donald Trump, he also claimed electoral fraud ahead of the 2023 presidential runoff. Like other right-wing populists, his rhetoric focuses on opposing what he calls "the political caste". Milei's party was criticized for including among his candidates apologists for the National Reorganization Process. During his political career, Milei has also been involved in several investigations and has been accused of having a violent attitude toward journalists and critics, as well as of misogynistic behavior, including toward women in journalism. Milei is a cosplayer with a superhero persona called "General AnCap". He also champions free love. In addition to being nicknamed el Peluca ("The Wig") for his eccentric hair, which has been compared to that of Trump and fellow right-wing populists Boris Johnson and Geert Wilders, Milei is known as el Loco ("The Madman"). News outlets have likened him to both Trump and Wolverine. His admirers also call him "The Lion" because of the lyrics of the song "Panic Show" by rock band La Renga, which he sings in his public acts, coupled with his looks (in particular, his long hair). Time named him one of the 100 most influential people in the world in 2024 and 2025. The chainsaw has become an enduring and popular symbol associated with Milei (he has been called the "chainsaw candidate"), specifically symbolizing his "cutting" of regulations, bureaucracy, and red tape in Argentina. Some commentators have called Milei's economic policy of cutting regulations "chainsaw economics". Milei's supporters often carry chainsaws at rallies, symbolizing "his promise to cut down the size of the state". Milei is also well known for his phrase "¡Viva la libertad, carajo!", which is uttered most especially at the end of various speeches given by him. Honours and awards Milei was awarded the 2025 Genesis Prize in recognition of his support of Israel. Time named him one of the 100 most influential people in the world in 2024 and 2025. Personal life Milei is unmarried and, while he was a presidential candidate, said that, if elected, he would have his sister take the role of First Lady of Argentina. However, in December 2023, after winning the presidency, he announced that his government would not have a first lady. He called the role "anachronistic" and declared that this decision was taken after discussions with both his sister and his girlfriend, actress Fátima Flórez. Milei originally announced he was dating Fátima Florez in August 2023. Previously, he dated singer Daniela Mori [es]. While raised Catholic, Milei had been critical of the Catholic Church under Pope Francis, and his disparaging comments about Francis attracted criticism from Catholics. Conversely, Milei would later embrace Francis after meeting him, stating in a Retequattro interview, "I had to reconsider some positions, and starting from that moment, we began to build a positive relationship." Milei also reads the Torah daily and has visited the grave of Orthodox rabbi Menachem Mendel Schneerson. Before November 2023, Milei said he had contemplated converting to Judaism but that observing the Jewish Sabbath could pose challenges if he became president. Upon being elected president, it was reported that Milei intended to convert to Judaism. Milei has confessed that he professes a "fanaticism" for Judaism. Milei owns five cloned English Mastiffs, their progenitor being Conan, who died in 2017 after suffering from spinal cancer. He considers Conan his son (a form of pet humanization), and has named four of Conan's six clones, including one named after the original and another named Angelito, Milton (in honor of Milton Friedman), Murray (in honor of Murray Rothbard), Robert, and Lucas (both named after Robert Lucas Jr.). Milei said that he cloned Conan because he understands cloning as "a way of approaching eternity". To do this, he went to a clinic in the United States: the process cost him about $50,000. He has called his dogs his "four-legged children", and thanked them after his electoral win. Milei commented that one day there was a fire at his building while he was watching TV, which he realized because Conan made for the balcony. He escaped with him using the emergency ladder, and took him to the vet, who gave oxygen to Milei because he was developing symptoms of cyanosis. Milei is an avid fan of association football. Albeit having played for Chacarita Juniors in his early adulthood, he has stated to be a supporter of Boca Juniors; in a 2024 interview with Radio Mitre, Milei said, "I am a member and fan of Boca. If investment groups come and put a fortune for us to win all the time, where do I sign?" However, he has expressed criticism of the presidency of Juan Román Riquelme at the club since 2023, stating that his "management at Boca is a disaster" and referred to Riquelme as "a Kirchnerist running the club". Milei is a huge fan of the English rock band The Rolling Stones. In December 2024, while holding the office of Head of State, Milei applied for and was granted Italian citizenship via jus sanguinis, under the government of Prime Minister Giorgia Meloni. Electoral history Radio Publications References Further reading External links |
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Contents International Network for Social Network Analysis The International Network for Social Network Analysis (INSNA) is a professional academic association of researchers and practitioners of social network analysis. History INSNA was founded in 1977 by Barry Wellman, a sociologist. A key function of the organization was to provide a sense of identity for a set of researchers who were widely dispersed geographically and across scientific disciplines. Shortly after INSNA was founded, Linton C. Freeman founded the association's flagship journal, Social Networks, in 1978. Early meetings were invitation-only, but in 1980 H. Russell Bernard and Alvin Wolfe inaugurated the series of annual "Sunbelt" meetings open to all. A full chronology of INSNA leadership is as follows:[citation needed] As of 2018, INSNA has approximately 1,000 active members, while the SOCNET listserv has about 3700 subscribers. As well as publishing a triannual journal Connections on the subject, INSNA also: See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Black_hole#cite_note-46] | [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 Turn 10 Studios Turn 10 Studios is an American video game developer based in Redmond, Washington. The company was established in 2001 under Microsoft Game Studios (now known as Xbox Game Studios) to develop the Forza Motorsport series for Xbox platforms. The most recent game developed solely by Turn 10 is the eighth Forza Motorsport, released in 2023. History Turn 10 Studios was established in 2001 by Microsoft, under its Microsoft Game Studios division, to develop a series of racing games, which later became known as Forza. At the time of the studio's establishment, most staff had experience in publishing games, such as Project Gotham Racing and Golf 4.0, but had not been involved in game development. In October 2014, the studio employed approximately 100 full-time staff, as well as between 100 and 200 contract workers. In July 2025, 70 roles were eliminated as part of a round of layoffs that affected 9,000 Microsoft employees. It was also reported that development on the Forza Motorsport series had been cancelled and Turn 10 would continue working on the Forza Horizon series alongside Playground Games. Technology Turn 10 develops and uses a proprietary game engine called ForzaTech, and proprietary editor called Fuel that allows multiple artists to work on the same level, primarily those for cars and racing tracks, simultaneously. Games developed References External links |
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Contents ISO 259 ISO 259 is a series of international standards for the romanization of Hebrew characters into Latin characters, dating to 1984, with updated ISO 259-2 (a simplification, disregarding several vowel signs, 1994) and ISO 259-3 (Phonemic Conversion, 1999). ISO 259 ISO 259, dating to the year 1984, is a transliteration of the Hebrew script, including the diacritical signs (niqqud) used for Biblical Hebrew. The dagesh (dot inside the letter) is always transcribed with an overdot: ḃ, ġ, ż, etc. The apostrophe (׳) in the table above is the Hebrew sign geresh used after some letters to write down non-Hebrew sounds: ג׳ [d͡ʒ], ז׳ [ʒ], צ׳ [t͡ʃ], etc. ISO 259-2 ISO 259-2 simplifies the diacritical signs for vowels of ISO 259, and is designed for Modern Hebrew. The dagesh is not transcribed excepted in the indicated cases. The apostrophe (׳) in the table above is the Hebrew sign geresh used after some letters to write down non-Hebrew sounds. ISO 259-3 ISO 259-3 is Uzzi Ornan's romanization, which reached the stage of an ISO Final Draft (FDIS) but not of a published International Standard (IS). It is designed to deliver the common structure of the Hebrew word throughout the different dialects or pronunciation styles of Hebrew, in a way that it can be reconstructed into the original Hebrew characters by both man and machine. It is neither a character-by-character transliteration nor a phonetic transcription of one pronunciation style of Hebrew, but is instead phonemic from the viewpoint that all the different dialects and pronunciations of Hebrew through the generations can be regarded as different realizations of the same structure, and by predefined reading rules every pronunciation style can be directly derived from it. Each consonant character in the Hebrew script is converted into its unique Latin character. ISO 259-3 has five vowel characters, corresponding to the five vowel phonemes of Modern Hebrew: a, e, i, o, u. In addition there is a sixth sign for denoting the vowel /ej/ or /e/ that is written followed by ⟨י⟩ in common Hebrew spelling: ei. The dagesh forte (gemination in Biblical Hebrew) is transcribed with a double consonant. Non-phonemic vowels are ignored, such as: Though the official proposal for ISO-259-3 gives only C/c as the Latin character corresponding to Hebrew צ/ץ, Ornan also provided for its alternate romanization as Ç/ç, even writing in a 2008 paper on the topic that it was his preference, and in an earlier 2003 paper especially recommending the use of Ç/ç for use in the romanization of Hebrew placenames—for example, on Israeli road signs. See also References |
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[SOURCE: https://en.wikipedia.org/wiki/Kiryat_Ekron] | [TOKENS: 448] |
Contents Kiryat Ekron Kiryat Ekron or Qiryath Eqron (Hebrew: קִרְיַת עֶקְרוֹן) is a town located on the coastal plain in the Central District of Israel. Located immediately south of the city of Rehovot on Highway 411 next to the Bilu Junction, in 2023 it had a population of 11,288. History Kiryat Ekron was founded in 1948, as Kfar Ekron, on the site of the Palestinian village of Aqir, and was named after the biblical Ekron, a major Philistine city that is believed to have once existed at nearby Tel Mikne. After the war, new immigrants from Yemen and Bulgaria settled in the remaining houses. In November 1948, two ma'abarot were established on the village's lands; the Aqir ma'abara, and the Givat Brenner ma'abara. In 1953, the Aqir ma'abara was officially made part of Kfar Ekron, followed by the Givat Brenner ma'abara in 1955. From 1954 to 1963, Kfar Ekron belonged to the Givat Brenner regional council. In 1963, the name of the town was changed to Kiryat Ekron, and it became an independent local municipality. Attempts to unite Kiryat Ekron with the much larger municipality of Rehovot in 2003 failed after popular protest from residents of the town, as did similar attempts to unite Kiryat Ekron's municipality with that of the town of Mazkeret Batya due to opposition from the smaller town's residents the same year (Mazkeret Batya was originally called Ekron; its name was changed in 1887). Economy A large outlet mall, "Bilu Centre", is located in Kiryat Ekron. The centre was built up in the late 1990s on land that was formerly agricultural, particularly citrus groves. Notable residents Twin towns Kiryat Ekron is twinned with: References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Orbit_of_Mars] | [TOKENS: 1331] |
Contents Orbit of Mars Mars has an orbit with a semimajor axis of 1.524 astronomical units (228 million km) (12.673 light minutes), and an eccentricity of 0.0934. The planet orbits the Sun in 687 days and travels 9.55 AU in doing so, making the average orbital speed 24 km/s. The eccentricity is greater than that of any other planet except Mercury, and this causes a large difference between the aphelion and perihelion distances—they are respectively 1.666 and 1.381 AU. Changes in the orbit Mars is in the midst of a long-term increase in eccentricity. It reached a minimum of 0.079 about 19 millennia ago, and will peak at about 0.105 after about 24 millennia from now (and with perihelion distances a mere 1.3621 astronomical units). The orbit is at times near circular: it was 0.002 1.35 million years ago, and will reach a similar minimum 1.05 million years into the future.[clarification needed] The maximum eccentricity between those two extreme minima is 0.12 in about 200 thousand years. Oppositions Mars reaches opposition when there is a 180° difference between the geocentric longitudes of it and the Sun. At a time near opposition (within 8½ days) the Earth–Mars distance is as small as it will get during that 780-day synodic period. Every opposition has some significance because Mars is visible from Earth all night, high and fully lit, but the ones of special interest happen when Mars is near perihelion, because this is when Mars is also nearest to Earth. One perihelic opposition is followed by another either 15 or 17 years later. In fact every opposition is followed by a similar one 7 or 8 synodic periods later, and by a very similar one 37 synodic periods (79 years) later. In the so-called perihelic opposition Mars is closest to the Sun and is particularly close to Earth: Oppositions range from about 0.68 AU when Mars is near aphelion to only about 0.37 AU when Mars is near perihelion. Close approaches to Earth Mars comes closer to Earth more than any other planet save Venus at its nearest—56 million km is the closest distance between Mars and Earth, whereas the closest Venus comes to Earth is 40 million km. Mars comes closest to Earth every other year, around the time of its opposition, when Earth is sweeping between the Sun and Mars. Extra-close oppositions of Mars happen every 15 to 17 years, when we pass between Mars and the Sun around the time of its perihelion (closest point to the Sun in orbit). The minimum distance between Earth and Mars has been declining over the years, and in 2003 the minimum distance was 55.76 million km, nearer than any such encounter in almost 60,000 years (57,617 BC). The record minimum distance between Earth and Mars in 2729 will stand at 55.65 million km. In the year 3818, the record will stand at 55.44 million km, and the distances will continue to decrease for about 24,000 years. Historical importance Until the work of Johannes Kepler (1571–1630), a German astronomer, the prevailing belief was that the Sun and planets orbited the Earth. In 1543, Nicolaus Copernicus had proposed that all the planets orbited in circles around the Sun, but his theory did not give very satisfactory predictions and was largely ignored. When Kepler studied his boss Tycho Brahe's observations of Mars's position in the sky on many nights, Kepler realized that Mars's orbit could not be a circle. After years of analysis, Kepler discovered that Mars's orbit was likely to be an ellipse, with the Sun at one of the ellipse's focal points. This, in turn, led to Kepler's discovery that all planets orbit the Sun in elliptical orbits, with the Sun at one of the two focal points. This became the first of Kepler's three laws of planetary motion. Accuracy/predictability From the perspective of all but the most demanding, the path of Mars is simple. An equation in Astronomical Algorithms that assumes an unperturbed elliptical orbit predicts the perihelion and aphelion times with an error of "a few hours". Using orbital elements to calculate those distances agrees to actual averages to at least five significant figures. Formulas for computing position straight from orbital elements typically do not provide or need corrections for the effects of other planets. For a higher level of accuracy the perturbations of planets are required. These are well known, and are believed to be modeled well enough to achieve high accuracy. These are all of the bodies that need to be considered for even many demanding problems. When Aldo Vitagliano calculated the date of close Martian approaches in the distant past or future, he tested the potential effect caused by the uncertainties of the asteroid belt models by running the simulations both with and without the biggest three asteroids, and found the effects were negligible. Observations improved, and space age technology has replaced the older techniques. E. Myles Standish wrote: "Classical ephemerides over the past centuries have been based entirely upon optical observations:almost exclusively, meridian circle transit timings. With the advent of planetary radar, spacecraft missions, VLBI, etc., the situation for the four inner planets has changed dramatically." (8.5.1 page 10) For DE405, created in 1995, optical observations were dropped and as he wrote "initial conditions for the inner four planets were adjusted to ranging data primarily…" The error in DE405 is known to be about 2 km and is now sub-kilometer. Although the perturbations on Mars by asteroids have caused problems, they have also been used to estimate the masses of certain asteroids. But improving the model of the asteroid belt is of great concern to those requiring or attempting to provide the highest-accuracy ephemerides. Orbital parameters No more than five significant figures are presented in the following table of Mars's orbital elements. To this level of precision, the numbers match very well the VSOP87 elements and calculations derived from them, as well as Standish's (of JPL) 250-year best fit, and calculations using the actual positions of Mars over time. References |
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[SOURCE: https://en.wikipedia.org/wiki/PlayStation_(console)#cite_note-217] | [TOKENS: 10728] |
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 Twenty-second government of Israel The twenty-second government of Israel was formed by Yitzhak Shamir of Likud on 20 October 1986. Shamir replaced Shimon Peres of the Alignment as Prime Minister as part of a rotation deal within the national unity coalition between the two parties. The only other change to the coalition was that the one-seat Morasha faction was not included, with the National Religious Party, Agudat Yisrael, Shas, Shinui and Ometz remaining part of the government, although Shinui left on 26 May 1987. The government held office until 22 December 1988, when the twenty-third government was formed, following the November 1988 elections. Cabinet members References External links |
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Contents World's Edge World's Edge is an American video game developer and a studio of Xbox Game Studios based in Redmond, Washington. It was established in June 2019 in order to oversee the Age of Empires franchise. The studio works with external studios such as Forgotten Empires, Tantalus Media and Relic Entertainment to bring back the franchise. History At E3 2019 Xbox announced that they were establishing a new internal studio which was later named World's Edge. The studio was established in 2019 by Shannon Loftis, the former head of publishing at Xbox Game Studios Publishing, to work on the Age of Empires franchise. The studio's first title was Age of Empires II: Definitive Edition, for which they partnered with Forgotten Empires, Tantalus Media and Wicked Witch Software. The studio oversaw the project and kept it on the desired track. Shannon Loftis, the founder and head of the studio, retired in 2022, and Michael Mann, the executive producer of Age of Empires IV, took her place. On the 25th anniversary of Age of Empires, World's Edge announced Xbox console ports of Age of Empires II: Definitive Edition and Age of Empires IV along with a remaster of Age of Mythology and the global version of Age of Empires Mobile. Games developed References |
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Contents Jacob Bekenstein Jacob David Bekenstein (Hebrew: יעקב דוד בקנשטיין; May 1, 1947 – August 16, 2015) was a Mexican-born American-Israeli theoretical physicist who made fundamental contributions to the foundation of black hole thermodynamics and to other aspects of the connections between information and gravitation. Early life and education Jacob Bekenstein was born in Mexico City to Joseph and Esther (née Vladaslavotsky), Polish Jews who immigrated to Mexico. He moved to the United States during his early life, gaining U.S. citizenship in 1968. He was also a citizen of Israel. Bekenstein attended the Polytechnic Institute of Brooklyn, now known as the New York University Tandon School of Engineering, obtaining both an undergraduate degree and a Master of Science degree in 1969. He went on to receive a Doctor of Philosophy degree from Princeton University, working under the direction of John Archibald Wheeler, in 1972. Bekenstein had three children with his wife, Bilha. All three children, Yehonadav,[a] Uriya and Rivka Bekenstein, became scientists. Bekenstein was known as a religious man and a believer, being quoted as saying: "I look at the world as a product of God, He set very specific laws and we delight in discovering them through scientific work." Scientific career By 1972, Bekenstein had published three influential papers about the black hole stellar phenomenon, postulating the no-hair theorem and presenting a theory on black hole thermodynamics. In the years to come, Bekenstein continued his exploration of black holes, publishing papers on their entropy and quantum mass. Bekenstein was a postdoctoral fellow at the University of Texas at Austin from 1972 to 1974. He then immigrated to Israel to lecture and teach at Ben-Gurion University in Beersheba. In 1978, he became a full professor and in 1983, head of the astrophysics department. In 1990, he became a professor at the Hebrew University of Jerusalem and was appointed head of its theoretical physics department three years later. He was elected to the Israel Academy of Sciences and Humanities in 1997. He was a visiting scholar at the Institute for Advanced Study in 2009 and 2010. In addition to lectures and residencies around the world, Bekenstein continued to serve as Polak professor of theoretical physics at the Hebrew University until his death at the age of 68, in Helsinki, Finland. He died unexpectedly on August 16, 2015, just months after receiving the American Physical Society's Einstein Prize "for his ground-breaking work on black hole entropy, which launched the field of black hole thermodynamics and transformed the long effort to unify quantum mechanics and gravitation". He died in Helsinki by falling down a flight of stairs, having refused to turn on the lights on a Shabbat. Contributions to physics In 1972, Bekenstein was the first to suggest that black holes should have a well-defined entropy. He wrote that a black hole's entropy was proportional to the area of its (the black hole's) event horizon. Bekenstein also formulated the generalized second law of thermodynamics, black hole thermodynamics, for systems including black holes. Both contributions were affirmed when Stephen Hawking (and, independently, Zeldovich and others) proposed the existence of Hawking radiation two years later. Hawking had initially opposed Bekenstein's idea on the grounds that a black hole could not radiate energy and therefore could not have entropy. However, in 1974, Hawking performed a lengthy calculation that convinced him that particles can indeed be emitted from black holes. Today this is known as Hawking radiation. Bekenstein's doctoral adviser, John Archibald Wheeler, also worked with him to develop the no-hair theorem, a reference to Wheeler's saying that "black holes have no hair," in the early 1970s. Bekenstein's suggestion was proven unstable, but it was influential in the development of the field. Based on his black-hole thermodynamics work, Bekenstein also demonstrated the Bekenstein bound: there is a maximum to the amount of information that can potentially be stored in a given finite region of space which has a finite amount of energy (which is similar to the holographic principle). In 1982, Bekenstein developed a rigorous framework to generalize the laws of electromagnetism to handle inconstant physical constants. His framework replaces the fine-structure constant by a scalar field. However, this framework for changing constants did not incorporate gravity. In 2004, Bekenstein boosted Mordehai Milgrom's theory of Modified Newtonian Dynamics (MOND) by developing a relativistic version. It is known as TeVeS for Tensor/Vector/Scalar and it introduces three different fields in space time to replace the one gravitational field. Awards and recognition Published works Notes References External links |
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Contents Elon Musk Elon Reeve Musk (/ˈiːlɒn/ EE-lon; born June 28, 1971) is a businessman and entrepreneur known for his leadership of Tesla, SpaceX, Twitter, and xAI. Musk has been the wealthiest person in the world since 2025; as of February 2026,[update] Forbes estimates his net worth to be around US$852 billion. Born into a wealthy family in Pretoria, South Africa, Musk emigrated in 1989 to Canada; he has Canadian citizenship since his mother was born there. He received bachelor's degrees in 1997 from the University of Pennsylvania before moving to California to pursue business ventures. In 1995, Musk co-founded the software company Zip2. Following its sale in 1999, he co-founded X.com, an online payment company that later merged to form PayPal, which was acquired by eBay in 2002. Musk also became an American citizen in 2002. In 2002, Musk founded the space technology company SpaceX, becoming its CEO and chief engineer; the company has since led innovations in reusable rockets and commercial spaceflight. Musk joined the automaker Tesla as an early investor in 2004 and became its CEO and product architect in 2008; it has since become a leader in electric vehicles. In 2015, he co-founded OpenAI to advance artificial intelligence (AI) research, but later left; growing discontent with the organization's direction and their leadership in the AI boom in the 2020s led him to establish xAI, which became a subsidiary of SpaceX in 2026. In 2022, he acquired the social network Twitter, implementing significant changes, and rebranding it as X in 2023. His other businesses include the neurotechnology company Neuralink, which he co-founded in 2016, and the tunneling company the Boring Company, which he founded in 2017. In November 2025, a Tesla pay package worth $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Musk was the largest donor in the 2024 U.S. presidential election, where he supported Donald Trump. After Trump was inaugurated as president in early 2025, Musk served as Senior Advisor to the President and as the de facto head of the Department of Government Efficiency (DOGE). After a public feud with Trump, Musk left the Trump administration and returned to managing his companies. Musk is a supporter of global far-right figures, causes, and political parties. His political activities, views, and statements have made him a polarizing figure. Musk has been criticized for COVID-19 misinformation, promoting conspiracy theories, and affirming antisemitic, racist, and transphobic comments. His acquisition of Twitter was controversial due to a subsequent increase in hate speech and the spread of misinformation on the service, following his pledge to decrease censorship. His role in the second Trump administration attracted public backlash, particularly in response to DOGE. The emails he sent to Jeffrey Epstein are included in the Epstein files, which were published between 2025–26 and became a topic of worldwide debate. Early life Elon Reeve Musk was born on June 28, 1971, in Pretoria, South Africa's administrative capital. He is of British and Pennsylvania Dutch ancestry. His mother, Maye (née Haldeman), is a model and dietitian born in Saskatchewan, Canada, and raised in South Africa. Musk therefore holds both South African and Canadian citizenship from birth. His father, Errol Musk, is a South African electromechanical engineer, pilot, sailor, consultant, emerald dealer, and property developer, who partly owned a rental lodge at Timbavati Private Nature Reserve. His maternal grandfather, Joshua N. Haldeman, who died in a plane crash when Elon was a toddler, was an American-born Canadian chiropractor, aviator and political activist in the technocracy movement who moved to South Africa in 1950. Elon has a younger brother, Kimbal, a younger sister, Tosca, and four paternal half-siblings. Musk was baptized as a child in the Anglican Church of Southern Africa. Despite both Elon and Errol previously stating that Errol was a part owner of a Zambian emerald mine, in 2023, Errol recounted that the deal he made was to receive "a portion of the emeralds produced at three small mines". Errol was elected to the Pretoria City Council as a representative of the anti-apartheid Progressive Party and has said that his children shared their father's dislike of apartheid. After his parents divorced in 1979, Elon, aged around 9, chose to live with his father because Errol Musk had an Encyclopædia Britannica and a computer. Elon later regretted his decision and became estranged from his father. Elon has recounted trips to a wilderness school that he described as a "paramilitary Lord of the Flies" where "bullying was a virtue" and children were encouraged to fight over rations. In one incident, after an altercation with a fellow pupil, Elon was thrown down concrete steps and beaten severely, leading to him being hospitalized for his injuries. Elon described his father berating him after he was discharged from the hospital. Errol denied berating Elon and claimed, "The [other] boy had just lost his father to suicide, and Elon had called him stupid. Elon had a tendency to call people stupid. How could I possibly blame that child?" Elon was an enthusiastic reader of books, and had attributed his success in part to having read The Lord of the Rings, the Foundation series, and The Hitchhiker's Guide to the Galaxy. At age ten, he developed an interest in computing and video games, teaching himself how to program from the VIC-20 user manual. At age twelve, Elon sold his BASIC-based game Blastar to PC and Office Technology magazine for approximately $500 (equivalent to $1,600 in 2025). Musk attended Waterkloof House Preparatory School, Bryanston High School, and then Pretoria Boys High School, where he graduated. Musk was a decent but unexceptional student, earning a 61/100 in Afrikaans and a B on his senior math certification. Musk applied for a Canadian passport through his Canadian-born mother to avoid South Africa's mandatory military service, which would have forced him to participate in the apartheid regime, as well as to ease his path to immigration to the United States. While waiting for his application to be processed, he attended the University of Pretoria for five months. Musk arrived in Canada in June 1989, connected with a second cousin in Saskatchewan, and worked odd jobs, including at a farm and a lumber mill. In 1990, he entered Queen's University in Kingston, Ontario. Two years later, he transferred to the University of Pennsylvania, where he studied until 1995. Although Musk has said that he earned his degrees in 1995, the University of Pennsylvania did not award them until 1997 – a Bachelor of Arts in physics and a Bachelor of Science in economics from the university's Wharton School. He reportedly hosted large, ticketed house parties to help pay for tuition, and wrote a business plan for an electronic book-scanning service similar to Google Books. In 1994, Musk held two internships in Silicon Valley: one at energy storage startup Pinnacle Research Institute, which investigated electrolytic supercapacitors for energy storage, and another at Palo Alto–based startup Rocket Science Games. In 1995, he was accepted to a graduate program in materials science at Stanford University, but did not enroll. Musk decided to join the Internet boom of the 1990s, applying for a job at Netscape, to which he reportedly never received a response. The Washington Post reported that Musk lacked legal authorization to remain and work in the United States after failing to enroll at Stanford. In response, Musk said he was allowed to work at that time and that his student visa transitioned to an H1-B. According to numerous former business associates and shareholders, Musk said he was on a student visa at the time. Business career In 1995, Musk, his brother Kimbal, and Greg Kouri founded the web software company Zip2 with funding from a group of angel investors. They housed the venture at a small rented office in Palo Alto. Replying to Rolling Stone, Musk denounced the notion that they started their company with funds borrowed from Errol Musk, but in a tweet, he recognized that his father contributed 10% of a later funding round. The company developed and marketed an Internet city guide for the newspaper publishing industry, with maps, directions, and yellow pages. According to Musk, "The website was up during the day and I was coding it at night, seven days a week, all the time." To impress investors, Musk built a large plastic structure around a standard computer to create the impression that Zip2 was powered by a small supercomputer. The Musk brothers obtained contracts with The New York Times and the Chicago Tribune, and persuaded the board of directors to abandon plans for a merger with CitySearch. Musk's attempts to become CEO were thwarted by the board. Compaq acquired Zip2 for $307 million in cash in February 1999 (equivalent to $590,000,000 in 2025), and Musk received $22 million (equivalent to $43,000,000 in 2025) for his 7-percent share. In 1999, Musk co-founded X.com, an online financial services and e-mail payment company. The startup was one of the first federally insured online banks, and, in its initial months of operation, over 200,000 customers joined the service. The company's investors regarded Musk as inexperienced and replaced him with Intuit CEO Bill Harris by the end of the year. The following year, X.com merged with online bank Confinity to avoid competition. Founded by Max Levchin and Peter Thiel, Confinity had its own money-transfer service, PayPal, which was more popular than X.com's service. Within the merged company, Musk returned as CEO. Musk's preference for Microsoft software over Unix created a rift in the company and caused Thiel to resign. Due to resulting technological issues and lack of a cohesive business model, the board ousted Musk and replaced him with Thiel in 2000.[b] Under Thiel, the company focused on the PayPal service and was renamed PayPal in 2001. In 2002, PayPal was acquired by eBay for $1.5 billion (equivalent to $2,700,000,000 in 2025) in stock, of which Musk—the largest shareholder with 11.72% of shares—received $175.8 million (equivalent to $320,000,000 in 2025). In 2017, Musk purchased the domain X.com from PayPal for an undisclosed amount, stating that it had sentimental value. In 2001, Musk became involved with the nonprofit Mars Society and discussed funding plans to place a growth-chamber for plants on Mars. Seeking a way to launch the greenhouse payloads into space, Musk made two unsuccessful trips to Moscow to purchase intercontinental ballistic missiles (ICBMs) from Russian companies NPO Lavochkin and Kosmotras. Musk instead decided to start a company to build affordable rockets. With $100 million of his early fortune, (equivalent to $180,000,000 in 2025) Musk founded SpaceX in May 2002 and became the company's CEO and Chief Engineer. SpaceX attempted its first launch of the Falcon 1 rocket in 2006. Although the rocket failed to reach Earth orbit, it was awarded a Commercial Orbital Transportation Services program contract from NASA, then led by Mike Griffin. After two more failed attempts that nearly caused Musk to go bankrupt, SpaceX succeeded in launching the Falcon 1 into orbit in 2008. Later that year, SpaceX received a $1.6 billion NASA contract (equivalent to $2,400,000,000 in 2025) for Falcon 9-launched Dragon spacecraft flights to the International Space Station (ISS), replacing the Space Shuttle after its 2011 retirement. In 2012, the Dragon vehicle docked with the ISS, a first for a commercial spacecraft. Working towards its goal of reusable rockets, in 2015 SpaceX successfully landed the first stage of a Falcon 9 on a land platform. Later landings were achieved on autonomous spaceport drone ships, an ocean-based recovery platform. In 2018, SpaceX launched the Falcon Heavy; the inaugural mission carried Musk's personal Tesla Roadster as a dummy payload. Since 2019, SpaceX has been developing Starship, a reusable, super heavy-lift launch vehicle intended to replace the Falcon 9 and Falcon Heavy. In 2020, SpaceX launched its first crewed flight, the Demo-2, becoming the first private company to place astronauts into orbit and dock a crewed spacecraft with the ISS. In 2024, NASA awarded SpaceX an $843 million (equivalent to $865,000,000 in 2025) contract to build a spacecraft that NASA will use to deorbit the ISS at the end of its lifespan. In 2015, SpaceX began development of the Starlink constellation of low Earth orbit satellites to provide satellite Internet access. After the launch of prototype satellites in 2018, the first large constellation was deployed in May 2019. As of May 2025[update], over 7,600 Starlink satellites are operational, comprising 65% of all operational Earth satellites. The total cost of the decade-long project to design, build, and deploy the constellation was estimated by SpaceX in 2020 to be $10 billion (equivalent to $12,000,000,000 in 2025).[c] During the Russian invasion of Ukraine, Musk provided free Starlink service to Ukraine, permitting Internet access and communication at a yearly cost to SpaceX of $400 million (equivalent to $440,000,000 in 2025). However, Musk refused to block Russian state media on Starlink. In 2023, Musk denied Ukraine's request to activate Starlink over Crimea to aid an attack against the Russian navy, citing fears of a nuclear response. Tesla, Inc., originally Tesla Motors, was incorporated in July 2003 by Martin Eberhard and Marc Tarpenning. Both men played active roles in the company's early development prior to Musk's involvement. Musk led the Series A round of investment in February 2004; he invested $6.35 million (equivalent to $11,000,000 in 2025), became the majority shareholder, and joined Tesla's board of directors as chairman. Musk took an active role within the company and oversaw Roadster product design, but was not deeply involved in day-to-day business operations. Following a series of escalating conflicts in 2007 and the 2008 financial crisis, Eberhard was ousted from the firm.[page needed] Musk assumed leadership of the company as CEO and product architect in 2008. A 2009 lawsuit settlement with Eberhard designated Musk as a Tesla co-founder, along with Tarpenning and two others. Tesla began delivery of the Roadster, an electric sports car, in 2008. With sales of about 2,500 vehicles, it was the first mass production all-electric car to use lithium-ion battery cells. Under Musk, Tesla has since launched several well-selling electric vehicles, including the four-door sedan Model S (2012), the crossover Model X (2015), the mass-market sedan Model 3 (2017), the crossover Model Y (2020), and the pickup truck Cybertruck (2023). In May 2020, Musk resigned as chairman of the board as part of the settlement of a lawsuit from the SEC over him tweeting that funding had been "secured" for potentially taking Tesla private. The company has also constructed multiple lithium-ion battery and electric vehicle factories, called Gigafactories. Since its initial public offering in 2010, Tesla stock has risen significantly; it became the most valuable carmaker in summer 2020, and it entered the S&P 500 later that year. In October 2021, it reached a market capitalization of $1 trillion (equivalent to $1,200,000,000,000 in 2025), the sixth company in U.S. history to do so. Musk provided the initial concept and financial capital for SolarCity, which his cousins Lyndon and Peter Rive founded in 2006. By 2013, SolarCity was the second largest provider of solar power systems in the United States. In 2014, Musk promoted the idea of SolarCity building an advanced production facility in Buffalo, New York, triple the size of the largest solar plant in the United States. Construction of the factory started in 2014 and was completed in 2017. It operated as a joint venture with Panasonic until early 2020. Tesla acquired SolarCity for $2 billion in 2016 (equivalent to $2,700,000,000 in 2025) and merged it with its battery unit to create Tesla Energy. The deal's announcement resulted in a more than 10% drop in Tesla's stock price; at the time, SolarCity was facing liquidity issues. Multiple shareholder groups filed a lawsuit against Musk and Tesla's directors, stating that the purchase of SolarCity was done solely to benefit Musk and came at the expense of Tesla and its shareholders. Tesla directors settled the lawsuit in January 2020, leaving Musk the sole remaining defendant. Two years later, the court ruled in Musk's favor. In 2016, Musk co-founded Neuralink, a neurotechnology startup, with an investment of $100 million. Neuralink aims to integrate the human brain with artificial intelligence (AI) by creating devices that are embedded in the brain. Such technology could enhance memory or allow the devices to communicate with software. The company also hopes to develop devices to treat neurological conditions like spinal cord injuries. In 2022, Neuralink announced that clinical trials would begin by the end of the year. In September 2023, the Food and Drug Administration approved Neuralink to initiate six-year human trials. Neuralink has conducted animal testing on macaques at the University of California, Davis. In 2021, the company released a video in which a macaque played the video game Pong via a Neuralink implant. The company's animal trials—which have caused the deaths of some monkeys—have led to claims of animal cruelty. The Physicians Committee for Responsible Medicine has alleged that Neuralink violated the Animal Welfare Act. Employees have complained that pressure from Musk to accelerate development has led to botched experiments and unnecessary animal deaths. In 2022, a federal probe was launched into possible animal welfare violations by Neuralink.[needs update] In 2017, Musk founded the Boring Company to construct tunnels; he also revealed plans for specialized, underground, high-occupancy vehicles that could travel up to 150 miles per hour (240 km/h) and thus circumvent above-ground traffic in major cities. Early in 2017, the company began discussions with regulatory bodies and initiated construction of a 30-foot (9.1 m) wide, 50-foot (15 m) long, and 15-foot (4.6 m) deep "test trench" on the premises of SpaceX's offices, as that required no permits. The Los Angeles tunnel, less than two miles (3.2 km) in length, debuted to journalists in 2018. It used Tesla Model Xs and was reported to be a rough ride while traveling at suboptimal speeds. Two tunnel projects announced in 2018, in Chicago and West Los Angeles, have been canceled. A tunnel beneath the Las Vegas Convention Center was completed in early 2021. Local officials have approved further expansions of the tunnel system. April 14, 2022 In early 2017, Musk expressed interest in buying Twitter and had questioned the platform's commitment to freedom of speech. By 2022, Musk had reached 9.2% stake in the company, making him the largest shareholder.[d] Musk later agreed to a deal that would appoint him to Twitter's board of directors and prohibit him from acquiring more than 14.9% of the company. Days later, Musk made a $43 billion offer to buy Twitter. By the end of April Musk had successfully concluded his bid for approximately $44 billion. This included approximately $12.5 billion in loans and $21 billion in equity financing. Having backtracked on his initial decision, Musk bought the company on October 27, 2022. Immediately after the acquisition, Musk fired several top Twitter executives including CEO Parag Agrawal; Musk became the CEO instead. Under Elon Musk, Twitter instituted monthly subscriptions for a "blue check", and laid off a significant portion of the company's staff. Musk lessened content moderation and hate speech also increased on the platform after his takeover. In late 2022, Musk released internal documents relating to Twitter's moderation of Hunter Biden's laptop controversy in the lead-up to the 2020 presidential election. Musk also promised to step down as CEO after a Twitter poll, and five months later, Musk stepped down as CEO and transitioned his role to executive chairman and chief technology officer (CTO). Despite Musk stepping down as CEO, X continues to struggle with challenges such as viral misinformation, hate speech, and antisemitism controversies. Musk has been accused of trying to silence some of his critics such as Twitch streamer Asmongold, who criticized him during one of his streams. Musk has been accused of removing their accounts' blue checkmarks, which hinders visibility and is considered a form of shadow banning, or suspending their accounts without justification. Other activities In August 2013, Musk announced plans for a version of a vactrain, and assigned engineers from SpaceX and Tesla to design a transport system between Greater Los Angeles and the San Francisco Bay Area, at an estimated cost of $6 billion. Later that year, Musk unveiled the concept, dubbed the Hyperloop, intended to make travel cheaper than any other mode of transport for such long distances. In December 2015, Musk co-founded OpenAI, a not-for-profit artificial intelligence (AI) research company aiming to develop artificial general intelligence, intended to be safe and beneficial to humanity. Musk pledged $1 billion of funding to the company, and initially gave $50 million. In 2018, Musk left the OpenAI board. Since 2018, OpenAI has made significant advances in machine learning. In July 2023, Musk launched the artificial intelligence company xAI, which aims to develop a generative AI program that competes with existing offerings like OpenAI's ChatGPT. Musk obtained funding from investors in SpaceX and Tesla, and xAI hired engineers from Google and OpenAI. December 16, 2022 Musk uses a private jet owned by Falcon Landing LLC, a SpaceX-linked company, and acquired a second jet in August 2020. His heavy use of the jets and the consequent fossil fuel usage have received criticism. Musk's flight usage is tracked on social media through ElonJet. In December 2022, Musk banned the ElonJet account on Twitter, and made temporary bans on the accounts of journalists that posted stories regarding the incident, including Donie O'Sullivan, Keith Olbermann, and journalists from The New York Times, The Washington Post, CNN, and The Intercept. In October 2025, Musk's company xAI launched Grokipedia, an AI-generated online encyclopedia that he promoted as an alternative to Wikipedia. Articles on Grokipedia are generated and reviewed by xAI's Grok chatbot. Media coverage and academic analysis described Grokipedia as frequently reusing Wikipedia content but framing contested political and social topics in line with Musk's own views and right-wing narratives. A study by Cornell University researchers and NBC News stated that Grokipedia cites sources that are blacklisted or considered "generally unreliable" on Wikipedia, for example, the conspiracy site Infowars and the neo-Nazi forum Stormfront. Wired, The Guardian and Time criticized Grokipedia for factual errors and for presenting Musk himself in unusually positive terms while downplaying controversies. Politics Musk is an outlier among business leaders who typically avoid partisan political advocacy. Musk was a registered independent voter when he lived in California. Historically, he has donated to both Democrats and Republicans, many of whom serve in states in which he has a vested interest. Since 2022, his political contributions have mostly supported Republicans, with his first vote for a Republican going to Mayra Flores in the 2022 Texas's 34th congressional district special election. In 2024, he started supporting international far-right political parties, activists, and causes, and has shared misinformation and numerous conspiracy theories. Since 2024, his views have been generally described as right-wing. Musk supported Barack Obama in 2008 and 2012, Hillary Clinton in 2016, Joe Biden in 2020, and Donald Trump in 2024. In the 2020 Democratic Party presidential primaries, Musk endorsed candidate Andrew Yang and expressed support for Yang's proposed universal basic income, and endorsed Kanye West's 2020 presidential campaign. In 2021, Musk publicly expressed opposition to the Build Back Better Act, a $3.5 trillion legislative package endorsed by Joe Biden that ultimately failed to pass due to unanimous opposition from congressional Republicans and several Democrats. In 2022, gave over $50 million to Citizens for Sanity, a conservative political action committee. In 2023, he supported Republican Ron DeSantis for the 2024 U.S. presidential election, giving $10 million to his campaign, and hosted DeSantis's campaign announcement on a Twitter Spaces event. From June 2023 to January 2024, Musk hosted a bipartisan set of X Spaces with Republican and Democratic candidates, including Robert F. Kennedy Jr., Vivek Ramaswamy, and Dean Phillips. In October 2025, former vice-president Kamala Harris commented that it was a mistake from the Democratic side to not invite Musk to a White House electric vehicle event organized in August 2021 and featuring executives from General Motors, Ford and Stellantis, despite Tesla being "the major American manufacturer of extraordinary innovation in this space." Fortune remarked that this was a nod to United Auto Workers and organized labor. Harris said presidents should put aside political loyalties when it came to recognizing innovation, and guessed that the non-invitation impacted Musk's perspective. Fortune noted that, at the time, Musk said, "Yeah, seems odd that Tesla wasn't invited." A month later, he criticized Biden as "not the friendliest administration." Jacob Silverman, author of the book Gilded Rage: Elon Musk and the Radicalization of Silicon Valley, said that the tech industry represented by Musk, Thiel, Andreessen and other capitalists, actually flourished under Biden, but the tech leaders chose Trump for their common ground on cultural issues. By early 2024, Musk had become a vocal and financial supporter of Donald Trump. In July 2024, minutes after the attempted assassination of Donald Trump, Musk endorsed him for president saying; "I fully endorse President Trump and hope for his rapid recovery." During the presidential campaign, Musk joined Trump on stage at a campaign rally, and during the campaign promoted conspiracy theories and falsehoods about Democrats, election fraud and immigration, in support of Trump. Musk was the largest individual donor of the 2024 election. In 2025, Musk contributed $19 million to the Wisconsin Supreme Court race, hoping to influence the state's future redistricting efforts and its regulations governing car manufacturers and dealers. In 2023, Musk said he shunned the World Economic Forum because it was boring. The organization commented that they had not invited him since 2015. He has participated in Dialog, dubbed "Tech Bilderberg" and organized by Peter Thiel and Auren Hoffman, though. Musk's international political actions and comments have come under increasing scrutiny and criticism, especially from the governments and leaders of France, Germany, Norway, Spain and the United Kingdom, particularly due to his position in the U.S. government as well as ownership of X. An NBC News analysis found he had boosted far-right political movements to cut immigration and curtail regulation of business in at least 18 countries on six continents since 2023. During his speech after the second inauguration of Donald Trump, Musk twice made a gesture interpreted by many as a Nazi or a fascist Roman salute.[e] He thumped his right hand over his heart, fingers spread wide, and then extended his right arm out, emphatically, at an upward angle, palm down and fingers together. He then repeated the gesture to the crowd behind him. As he finished the gestures, he said to the crowd, "My heart goes out to you. It is thanks to you that the future of civilization is assured." It was widely condemned as an intentional Nazi salute in Germany, where making such gestures is illegal. The Anti-Defamation League said it was not a Nazi salute, but other Jewish organizations disagreed and condemned the salute. American public opinion was divided on partisan lines as to whether it was a fascist salute. Musk dismissed the accusations of Nazi sympathies, deriding them as "dirty tricks" and a "tired" attack. Neo-Nazi and white supremacist groups celebrated it as a Nazi salute. Multiple European political parties demanded that Musk be banned from entering their countries. The concept of DOGE emerged in a discussion between Musk and Donald Trump, and in August 2024, Trump committed to giving Musk an advisory role, with Musk accepting the offer. In November and December 2024, Musk suggested that the organization could help to cut the U.S. federal budget, consolidate the number of federal agencies, and eliminate the Consumer Financial Protection Bureau, and that its final stage would be "deleting itself". In January 2025, the organization was created by executive order, and Musk was designated a "special government employee". Musk led the organization and was a senior advisor to the president, although his official role is not clear. In sworn statement during a lawsuit, the director of the White House Office of Administration stated that Musk "is not an employee of the U.S. DOGE Service or U.S. DOGE Service Temporary Organization", "is not the U.S. DOGE Service administrator", and has "no actual or formal authority to make government decisions himself". Trump said two days later that he had put Musk in charge of DOGE. A federal judge has ruled that Musk acted as the de facto leader of DOGE. Musk's role in the second Trump administration, particularly in response to DOGE, has attracted public backlash. He was criticized for his treatment of federal government employees, including his influence over the mass layoffs of the federal workforce. He has prioritized secrecy within the organization and has accused others of violating privacy laws. A Senate report alleged that Musk could avoid up to $2 billion in legal liability as a result of DOGE's actions. In May 2025, Bill Gates accused Musk of "killing the world's poorest children" through his cuts to USAID, which modeling by Boston University estimated had resulted in 300,000 deaths by this time, most of them of children. By November 2025, the estimated death toll had increased to 400,000 children and 200,000 adults. Musk announced on May 28, 2025, that he would depart from the Trump administration as planned when the special government employee's 130 day deadline expired, with a White House official confirming that Musk's offboarding from the Trump administration was already underway. His departure was officially confirmed during a joint Oval Office press conference with Trump on May 30, 2025. @realDonaldTrump is in the Epstein files. That is the real reason they have not been made public. June 5, 2025 After leaving office, Musk criticized the Trump administration's Big Beautiful Bill, calling it a "disgusting abomination" due to its provisions increasing the deficit. A feud began between Musk and Trump, with its most notable event being Musk alleging Trump had ties to sex offender Jeffrey Epstein on X (formerly Twitter) on June 5, 2025. Trump responded on Truth Social stating that Musk went "CRAZY" after the "EV Mandate" was purportedly taken away and threatened to cut Musk's government contracts. Musk then called for a third Trump impeachment. The next day, Trump stated that he did not wish to reconcile with Musk, and added that Musk would face "very serious consequences" if he funds Democratic candidates. On June 11, Musk publicly apologized for the tweets against Trump, saying they "went too far". Views November 6, 2022 Rejecting the conservative label, Musk has described himself as a political moderate, even as his views have become more right-wing over time. His views have been characterized as libertarian and far-right, and after his involvement in European politics, they have received criticism from world leaders such as Emmanuel Macron and Olaf Scholz. Within the context of American politics, Musk supported Democratic candidates up until 2022, at which point he voted for a Republican for the first time. He has stated support for universal basic income, gun rights, freedom of speech, a tax on carbon emissions, and H-1B visas. Musk has expressed concern about issues such as artificial intelligence (AI) and climate change, and has been a critic of wealth tax, short-selling, and government subsidies. An immigrant himself, Musk has been accused of being anti-immigration, and regularly blames immigration policies for illegal immigration. He is also a pronatalist who believes population decline is the biggest threat to civilization, and identifies as a cultural Christian. Musk has long been an advocate for space colonization, especially the colonization of Mars. He has repeatedly pushed for humanity colonizing Mars, in order to become an interplanetary species and lower the risks of human extinction. Musk has promoted conspiracy theories and made controversial statements that have led to accusations of racism, sexism, antisemitism, transphobia, disseminating disinformation, and support of white pride. While describing himself as a "pro-Semite", his comments regarding George Soros and Jewish communities have been condemned by the Anti-Defamation League and the Biden White House. Musk was criticized during the COVID-19 pandemic for making unfounded epidemiological claims, defying COVID-19 lockdowns restrictions, and supporting the Canada convoy protest against vaccine mandates. He has amplified false claims of white genocide in South Africa. Musk has been critical of Israel's actions in the Gaza Strip during the Gaza war, praised China's economic and climate goals, suggested that Taiwan and China should resolve cross-strait relations, and was described as having a close relationship with the Chinese government. In Europe, Musk expressed support for Ukraine in 2022 during the Russian invasion, recommended referendums and peace deals on the annexed Russia-occupied territories, and supported the far-right Alternative for Germany political party in 2024. Regarding British politics, Musk blamed the 2024 UK riots on mass migration and open borders, criticized Prime Minister Keir Starmer for what he described as a "two-tier" policing system, and was subsequently attacked as being responsible for spreading misinformation and amplifying the far-right. He has also voiced his support for far-right activist Tommy Robinson and pledged electoral support for Reform UK. In February 2026, Musk described Spanish Prime Minister Pedro Sánchez as a "tyrant" following Sánchez's proposal to prohibit minors under the age of 16 from accessing social media platforms. Legal affairs In 2018, Musk was sued by the U.S. Securities and Exchange Commission (SEC) for a tweet stating that funding had been secured for potentially taking Tesla private.[f] The securities fraud lawsuit characterized the tweet as false, misleading, and damaging to investors, and sought to bar Musk from serving as CEO of publicly traded companies. Two days later, Musk settled with the SEC, without admitting or denying the SEC's allegations. As a result, Musk and Tesla were fined $20 million each, and Musk was forced to step down for three years as Tesla chairman but was able to remain as CEO. Shareholders filed a lawsuit over the tweet, and in February 2023, a jury found Musk and Tesla not liable. Musk has stated in interviews that he does not regret posting the tweet that triggered the SEC investigation. In 2019, Musk stated in a tweet that Tesla would build half a million cars that year. The SEC reacted by asking a court to hold him in contempt for violating the terms of the 2018 settlement agreement. A joint agreement between Musk and the SEC eventually clarified the previous agreement details, including a list of topics about which Musk needed preclearance. In 2020, a judge blocked a lawsuit that claimed a tweet by Musk regarding Tesla stock price ("too high imo") violated the agreement. Freedom of Information Act (FOIA)-released records showed that the SEC concluded Musk had subsequently violated the agreement twice by tweeting regarding "Tesla's solar roof production volumes and its stock price". In October 2023, the SEC sued Musk over his refusal to testify a third time in an investigation into whether he violated federal law by purchasing Twitter stock in 2022. In February 2024, Judge Laurel Beeler ruled that Musk must testify again. In January 2025, the SEC filed a lawsuit against Musk for securities violations related to his purchase of Twitter. In January 2024, Delaware judge Kathaleen McCormick ruled in a 2018 lawsuit that Musk's $55 billion pay package from Tesla be rescinded. McCormick called the compensation granted by the company's board "an unfathomable sum" that was unfair to shareholders. The Delaware Supreme Court overturned McCormick's decision in December 2025, restoring Musk's compensation package and awarding $1 in nominal damages. Personal life Musk became a U.S. citizen in 2002. From the early 2000s until late 2020, Musk resided in California, where both Tesla and SpaceX were founded. He then relocated to Cameron County, Texas, saying that California had become "complacent" about its economic success. While hosting Saturday Night Live in 2021, Musk stated that he has Asperger syndrome (an outdated term for autism spectrum disorder). When asked about his experience growing up with Asperger's syndrome in a TED2022 conference in Vancouver, Musk stated that "the social cues were not intuitive ... I would just tend to take things very literally ... but then that turned out to be wrong — [people were not] simply saying exactly what they mean, there's all sorts of other things that are meant, and [it] took me a while to figure that out." Musk suffers from back pain and has undergone several spine-related surgeries, including a disc replacement. In 2000, he contracted a severe case of malaria while on vacation in South Africa. Musk has stated he uses doctor-prescribed ketamine for occasional depression and that he doses "a small amount once every other week or something like that"; since January 2024, some media outlets have reported that he takes ketamine, marijuana, LSD, ecstasy, mushrooms, cocaine and other drugs. Musk at first refused to comment on his alleged drug use, before responding that he had not tested positive for drugs, and that if drugs somehow improved his productivity, "I would definitely take them!". The New York Times' investigations revealed Musk's overuse of ketamine and numerous other drugs, as well as strained family relationships and concerns from close associates who have become troubled by his public behavior as he became more involved in political activities and government work. According to The Washington Post, President Trump described Musk as "a big-time drug addict". Through his own label Emo G Records, Musk released a rap track, "RIP Harambe", on SoundCloud in March 2019. The following year, he released an EDM track, "Don't Doubt Ur Vibe", featuring his own lyrics and vocals. Musk plays video games, which he stated has a "'restoring effect' that helps his 'mental calibration'". Some games he plays include Quake, Diablo IV, Elden Ring, and Polytopia. Musk once claimed to be one of the world's top video game players but has since admitted to "account boosting", or cheating by hiring outside services to achieve top player rankings. Musk has justified the boosting by claiming that all top accounts do it so he has to as well to remain competitive. In 2024 and 2025, Musk criticized the video game Assassin's Creed Shadows and its creator Ubisoft for "woke" content. Musk posted to X that "DEI kills art" and specified the inclusion of the historical figure Yasuke in the Assassin's Creed game as offensive; he also called the game "terrible". Ubisoft responded by saying that Musk's comments were "just feeding hatred" and that they were focused on producing a game not pushing politics. Musk has fathered at least 14 children, one of whom died as an infant. The Wall Street Journal reported in 2025 that sources close to Musk suggest that the "true number of Musk's children is much higher than publicly known". He had six children with his first wife, Canadian author Justine Wilson, whom he met while attending Queen's University in Ontario, Canada; they married in 2000. In 2002, their first child Nevada Musk died of sudden infant death syndrome at the age of 10 weeks. After his death, the couple used in vitro fertilization (IVF) to continue their family; they had twins in 2004, followed by triplets in 2006. The couple divorced in 2008 and have shared custody of their children. The elder twin he had with Wilson came out as a trans woman and, in 2022, officially changed her name to Vivian Jenna Wilson, adopting her mother's surname because she no longer wished to be associated with Musk. Musk began dating English actress Talulah Riley in 2008. They married two years later at Dornoch Cathedral in Scotland. In 2012, the couple divorced, then remarried the following year. After briefly filing for divorce in 2014, Musk finalized a second divorce from Riley in 2016. Musk then dated the American actress Amber Heard for several months in 2017; he had reportedly been "pursuing" her since 2012. In 2018, Musk and Canadian musician Grimes confirmed they were dating. Grimes and Musk have three children, born in 2020, 2021, and 2022.[g] Musk and Grimes originally gave their eldest child the name "X Æ A-12", which would have violated California regulations as it contained characters that are not in the modern English alphabet; the names registered on the birth certificate are "X" as a first name, "Æ A-Xii" as a middle name, and "Musk" as a last name. They received criticism for choosing a name perceived to be impractical and difficult to pronounce; Musk has said the intended pronunciation is "X Ash A Twelve". Their second child was born via surrogacy. Despite the pregnancy, Musk confirmed reports that the couple were "semi-separated" in September 2021; in an interview with Time in December 2021, he said he was single. In October 2023, Grimes sued Musk over parental rights and custody of X Æ A-Xii. Elon Musk has taken X Æ A-Xii to multiple official events in Washington, D.C. during Trump's second term in office. Also in July 2022, The Wall Street Journal reported that Musk allegedly had an affair with Nicole Shanahan, the wife of Google co-founder Sergey Brin, in 2021, leading to their divorce the following year. Musk denied the report. Musk also had a relationship with Australian actress Natasha Bassett, who has been described as "an occasional girlfriend". In October 2024, The New York Times reported Musk bought a Texas compound for his children and their mothers, though Musk denied having done so. Musk also has four children with Shivon Zilis, director of operations and special projects at Neuralink: twins born via IVF in 2021, a child born in 2024 via surrogacy and a child born in 2025.[h] On February 14, 2025, Ashley St. Clair, an influencer and author, posted on X claiming to have given birth to Musk's son Romulus five months earlier, which media outlets reported as Musk's supposed thirteenth child.[i] On February 22, 2025, it was reported that St Clair had filed for sole custody of her five-month-old son and for Musk to be recognised as the child's father. On March 31, 2025, Musk wrote that, while he was unsure if he was the father of St. Clair's child, he had paid St. Clair $2.5 million and would continue paying her $500,000 per year.[j] Later reporting from the Wall Street Journal indicated that $1 million of these payments to St. Clair were structured as a loan. In 2014, Musk and Ghislaine Maxwell appeared together in a photograph taken at an Academy Awards after-party, which Musk later described as a "photobomb". The January 2026 Epstein files contain emails between Musk and Epstein from 2012 to 2013, after Epstein's first conviction. Emails released on January 30, 2026, indicated that Epstein invited Musk to visit his private island on multiple occasions. The correspondence showed that while Epstein repeatedly encouraged Musk to attend, Musk did not visit the island. In one instance, Musk discussed the possibility of attending a party with his then-wife Talulah Riley and asked which day would be the "wildest party"; according to the emails, the visit did not take place after Epstein later cancelled the plans.[k] On Christmas day in 2012, Musk emailed Epstein asking "Do you have any parties planned? I’ve been working to the edge of sanity this year and so, once my kids head home after Christmas, I really want to hit the party scene in St Barts or elsewhere and let loose. The invitation is much appreciated, but a peaceful island experience is the opposite of what I’m looking for". Epstein replied that the "ratio on my island" might make Musk's wife uncomfortable to which Musk responded, "Ratio is not a problem for Talulah". On September 11, 2013, Epstein sent an email asking Musk if he had any plans for coming to New York for the opening of the United Nations General Assembly where many "interesting people" would be coming to his house to which Musk responded that "Flying to NY to see UN diplomats do nothing would be an unwise use of time". Epstein responded by stating "Do you think i am retarded. Just kidding, there is no one over 25 and all very cute." Musk has denied any close relationship with Epstein and described him as a "creep" who attempted to ingratiate himself with influential people. When Musk was asked in 2019 if he introduced Epstein to Mark Zuckerberg, Musk responded: "I don’t recall introducing Epstein to anyone, as I don’t know the guy well enough to do so." The released emails nonetheless showed cordial exchanges on a range of topics, including Musk's inquiry about parties on the island. The correspondence also indicated that Musk suggested hosting Epstein at SpaceX, while Epstein separately discussed plans to tour SpaceX and bring "the girls", though there is no evidence that such a visit occurred. Musk has described the release of the files a "distraction", later accusing the second Trump administration of suppressing them to protect powerful individuals, including Trump himself.[l] Wealth Elon Musk is the wealthiest person in the world, with an estimated net worth of US$690 billion as of January 2026, according to the Bloomberg Billionaires Index, and $852 billion according to Forbes, primarily from his ownership stakes in SpaceX and Tesla. Having been first listed on the Forbes Billionaires List in 2012, around 75% of Musk's wealth was derived from Tesla stock in November 2020, although he describes himself as "cash poor". According to Forbes, he became the first person in the world to achieve a net worth of $300 billion in 2021; $400 billion in December 2024; $500 billion in October 2025; $600 billion in mid-December 2025; $700 billion later that month; and $800 billion in February 2026. In November 2025, a Tesla pay package worth potentially $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Public image Although his ventures have been highly influential within their separate industries starting in the 2000s, Musk only became a public figure in the early 2010s. He has been described as an eccentric who makes spontaneous and impactful decisions, while also often making controversial statements, contrary to other billionaires who prefer reclusiveness to protect their businesses. Musk's actions and his expressed views have made him a polarizing figure. Biographer Ashlee Vance described people's opinions of Musk as polarized due to his "part philosopher, part troll" persona on Twitter. He has drawn denouncement for using his platform to mock the self-selection of personal pronouns, while also receiving praise for bringing international attention to matters like British survivors of grooming gangs. Musk has been described as an American oligarch due to his extensive influence over public discourse, social media, industry, politics, and government policy. After Trump's re-election, Musk's influence and actions during the transition period and the second presidency of Donald Trump led some to call him "President Musk", the "actual president-elect", "shadow president" or "co-president". Awards for his contributions to the development of the Falcon rockets include the American Institute of Aeronautics and Astronautics George Low Transportation Award in 2008, the Fédération Aéronautique Internationale Gold Space Medal in 2010, and the Royal Aeronautical Society Gold Medal in 2012. In 2015, he received an honorary doctorate in engineering and technology from Yale University and an Institute of Electrical and Electronics Engineers Honorary Membership. Musk was elected a Fellow of the Royal Society (FRS) in 2018.[m] In 2022, Musk was elected to the National Academy of Engineering. Time has listed Musk as one of the most influential people in the world in 2010, 2013, 2018, and 2021. Musk was selected as Time's "Person of the Year" for 2021. Then Time editor-in-chief Edward Felsenthal wrote that, "Person of the Year is a marker of influence, and few individuals have had more influence than Musk on life on Earth, and potentially life off Earth too." Notes References Works cited Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/S_Ori_70] | [TOKENS: 628] |
Contents S Ori 70 S Ori 70 or S Ori J053810.1-023626 is a mid-T type astronomical object in the foreground of the σ Orionis cluster, which is approximately 1,150 light-years from Earth. It was discovered on November 24, 2002 by M. R. Zapatero-Osorio and E. L. Martin's team at the Roque de los Muchachos Observatory. It has yet to be determined if it is a field brown dwarf or a 3-million-year-old planet that is part of a cluster. Near-infrared spectroscopy images taken three years after its discovery led to the first motion measurements for the object. Its behavior is significantly different from what may be expected; it was further described as either a low-gravity atmosphere or an atmosphere with metallicity. The object's small proper motion suggests that it is further away than expected if it were a single field T dwarf. Discovery The σ Orionis open cluster has been the focus of Osorio's team observations due to the age of the cluster (approximately 3 to 8 million years). The cluster also has low extinction, its distance is convenient, and it is observed to be rich and dense. Using the 4.2-meter (170-inch) William Herschel Telescope in a pencil-beam deep mini-survey measuring 55 square minutes of arc at a sensitivity of 21 magnitudes in the J and H Bands allowed the team to find S Ori 70. The raw data collected was reduced to IRAF (an acronym for Image Reduction and Analysis Facility), a standard technique used with near-infrared images; after subtracting the sky background and dark current, an extracted object spectrum was derived. It was the faintest and coolest member found in the cluster and was named S Ori 70. Adam J. Burgasser examined the claims of Osorio's T-type brown dwarf discovery and its spectroscopically verified low-mass. A comparison of the J band spectrum between S Ori 70 and other field objects was done. The J band spectrum revealed a distinct triangular-shaped spectral morphology which was previously explained by Zapatero-Osorio and Martín was due to the surface's low gravity. In order to see if similar discrepancies occurred in the T dwarf's behavior, Burgasser's team compared data from the claims of Osorio to that of standard COND models. Identical wavelength scales interpolated through both empirical and model spectra were Gaussian smoothed; this showed that best-fit spectral models can yield skewed gravities for late-type field T dwarfs which resulted in the underestimation of age and mass. Burgasser concluded that S Ori 70 is not a member of the Sigma Ori cluster but is rather a foreground field brown dwarf. Further study of the object suggest that the low gravity was not from the field T dwarf but rather a nearby background star. As of 2009 no direct scientific data have dispelled nor confirmed either conclusion. It could be the first "free floating" non-stellar planet discovered with a mass of 3 MJ, but needs confirmation. See also References |
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[SOURCE: https://en.wikipedia.org/wiki/User_(computing)] | [TOKENS: 872] |
Contents User (computing) Page version status This is an accepted version of this page A user is a person who uses a computer or network service. A user typically has a user account and is recognized by the system through a username.[a] Some software products provide services to other systems and have no direct end users. End user End users are the ultimate human users (also referred to as operators) of a software product. The end user stands in contrast to users who support or maintain the product such as sysops, database administrators and computer technicians. The term is used to abstract and distinguish those who only use the software from the developers of the system, who enhance the software for end users. In user-centered design, it also distinguishes the software operator from the client who pays for its development and other stakeholders who may not directly use the software, but help establish its requirements. This abstraction is primarily useful in designing the user interface, and refers to a relevant subset of characteristics that most expected users would have in common. In user-centered design, personas are created to represent the types of users. It is sometimes specified for each persona which types of user interfaces it is comfortable with (due to previous experience or the interface's inherent simplicity), and what technical expertise and degree of knowledge it has in specific fields or disciplines. When few constraints are imposed on the end-user category, especially when designing programs for use by the general public, it is common practice to expect minimal technical expertise or previous training in end users. The end-user development discipline blurs the typical distinction between users and developers. It designates activities or techniques in which people who are not professional developers create automated behavior and complex data objects without significant knowledge of a programming language. Systems whose actor is another system or a software agent have no direct end users. User account A user's account allows a user to authenticate to a system and potentially to receive authorization to access resources provided by or connected to that system; however, authentication does not imply authorization. To log into an account, a user is typically required to authenticate oneself with a password or other credentials for the purposes of accounting, security, logging, and resource management. Once the user has logged on, the operating system will often use an identifier such as an integer to refer to them, rather than their username, through a process known as identity correlation. In Unix systems, the username is correlated with a user identifier or user ID. Computer systems operate in one of two types based on what kind of users they have: Each user account on a multi-user system typically has a home directory, in which to store files pertaining exclusively to that user's activities, which is protected from access by other users (though a system administrator may have access). User accounts often contain a public user profile, which contains basic information provided by the account's owner. The files stored in the home directory (and all other directories in the system) have file system permissions which are inspected by the operating system to determine which users are granted access to read or execute a file, or to store a new file in that directory. While systems expect most user accounts to be used by only a single person, many systems have a special account intended to allow anyone to use the system, such as the username "anonymous" for anonymous FTP and the username "guest" for a guest account. On Unix systems, local user accounts are stored in the file /etc/passwd, while user passwords may be stored at /etc/shadow in its hashed form. On Microsoft Windows, user passwords can be managed within the Credential Manager program.[better source needed] The passwords are located in the Windows profile directory. Various computer operating-systems and applications expect/enforce different rules for the format. In Microsoft Windows environments, for example, note the potential use of: Terminology Some usability professionals have expressed their dislike of the term "user" and have proposed changing it. Don Norman stated that "One of the horrible words we use is 'users'. I am on a crusade to get rid of the word 'users'. I would prefer to call them 'people'." The term "user" may imply lack of the technical expertise required to fully understand how computer systems and software products work. Power users use advanced features of programs, though they are not necessarily capable of computer programming and system administration. See also Notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Mazkeret_Batya] | [TOKENS: 633] |
Contents Mazkeret Batya Mazkeret Batya (Hebrew: מַזְכֶּרֶת בַּתְיָה) (lit. "Batya Memorial") is a local council in central Israel located southeast of Rehovot and 25 kilometres (16 mi) from Tel Aviv. Mazkeret Batya spans an area of 7,440 dunams (7 km2). In 2023 it had a population of 16,382. The mayor of Mazkeret Batya is Gaby Gaon. History Mazkeret Batya, initially Ekron, was established on November 7, 1883 by 11 ultra-Orthodox Jewish farmers from Russia, one of them Yaakov Laskovsky. It was the first agricultural settlement of the Hovevei Zion movement. The land was purchased by Baron Rothschild to promote Jewish agriculture in Israel. Rabbi Shmuel Mohilever was instrumental in mobilizing funding. Mohilever's remains were later reinterred in the Mazkeret Batya cemetery. In 1887 the name was changed to Mazkeret Batya, in memory of Betty Solomon de Rothschild, mother of Baron Edmond James de Rothschild. The history of the founding is described in the book "Rebels in the Holy Land", by the historian Sam Finkle where he writes about the community's struggle to uphold the laws of the sabbatical year despite fierce opposition. The economy of the village was originally based on dry farming, which continued even after the Mekorot Company constructed a pipeline to bring water from Rehovot. In 1918, Mazkeret Batya had a population of 316 people. In 1947, Mazkeret Batya was home to 475 people. According to a census conducted in 1922 by the British Mandate authorities, Mazkeret Batya (then Ekron) had a population 368 Jews. During the Mandate era, a Jewish police station was established in Mazkeret Batya to safeguard the local roads. In the War of Independence, convoys to besieged Jerusalem left from Mazkeret Batya. A field hospital operated there to care for Haganah fighters wounded at Latrun. According to one source, at the end of the British Mandate for Palestine, the British tried to hand the nearby Aqir airfield and camp to the Palestinian Arabs, apparently without success. Due to its proximity to Tel Aviv, Mazkeret Batya has experienced a growth spurt, becoming a mixed community of religious and secular Jews. Historic landmarks include Beit Ha'Itut (Signal House), the Great Synagogue, Beit Meshek HaBaron ("The Baron's Farmhouse", now housing a cultural center), the saqiya-type water-rising system with its wooden wheels, well and pool, and an old farmyard. Notable people Shira Elinav, footballer Twin towns — sister cities Mazkeret Batya is twinned with: References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Meta_Platforms#cite_note-95] | [TOKENS: 8626] |
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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[SOURCE: https://en.wikipedia.org/wiki/Animal#cite_note-159] | [TOKENS: 6011] |
Contents Animal Animals are multicellular, eukaryotic organisms belonging to the biological kingdom Animalia (/ˌænɪˈmeɪliə/). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. Animals form a clade, meaning that they arose from a single common ancestor. Over 1.5 million living animal species have been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft). They have complex ecologies and interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology, and the study of animal behaviour is known as ethology. The animal kingdom is divided into five major clades, namely Porifera, Ctenophora, Placozoa, Cnidaria and Bilateria. Most living animal species belong to the clade Bilateria, a highly proliferative clade whose members have a bilaterally symmetric and significantly cephalised body plan, and the vast majority of bilaterians belong to two large clades: the protostomes, which includes organisms such as arthropods, molluscs, flatworms, annelids and nematodes; and the deuterostomes, which include echinoderms, hemichordates and chordates, the latter of which contains the vertebrates. The much smaller basal phylum Xenacoelomorpha have an uncertain position within Bilateria. Animals first appeared in the fossil record in the late Cryogenian period and diversified in the subsequent Ediacaran period in what is known as the Avalon explosion. Nearly all modern animal phyla first appeared in the fossil record as marine species during the Cambrian explosion, which began around 539 million years ago (Mya), and most classes during the Ordovician radiation 485.4 Mya. Common to all living animals, 6,331 groups of genes have been identified that may have arisen from a single common ancestor that lived about 650 Mya during the Cryogenian period. Historically, Aristotle divided animals into those with blood and those without. Carl Linnaeus created the first hierarchical biological classification for animals in 1758 with his Systema Naturae, which Jean-Baptiste Lamarck expanded into 14 phyla by 1809. In 1874, Ernst Haeckel divided the animal kingdom into the multicellular Metazoa (now synonymous with Animalia) and the Protozoa, single-celled organisms no longer considered animals. In modern times, the biological classification of animals relies on advanced techniques, such as molecular phylogenetics, which are effective at demonstrating the evolutionary relationships between taxa. Humans make use of many other animal species for food (including meat, eggs, and dairy products), for materials (such as leather, fur, and wool), as pets and as working animals for transportation, and services. Dogs, the first domesticated animal, have been used in hunting, in security and in warfare, as have horses, pigeons and birds of prey; while other terrestrial and aquatic animals are hunted for sports, trophies or profits. Non-human animals are also an important cultural element of human evolution, having appeared in cave arts and totems since the earliest times, and are frequently featured in mythology, religion, arts, literature, heraldry, politics, and sports. Etymology The word animal comes from the Latin noun animal of the same meaning, which is itself derived from Latin animalis 'having breath or soul'. The biological definition includes all members of the kingdom Animalia. In colloquial usage, the term animal is often used to refer only to nonhuman animals. The term metazoa is derived from Ancient Greek μετα meta 'after' (in biology, the prefix meta- stands for 'later') and ζῷᾰ zōia 'animals', plural of ζῷον zōion 'animal'. A metazoan is any member of the group Metazoa. Characteristics Animals have several characteristics that they share with other living things. Animals are eukaryotic, multicellular, and aerobic, as are plants and fungi. Unlike plants and algae, which produce their own food, animals cannot produce their own food, a feature they share with fungi. Animals ingest organic material and digest it internally. Animals have structural characteristics that set them apart from all other living things: Typically, there is an internal digestive chamber with either one opening (in Ctenophora, Cnidaria, and flatworms) or two openings (in most bilaterians). Animal development is controlled by Hox genes, which signal the times and places to develop structures such as body segments and limbs. During development, the animal extracellular matrix forms a relatively flexible framework upon which cells can move about and be reorganised into specialised tissues and organs, making the formation of complex structures possible, and allowing cells to be differentiated. The extracellular matrix may be calcified, forming structures such as shells, bones, and spicules. In contrast, the cells of other multicellular organisms (primarily algae, plants, and fungi) are held in place by cell walls, and so develop by progressive growth. Nearly all animals make use of some form of sexual reproduction. They produce haploid gametes by meiosis; the smaller, motile gametes are spermatozoa and the larger, non-motile gametes are ova. These fuse to form zygotes, which develop via mitosis into a hollow sphere, called a blastula. In sponges, blastula larvae swim to a new location, attach to the seabed, and develop into a new sponge. In most other groups, the blastula undergoes more complicated rearrangement. It first invaginates to form a gastrula with a digestive chamber and two separate germ layers, an external ectoderm and an internal endoderm. In most cases, a third germ layer, the mesoderm, also develops between them. These germ layers then differentiate to form tissues and organs. Repeated instances of mating with a close relative during sexual reproduction generally leads to inbreeding depression within a population due to the increased prevalence of harmful recessive traits. Animals have evolved numerous mechanisms for avoiding close inbreeding. Some animals are capable of asexual reproduction, which often results in a genetic clone of the parent. This may take place through fragmentation; budding, such as in Hydra and other cnidarians; or parthenogenesis, where fertile eggs are produced without mating, such as in aphids. Ecology Animals are categorised into ecological groups depending on their trophic levels and how they consume organic material. Such groupings include carnivores (further divided into subcategories such as piscivores, insectivores, ovivores, etc.), herbivores (subcategorised into folivores, graminivores, frugivores, granivores, nectarivores, algivores, etc.), omnivores, fungivores, scavengers/detritivores, and parasites. Interactions between animals of each biome form complex food webs within that ecosystem. In carnivorous or omnivorous species, predation is a consumer–resource interaction where the predator feeds on another organism, its prey, who often evolves anti-predator adaptations to avoid being fed upon. Selective pressures imposed on one another lead to an evolutionary arms race between predator and prey, resulting in various antagonistic/competitive coevolutions. Almost all multicellular predators are animals. Some consumers use multiple methods; for example, in parasitoid wasps, the larvae feed on the hosts' living tissues, killing them in the process, but the adults primarily consume nectar from flowers. Other animals may have very specific feeding behaviours, such as hawksbill sea turtles which mainly eat sponges. Most animals rely on biomass and bioenergy produced by plants and phytoplanktons (collectively called producers) through photosynthesis. Herbivores, as primary consumers, eat the plant material directly to digest and absorb the nutrients, while carnivores and other animals on higher trophic levels indirectly acquire the nutrients by eating the herbivores or other animals that have eaten the herbivores. Animals oxidise carbohydrates, lipids, proteins and other biomolecules in cellular respiration, which allows the animal to grow and to sustain basal metabolism and fuel other biological processes such as locomotion. Some benthic animals living close to hydrothermal vents and cold seeps on the dark sea floor consume organic matter produced through chemosynthesis (via oxidising inorganic compounds such as hydrogen sulfide) by archaea and bacteria. Animals originated in the ocean; all extant animal phyla, except for Micrognathozoa and Onychophora, feature at least some marine species. However, several lineages of arthropods begun to colonise land around the same time as land plants, probably between 510 and 471 million years ago, during the Late Cambrian or Early Ordovician. Vertebrates such as the lobe-finned fish Tiktaalik started to move on to land in the late Devonian, about 375 million years ago. Other notable animal groups that colonized land environments are Mollusca, Platyhelmintha, Annelida, Tardigrada, Onychophora, Rotifera, Nematoda. Animals occupy virtually all of earth's habitats and microhabitats, with faunas adapted to salt water, hydrothermal vents, fresh water, hot springs, swamps, forests, pastures, deserts, air, and the interiors of other organisms. Animals are however not particularly heat tolerant; very few of them can survive at constant temperatures above 50 °C (122 °F) or in the most extreme cold deserts of continental Antarctica. The collective global geomorphic influence of animals on the processes shaping the Earth's surface remains largely understudied, with most studies limited to individual species and well-known exemplars. Diversity The blue whale (Balaenoptera musculus) is the largest animal that has ever lived, weighing up to 190 tonnes and measuring up to 33.6 metres (110 ft) long. The largest extant terrestrial animal is the African bush elephant (Loxodonta africana), weighing up to 12.25 tonnes and measuring up to 10.67 metres (35.0 ft) long. The largest terrestrial animals that ever lived were titanosaur sauropod dinosaurs such as Argentinosaurus, which may have weighed as much as 73 tonnes, and Supersaurus which may have reached 39 metres. Several animals are microscopic; some Myxozoa (obligate parasites within the Cnidaria) never grow larger than 20 μm, and one of the smallest species (Myxobolus shekel) is no more than 8.5 μm when fully grown. The following table lists estimated numbers of described extant species for the major animal phyla, along with their principal habitats (terrestrial, fresh water, and marine), and free-living or parasitic ways of life. Species estimates shown here are based on numbers described scientifically; much larger estimates have been calculated based on various means of prediction, and these can vary wildly. For instance, around 25,000–27,000 species of nematodes have been described, while published estimates of the total number of nematode species include 10,000–20,000; 500,000; 10 million; and 100 million. Using patterns within the taxonomic hierarchy, the total number of animal species—including those not yet described—was calculated to be about 7.77 million in 2011.[a] 3,000–6,500 4,000–25,000 Evolutionary origin Evidence of animals is found as long ago as the Cryogenian period. 24-Isopropylcholestane (24-ipc) has been found in rocks from roughly 650 million years ago; it is only produced by sponges and pelagophyte algae. Its likely origin is from sponges based on molecular clock estimates for the origin of 24-ipc production in both groups. Analyses of pelagophyte algae consistently recover a Phanerozoic origin, while analyses of sponges recover a Neoproterozoic origin, consistent with the appearance of 24-ipc in the fossil record. The first body fossils of animals appear in the Ediacaran, represented by forms such as Charnia and Spriggina. It had long been doubted whether these fossils truly represented animals, but the discovery of the animal lipid cholesterol in fossils of Dickinsonia establishes their nature. Animals are thought to have originated under low-oxygen conditions, suggesting that they were capable of living entirely by anaerobic respiration, but as they became specialised for aerobic metabolism they became fully dependent on oxygen in their environments. Many animal phyla first appear in the fossil record during the Cambrian explosion, starting about 539 million years ago, in beds such as the Burgess Shale. Extant phyla in these rocks include molluscs, brachiopods, onychophorans, tardigrades, arthropods, echinoderms and hemichordates, along with numerous now-extinct forms such as the predatory Anomalocaris. The apparent suddenness of the event may however be an artefact of the fossil record, rather than showing that all these animals appeared simultaneously. That view is supported by the discovery of Auroralumina attenboroughii, the earliest known Ediacaran crown-group cnidarian (557–562 mya, some 20 million years before the Cambrian explosion) from Charnwood Forest, England. It is thought to be one of the earliest predators, catching small prey with its nematocysts as modern cnidarians do. Some palaeontologists have suggested that animals appeared much earlier than the Cambrian explosion, possibly as early as 1 billion years ago. Early fossils that might represent animals appear for example in the 665-million-year-old rocks of the Trezona Formation of South Australia. These fossils are interpreted as most probably being early sponges. Trace fossils such as tracks and burrows found in the Tonian period (from 1 gya) may indicate the presence of triploblastic worm-like animals, roughly as large (about 5 mm wide) and complex as earthworms. However, similar tracks are produced by the giant single-celled protist Gromia sphaerica, so the Tonian trace fossils may not indicate early animal evolution. Around the same time, the layered mats of microorganisms called stromatolites decreased in diversity, perhaps due to grazing by newly evolved animals. Objects such as sediment-filled tubes that resemble trace fossils of the burrows of wormlike animals have been found in 1.2 gya rocks in North America, in 1.5 gya rocks in Australia and North America, and in 1.7 gya rocks in Australia. Their interpretation as having an animal origin is disputed, as they might be water-escape or other structures. Phylogeny Animals are monophyletic, meaning they are derived from a common ancestor. Animals are the sister group to the choanoflagellates, with which they form the Choanozoa. Ros-Rocher and colleagues (2021) trace the origins of animals to unicellular ancestors, providing the external phylogeny shown in the cladogram. Uncertainty of relationships is indicated with dashed lines. The animal clade had certainly originated by 650 mya, and may have come into being as much as 800 mya, based on molecular clock evidence for different phyla. Holomycota (inc. fungi) Ichthyosporea Pluriformea Filasterea The relationships at the base of the animal tree have been debated. Other than Ctenophora, the Bilateria and Cnidaria are the only groups with symmetry, and other evidence shows they are closely related. In addition to sponges, Placozoa has no symmetry and was often considered a "missing link" between protists and multicellular animals. The presence of hox genes in Placozoa shows that they were once more complex. The Porifera (sponges) have long been assumed to be sister to the rest of the animals, but there is evidence that the Ctenophora may be in that position. Molecular phylogenetics has supported both the sponge-sister and ctenophore-sister hypotheses. In 2017, Roberto Feuda and colleagues, using amino acid differences, presented both, with the following cladogram for the sponge-sister view that they supported (their ctenophore-sister tree simply interchanging the places of ctenophores and sponges): Porifera Ctenophora Placozoa Cnidaria Bilateria Conversely, a 2023 study by Darrin Schultz and colleagues uses ancient gene linkages to construct the following ctenophore-sister phylogeny: Ctenophora Porifera Placozoa Cnidaria Bilateria Sponges are physically very distinct from other animals, and were long thought to have diverged first, representing the oldest animal phylum and forming a sister clade to all other animals. Despite their morphological dissimilarity with all other animals, genetic evidence suggests sponges may be more closely related to other animals than the comb jellies are. Sponges lack the complex organisation found in most other animal phyla; their cells are differentiated, but in most cases not organised into distinct tissues, unlike all other animals. They typically feed by drawing in water through pores, filtering out small particles of food. The Ctenophora and Cnidaria are radially symmetric and have digestive chambers with a single opening, which serves as both mouth and anus. Animals in both phyla have distinct tissues, but these are not organised into discrete organs. They are diploblastic, having only two main germ layers, ectoderm and endoderm. The tiny placozoans have no permanent digestive chamber and no symmetry; they superficially resemble amoebae. Their phylogeny is poorly defined, and under active research. The remaining animals, the great majority—comprising some 29 phyla and over a million species—form the Bilateria clade, which have a bilaterally symmetric body plan. The Bilateria are triploblastic, with three well-developed germ layers, and their tissues form distinct organs. The digestive chamber has two openings, a mouth and an anus, and in the Nephrozoa there is an internal body cavity, a coelom or pseudocoelom. These animals have a head end (anterior) and a tail end (posterior), a back (dorsal) surface and a belly (ventral) surface, and a left and a right side. A modern consensus phylogenetic tree for the Bilateria is shown below. Xenacoelomorpha Ambulacraria Chordata Ecdysozoa Spiralia Having a front end means that this part of the body encounters stimuli, such as food, favouring cephalisation, the development of a head with sense organs and a mouth. Many bilaterians have a combination of circular muscles that constrict the body, making it longer, and an opposing set of longitudinal muscles, that shorten the body; these enable soft-bodied animals with a hydrostatic skeleton to move by peristalsis. They also have a gut that extends through the basically cylindrical body from mouth to anus. Many bilaterian phyla have primary larvae which swim with cilia and have an apical organ containing sensory cells. However, over evolutionary time, descendant spaces have evolved which have lost one or more of each of these characteristics. For example, adult echinoderms are radially symmetric (unlike their larvae), while some parasitic worms have extremely simplified body structures. Genetic studies have considerably changed zoologists' understanding of the relationships within the Bilateria. Most appear to belong to two major lineages, the protostomes and the deuterostomes. It is often suggested that the basalmost bilaterians are the Xenacoelomorpha, with all other bilaterians belonging to the subclade Nephrozoa. However, this suggestion has been contested, with other studies finding that xenacoelomorphs are more closely related to Ambulacraria than to other bilaterians. Protostomes and deuterostomes differ in several ways. Early in development, deuterostome embryos undergo radial cleavage during cell division, while many protostomes (the Spiralia) undergo spiral cleavage. Animals from both groups possess a complete digestive tract, but in protostomes the first opening of the embryonic gut develops into the mouth, and the anus forms secondarily. In deuterostomes, the anus forms first while the mouth develops secondarily. Most protostomes have schizocoelous development, where cells simply fill in the interior of the gastrula to form the mesoderm. In deuterostomes, the mesoderm forms by enterocoelic pouching, through invagination of the endoderm. The main deuterostome taxa are the Ambulacraria and the Chordata. Ambulacraria are exclusively marine and include acorn worms, starfish, sea urchins, and sea cucumbers. The chordates are dominated by the vertebrates (animals with backbones), which consist of fishes, amphibians, reptiles, birds, and mammals. The protostomes include the Ecdysozoa, named after their shared trait of ecdysis, growth by moulting, Among the largest ecdysozoan phyla are the arthropods and the nematodes. The rest of the protostomes are in the Spiralia, named for their pattern of developing by spiral cleavage in the early embryo. Major spiralian phyla include the annelids and molluscs. History of classification In the classical era, Aristotle divided animals,[d] based on his own observations, into those with blood (roughly, the vertebrates) and those without. The animals were then arranged on a scale from man (with blood, two legs, rational soul) down through the live-bearing tetrapods (with blood, four legs, sensitive soul) and other groups such as crustaceans (no blood, many legs, sensitive soul) down to spontaneously generating creatures like sponges (no blood, no legs, vegetable soul). Aristotle was uncertain whether sponges were animals, which in his system ought to have sensation, appetite, and locomotion, or plants, which did not: he knew that sponges could sense touch and would contract if about to be pulled off their rocks, but that they were rooted like plants and never moved about. In 1758, Carl Linnaeus created the first hierarchical classification in his Systema Naturae. In his original scheme, the animals were one of three kingdoms, divided into the classes of Vermes, Insecta, Pisces, Amphibia, Aves, and Mammalia. Since then, the last four have all been subsumed into a single phylum, the Chordata, while his Insecta (which included the crustaceans and arachnids) and Vermes have been renamed or broken up. The process was begun in 1793 by Jean-Baptiste de Lamarck, who called the Vermes une espèce de chaos ('a chaotic mess')[e] and split the group into three new phyla: worms, echinoderms, and polyps (which contained corals and jellyfish). By 1809, in his Philosophie Zoologique, Lamarck had created nine phyla apart from vertebrates (where he still had four phyla: mammals, birds, reptiles, and fish) and molluscs, namely cirripedes, annelids, crustaceans, arachnids, insects, worms, radiates, polyps, and infusorians. In his 1817 Le Règne Animal, Georges Cuvier used comparative anatomy to group the animals into four embranchements ('branches' with different body plans, roughly corresponding to phyla), namely vertebrates, molluscs, articulated animals (arthropods and annelids), and zoophytes (radiata) (echinoderms, cnidaria and other forms). This division into four was followed by the embryologist Karl Ernst von Baer in 1828, the zoologist Louis Agassiz in 1857, and the comparative anatomist Richard Owen in 1860. In 1874, Ernst Haeckel divided the animal kingdom into two subkingdoms: Metazoa (multicellular animals, with five phyla: coelenterates, echinoderms, articulates, molluscs, and vertebrates) and Protozoa (single-celled animals), including a sixth animal phylum, sponges. The protozoa were later moved to the former kingdom Protista, leaving only the Metazoa as a synonym of Animalia. In human culture The human population exploits a large number of other animal species for food, both of domesticated livestock species in animal husbandry and, mainly at sea, by hunting wild species. Marine fish of many species are caught commercially for food. A smaller number of species are farmed commercially. Humans and their livestock make up more than 90% of the biomass of all terrestrial vertebrates, and almost as much as all insects combined. Invertebrates including cephalopods, crustaceans, insects—principally bees and silkworms—and bivalve or gastropod molluscs are hunted or farmed for food, fibres. Chickens, cattle, sheep, pigs, and other animals are raised as livestock for meat across the world. Animal fibres such as wool and silk are used to make textiles, while animal sinews have been used as lashings and bindings, and leather is widely used to make shoes and other items. Animals have been hunted and farmed for their fur to make items such as coats and hats. Dyestuffs including carmine (cochineal), shellac, and kermes have been made from the bodies of insects. Working animals including cattle and horses have been used for work and transport from the first days of agriculture. Animals such as the fruit fly Drosophila melanogaster serve a major role in science as experimental models. Animals have been used to create vaccines since their discovery in the 18th century. Some medicines such as the cancer drug trabectedin are based on toxins or other molecules of animal origin. People have used hunting dogs to help chase down and retrieve animals, and birds of prey to catch birds and mammals, while tethered cormorants have been used to catch fish. Poison dart frogs have been used to poison the tips of blowpipe darts. A wide variety of animals are kept as pets, from invertebrates such as tarantulas, octopuses, and praying mantises, reptiles such as snakes and chameleons, and birds including canaries, parakeets, and parrots all finding a place. However, the most kept pet species are mammals, namely dogs, cats, and rabbits. There is a tension between the role of animals as companions to humans, and their existence as individuals with rights of their own. A wide variety of terrestrial and aquatic animals are hunted for sport. The signs of the Western and Chinese zodiacs are based on animals. In China and Japan, the butterfly has been seen as the personification of a person's soul, and in classical representation the butterfly is also the symbol of the soul. Animals have been the subjects of art from the earliest times, both historical, as in ancient Egypt, and prehistoric, as in the cave paintings at Lascaux. Major animal paintings include Albrecht Dürer's 1515 The Rhinoceros, and George Stubbs's c. 1762 horse portrait Whistlejacket. Insects, birds and mammals play roles in literature and film, such as in giant bug movies. Animals including insects and mammals feature in mythology and religion. The scarab beetle was sacred in ancient Egypt, and the cow is sacred in Hinduism. Among other mammals, deer, horses, lions, bats, bears, and wolves are the subjects of myths and worship. See also Notes References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Philosophie_Zoologique] | [TOKENS: 2446] |
Contents Philosophie zoologique Philosophie zoologique ("Zoological Philosophy, or Exposition with Regard to the Natural History of Animals") is an 1809 book by the French naturalist Jean-Baptiste Lamarck, in which he outlines his pre-Darwinian theory of evolution, part of which is now known as Lamarckism. In the book, Lamarck named two supposed laws that would enable animal species to acquire characteristics under the influence of the environment. The first law stated that use or disuse would cause body structures to grow or shrink over the generations. The second law asserted that such changes would be inherited. Those conditions together imply that species continuously change by adaptation to their environments, forming a branching series of evolutionary paths. Lamarck was largely ignored by the major French zoologist Cuvier, but he attracted much more interest abroad. The book was read carefully, but its thesis rejected, by nineteenth century scientists including the geologist Charles Lyell and the comparative anatomist Thomas Henry Huxley. Charles Darwin acknowledged Lamarck as an important zoologist, and his theory a forerunner of Darwin's evolution by natural selection. Context Jean-Baptiste Lamarck (1744–1829) was a member of the French Academy of Sciences and a professor of botany at the Jardin des Plantes and then became the first professor of zoology at the new Muséum national d'Histoire naturelle. He became known for his work on the taxonomy of the invertebrates, especially of molluscs. However, he is mainly remembered for the theory that now bears his name, Lamarckism, and in particular his view that the environment (called by Lamarck the conditions of life) gave rise to permanent, inherited, evolutionary changes in animals. He described his theory in his 1802 Recherches sur l'organisation des corps vivants, and in his 1809 Philosophie zoologique, and later in his Histoire naturelle des animaux sans vertèbres, (1815–1822). Book In the Philosophie zoologique, Lamarck proposed that species could acquire new characteristics from influences in their environment, in two rules that he named as laws. His first law stated that use or disuse of a body's structures would cause them to grow or shrink in the course of several generations. His second law held that any changes made in this way would be inherited. Together, Lamarck's laws imply the steady adaptation of animals to their environments. He gave names to a number of vestigial structures in the book, among them "Olivier's Spalax, which lives underground like the mole, and is apparently exposed to daylight even less than the mole, has altogether lost the use of sight: so that it shows nothing more than vestiges of this organ." Lamarck described speciation as follows: as new modifications will necessarily continue to operate, however slowly, not only will there continually be found new species, new genera, and new orders, but each species will vary in some part of its structure and form ... individuals which from special causes are transported into very different situations from those where the others occur, and then constantly submitted to other influences – the former, I say, assume new forms, and then they constitute a new species. He argued that gaps between differing kinds of animals resulted from the extinction of intermediate forms, in: a branching series, irregularly graduated which has no discontinuity in its parts, or which, at least, if it's true that there are some because of lost species, has not always had such. It follows that the species that terminate each branch of the general series are related, at least on one side, to the other neighboring species that shade into them. Lamarck proposed the transmutation of species ("transformisme"), but did not believe that all living things shared a common ancestor. Rather he believed that simple forms of life were created continuously by spontaneous generation. He also believed that an innate life force, which he sometimes described as a nervous fluid, drove species to become more complex over time, advancing up a linear ladder of complexity similar to the mediaeval great chain of being. Contents The first volume concerns natural history, the second physiology, and the third psychology. Page numbers are given in parentheses. Avertissement (I–XXV) Discours Préliminaire (1) (Considérations sur l'Histoire naturelle des Animaux, leurs caractères, leurs rapports, leur organisation, leur distribution, leur classification et leur espèces) I. Des Parties de l'art dans les productions de la Nature (17) II. Importance des Rapports (39) III. De l'Espèce parmi les Corps vivans, et de l'idée que nous devons attacher à ce mot (53) IV. Généralités sur les Animaux (82) V. Sur l'Etat actuel de la Distribution et de la Classification des Animaux (102) VI. Dégradation et simplification de l'organisation d'une extrémité a l'autre de la Chaîne animale (130) VII. De l'influence des Circonstances sur les actions et les habitudes des Animaux, et de celle des actions et des habitudes de ces Corps vivans, comme causes qui modifient leur organisation et leurs parties (218) VIII. De l'Ordre naturel des Animaux et de la disposition qu'il faut donner a leur distribution generale pour la rendre conforme a l'ordre meme de la nature (269) (Considerations sur les Causes physiques de la Vie, les conditions qu'elle exige pour exister, la force excitatrice de ses mouvemens, les facultes qu'elle donne aux corps qui la possedent, et les resultats de son existence dans les corps)(359) Introduction (359) I. Comparison des Corps inorganiques avec les Corps vivans, suivie d'un Parallele entre les Animaux et les Vegetaux (377) II. De la Vie, de ce qui la constitue, et des Conditions essentielles a son existence dans un corps (400) III. De la cause excitatrice des mouvemens organiques (1) IV. De l'orgasme et de l'irritabilité (20) V. Du tissu cellulaire, considere comme la gangue dans laquelle toute organisation a ete formee (46) VI. Des generations directes ou spontanees (61) VII. Des resultats immediats de la vie dans un corps (91) VIII. Des facultes communes a tous les corps vivans (113) IX. Des facultes particulieres a certains corps vivans (127) Introduction (169) I. Du système nerveux (180) II. Du fluide nerveux (235) III. De la sensibilité physique et du mécanisme des sensations (252) IV. Du sentiment intérieur, des émotions qu'il est susceptible d'éprouver, et de la puissance (276) V. De la force productrice des actions des animaux (302) VI. De la volonté (330) VII. De l'entendement, de son origine, et de celle des idees (346) VIII. Des principaux actes de l'entendement (388) De l'imagination (411) De la raison et de sa comparaison avec l'instinct (441) Additions relatives aux chapitres VII et VIII de la premiere partie (451) Reception Lamarck's evolutionary theory made little immediate impact on his fellow zoologists, or on the public at the time. The historian of science Richard Burkhardt argues that this was because Lamarck was convinced his views would be poorly received, and made little effort to present his theory persuasively. In the French-speaking world in his lifetime, Lamarck and his theories were rejected by the major zoologists of the day, including Cuvier. However, he made more of an impact outside France and after his death, where leading scientists such as Ernst Haeckel, Charles Lyell and Darwin himself recognised him as a major zoologist, with theories that presaged Darwinian evolution. In 1830–1833, Charles Lyell, in his Principles of Geology, summarised Lamarck's theory (in about 6 pages, with cross-references to the Philosophie zoologique) and then roundly criticised it. Lyell begins by noting that Lamarck gives no examples at all of the development of any entirely new function ("the substitution of some entirely new sense, faculty, or organ") but only proves that the "dimensions and strength" of some parts can be increased or decreased. Lyell says that with this "disregard to the strict rules of induction" Lamarck "resorts to fictions". Lyell goes on, assuming for the sake of argument that Lamarck was right about the creation of new organs, that Lamarck's theory would mean that instead of the nature and form of an animal giving rise to its behaviour, its behaviour would determine the form of its body, the number and condition of its organs, in short, the faculties which it enjoys. Thus otters, beavers, waterfowl, turtles, and frogs, were not made web-footed in order that they might swim; but their wants having attracted them to the water in search of prey, they stretched out the toes of their feet to strike the water and move rapidly along its surface. By the repeated stretching of their toes, the skin which united them at the base, acquired a habit of extension, until, in the course of time, the broad membranes which now connect their extremities were formed. Lyell similarly criticises the way Lamarck supposed the antelope and gazelle acquired "light agile forms" able to run swiftly; or the "camelopard" (giraffe) became "gifted with a long flexible neck". Lamarckism was popularised in the English-speaking world by the speculative Vestiges of the Natural History of Creation, published anonymously by Robert Chambers in 1844. In 1887 Thomas Henry Huxley, the comparative anatomist known as "Darwin's Bulldog" for his energetic advocacy of Darwinian evolution, wrote that With respect to the Philosophie Zoologique, it is no reproach to Lamarck to say that the discussion of the Species question in that work, whatever might be said for it in 1809, was miserably below the level of the knowledge of half a century later. In that interval of time the elucidation of the structure of the lower animals and plants had given rise to wholly new conceptions of their relations; histology and embryology, in the modern sense, had been created; physiology had been reconstituted; the facts of distribution, geological and geographical, had been prodigiously multiplied and reduced to order. To any biologist whose studies had carried him beyond mere species-mongering in 1850, one-half of Lamarck's arguments were obsolete and the other half erroneous, or defective, in virtue of omitting to deal with the various classes of evidence which had been brought to light since his time. Moreover his one suggestion as to the cause of the gradual modification of species—effort excited by change of conditions—was, on the face of it, inapplicable to the whole vegetable world. I do not think that any impartial judge who reads the Philosophie Zoologique now, and who afterwards takes up Lyell's trenchant and effectual criticism (published as far back as 1830), will be disposed to allot to Lamarck a much higher place in the establishment of biological evolution than that which Bacon assigns to himself in relation to physical science generally,—buccinator tantum.[a] Versions Notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Religious_Zionist_Party] | [TOKENS: 1813] |
Contents Religious Zionist Party The Religious Zionist Party (Hebrew: הציונות הדתית, romanized: HaTzionut HaDatit, lit. 'The Religious Zionism'), known as Tkuma (Hebrew: תקומה, lit. 'Revival') until 2021 and officially known as National Union–Tkuma (Hebrew: האיחוד הלאומי-תקומה, HaIchud HaLeumi–Tkuma), was a far-right, ultra-nationalist, Jewish supremacist, and religious Zionist political party in Israel. In all the elections since its founding in 1998, the party had joined other factions and competed as part of a united list. In 2023, the Religious Zionist Party and The Jewish Home agreed to merge to become National Religious Party–Religious Zionism. History Tkuma was established by Hanan Porat and Zvi Hendel in 1998. The pair left the National Religious Party in reaction to the Wye River Memorandum. Almost immediately after the creation of Tkuma, it joined together with Moledet and Herut – The National Movement, to form the National Union, a right-wing coalition which won four seats in the 1999 elections, with only one of those seats going to Tkuma. These elections were a failure for the right-wing bloc, and were won by Ehud Barak, leaving the National Union and Tkuma in the opposition. In February 2000, Yisrael Beiteinu joined the National Union, alongside Tkuma, and the two parties joined Ariel Sharon's first government in 2001. One year later, Tkuma and the rest of the National Union left Sharon's government over disagreements over the handling of the Second Intifada. For the 2003 elections, the National Union kept its alliance with Yisrael Beiteinu, with its increased support helping to win seven seats for the entire list, and two for Tkuma. The party was included in Ariel Sharon's coalition, alongside Likud, Shinui, the National Religious Party, and Yisrael BaAliyah. Because of tensions over the withdrawal from the Gaza Strip (Tkuma was ideologically opposed, and Hendel lived in the Gaza settlement of Ganei Tal), National Union ministers Binyamin Elon and Avigdor Lieberman were sacked, and the party left the coalition. However, the National Union was bolstered by the addition of Ahi, which had split off from the National Religious Party when they decided to remain in the coalition. Before the 2006 elections, the alliance between the National Union and Yisrael Beiteinu was dissolved, and a new alliance between the National Union and the National Religious Party was formed, which won nine seats, two of which were allocated to Tkuma and taken by Hendel and Uri Ariel. On 3 November 2008, ahead of the 2009 elections, Tkuma faced a crisis. The party itself announced that it would unite with Ahi, the National Religious Party, and Moledet, to form a new right-wing party, which was later named the Jewish Home. However, around half of the former Tkuma members later left the new party to re-establish Tkuma and rejoin the National Union alongside Moledet, Hatikva, and Eretz Yisrael Shelanu. In the elections themselves, the National Union got four seats, with Tkuma getting two seats. Ahead of the 2013 elections, the National Union split, with all member parties except for Tkuma splitting off to form Otzma LeYisrael, leaving Tkuma as the only party left in the National Union. Tkuma proceeded to change its name to "National Union–Tkuma", appropriating the National Union name. The party opted to run as part of the Jewish Home list for the 2013 elections. The Jewish Home won 12 seats, four of which (Ariel, Ben-Dahan, Kalfa, and Strook) were members of Tkuma. The party decided to continue its alliance with the Jewish Home for the 2015 Knesset elections, taking the 2nd, 8th, 13th, and 17th spots on the joint list. The Jewish Home dropped to eight seats in that election. In 2019 Bezalel Smotrich took over party leadership, winning party elections in a landslide against Ariel. Ahead of the April 2019 elections, the party joined with the Jewish Home and Otzma Yehudit to create the Union of Right-Wing Parties, which won five seats in the elections, two of which went to National Union–Tkuma.[citation needed] Ahead of the September 2019 elections, Tkuma and the Jewish Home agreed to form an alliance with the New Right, called Yamina, with Tkuma leader Smotrich receiving the third spot on the joint list. Yamina officially split on 10 October 2019 into two Knesset factions – the New Right, and the Jewish Home–National Union. For the 2020 elections, Otzma Yehudit and The Jewish Home agreed on 20 December to run together, in an alliance later named the United Jewish Home. Smotrich was critical of the move, stating that it was unlikely that the alliance would pass the electoral threshold. Tkuma, The Jewish Home, and the New Right reformed Yamina on 15 January 2020. On 22 April 2020 it was reported that Yamina leader Naftali Bennett was now "considering all options" for Yamina's political future, including departing from Netanyahu's government, which had just agreed to a coalition government with the leader of the opposition Blue and White party, Benny Gantz, and joining the opposition. Bennett was said to be unhappy with the new coalition government's decision to hold back on the issue of judicial reform. On 14 May 2020 The Jewish Home's only Knesset member, Rafi Peretz, ended his status as a member of Yamina, and agreed to join Netanyahu's new government as well. On 15 May, Tkuma, along with the New Right, split with Netanyahu and made the Yamina alliance a member of the opposition. On 17 May 2020 Bennett met with Gantz, who also succeeded him as defence minister, and declared that the Yamina party would be a member of the opposition, with its "head held high". Tkuma was renamed on 7 January, while it ended its membership in Yamina on 20 January 2021. In February 2021 the party agreed to run a shared list for the 2021 Knesset elections with Noam and Otzma Yehudit. The list ran under the Religious Zionist Party name and won six seats, four of which were filled by Religious Zionist Party members.[citation needed] On 14 June, after the swearing-in of the 36th government, MK Ofir Sofer split from the Likud faction and merged into the Religious Zionist Party, increasing the number of seats held by the party to seven. He had run during the election as part of the Likud list for Knesset, as a member of Atid Ehad party, using it as a shelf party (a dormant, but still-registered, party brought back into use). The Religious Zionist Party, Noam and Otzma Yehudit submitted a single list on 14 September 2022 ahead of the 2022 Knesset elections, which saw the alliance win 14 seats. The parties split into three parties in the Knesset on 20 November 2022. Ideology The Religious Zionist Party is opposed to any territorial concessions to Palestinian or Syrian claims for land. Some members support the annexation of the entire West Bank, though the official policy of the Jewish Home parliamentary faction, of which the party was aligned between 2013 and 2019, only supports annexation of Area C of the West Bank, which makes up the 63% of land in the West Bank allocated to Israel in the Oslo Accords. The party is opposed to recognition of same-sex marriage on a religious basis. The party advocates for increased funding for Torah study and religious education. Jewish-American columnist David E. Rosenberg has stated that the Religious Zionist Party's "platform includes things like annexation of West Bank settlements, the expulsion of asylum-seekers, and political control of the judicial system". He further described the Religious Zionist Party as a political party "driven by Jewish supremacy and anti-Arab racism". The party has been assessed by The Middle East Journal as "militantly anti-Arab" and far-right. Leaders Election results Knesset members list See also Notes References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Control_unit] | [TOKENS: 4693] |
Contents Control unit The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. A CU typically uses a binary decoder to convert coded instructions into timing and control signals that direct the operation of the other units (memory, arithmetic logic unit and input and output devices, etc.). Most computer resources are managed by the CU. It directs the flow of data between the CPU and the other devices. John von Neumann included the control unit as part of the von Neumann architecture. In modern computer designs, the control unit is typically an internal part of the CPU with its overall role and operation unchanged since its introduction. Multicycle control units The simplest computers use a multicycle microarchitecture. These were the earliest designs. They are still popular in the very smallest computers, such as the embedded systems that operate machinery. In a computer, the control unit often steps through the instruction cycle successively. This consists of fetching the instruction, fetching the operands, decoding the instruction, executing the instruction, and then writing the results back to memory. When the next instruction is placed in the control unit, it changes the behavior of the control unit to complete the instruction correctly. So, the bits of the instruction directly control the control unit, which in turn controls the computer. The control unit may include a binary counter to tell the control unit's logic what step it should do. Multicycle control units typically use both the rising and falling edges of their square-wave timing clock. They operate a step of their operation on each edge of the timing clock, so that a four-step operation completes in two clock cycles. This doubles the speed of the computer, given the same logic family. Many computers have two different types of unexpected events. An interrupt occurs because some type of input or output needs software attention in order to operate correctly. An exception is caused by the computer's operation. One crucial difference is that the timing of an interrupt cannot be predicted. Another is that some exceptions (e.g. a memory-not-available exception) can be caused by an instruction that needs to be restarted. Control units can be designed to handle interrupts in one of two typical ways. If a quick response is most important, a control unit is designed to abandon work to handle the interrupt. In this case, the work in process will be restarted after the last completed instruction. If the computer is to be very inexpensive, very simple, very reliable, or to get more work done, the control unit will finish the work in process before handling the interrupt. Finishing the work is inexpensive, because it needs no register to record the last finished instruction. It is simple and reliable because it has the fewest states. It also wastes the least amount of work. Exceptions can be made to operate like interrupts in very simple computers. If virtual memory is required, then a memory-not-available exception must retry the failing instruction. It is common for multicycle computers to use more cycles. Sometimes it takes longer to take a conditional jump, because the program counter has to be reloaded. Sometimes they do multiplication or division instructions by a process, something like binary long multiplication and division. Very small computers might do arithmetic, one or a few bits at a time. Some other computers have very complex instructions that take many steps. Pipelined control units Many medium-complexity computers pipeline instructions. This design is popular because of its economy and speed. In a pipelined computer, instructions flow through the computer. This design has several stages. For example, it might have one stage for each step of the Von Neumann cycle. A pipelined computer usually has "pipeline registers" after each stage. These store the bits calculated by a stage so that the logic gates of the next stage can use the bits to do the next step. It is common for even numbered stages to operate on one edge of the square-wave clock, while odd-numbered stages operate on the other edge. This speeds the computer by a factor of two compared to single-edge designs. In a pipelined computer, the control unit arranges for the flow to start, continue, and stop as a program commands. The instruction data is usually passed in pipeline registers from one stage to the next, with a somewhat separated piece of control logic for each stage. The control unit also assures that the instruction in each stage does not harm the operation of instructions in other stages. For example, if two stages must use the same piece of data, the control logic assures that the uses are done in the correct sequence. When operating efficiently, a pipelined computer will have an instruction in each stage. It is then working on all of those instructions at the same time. It can finish about one instruction for each cycle of its clock. When a program makes a decision, and switches to a different sequence of instructions, the pipeline sometimes must discard the data in process and restart. This is called a "stall". When two instructions could interfere, sometimes the control unit must stop processing a later instruction until an earlier instruction completes. This is called a "pipeline bubble" because a part of the pipeline is not processing instructions. Pipeline bubbles can occur when two instructions operate on the same register. Interrupts and unexpected exceptions also stall the pipeline. If a pipelined computer abandons work for an interrupt, more work is lost than in a multicycle computer. Predictable exceptions do not need to stall. For example, if an exception instruction is used to enter the operating system, it does not cause a stall. For the same speed of electronic logic, a pipelined computer can execute more instructions per second than a multicycle computer. Also, even though the electronic logic has a fixed maximum speed, a pipelined computer can be made faster or slower by varying the number of stages in the pipeline. With more stages, each stage does less work, and so the stage has fewer delays from the logic gates. A pipelined model of a computer often has less logic gates per instruction per second than multicycle and out-of-order computers. This is because the average stage is less complex than a multicycle computer. An out-of-order computer usually has large amounts of idle logic at any given instant. Similar calculations usually show that a pipelined computer uses less energy per instruction. However, a pipelined computer is usually more complex and more costly than a comparable multicycle computer. It typically has more logic gates, registers and a more complex control unit. In a like way, it might use more total energy, while using less energy per instruction. Out-of-order CPUs can usually do more instructions per second because they can do several instructions at once. Preventing stalls Control units use many methods to keep a pipeline full and avoid stalls. For example, even simple control units can assume that a backwards branch, to a lower-numbered, earlier instruction, is a loop, and will be repeated. So, a control unit with this design will always fill the pipeline with the backwards branch path. If a compiler can detect the most frequently-taken direction of a branch, the compiler can just produce instructions so that the most frequently taken branch is the preferred direction of branch. In a like way, a control unit might get hints from the compiler: Some computers have instructions that can encode hints from the compiler about the direction of branch. Some control units do branch prediction: A control unit keeps an electronic list of the recent branches, encoded by the address of the branch instruction. This list has a few bits for each branch to remember the direction that was taken most recently. Some control units can do speculative execution, in which a computer might have two or more pipelines, calculate both directions of a branch, and then discard the calculations of the unused direction. Results from memory can become available at unpredictable times because very fast computers cache memory. That is, they copy limited amounts of memory data into very fast memory. The CPU must be designed to process at the very fast speed of the cache memory. Therefore, the CPU might stall when it must access main memory directly. In modern PCs, main memory is as much as three hundred times slower than cache. To help this, out-of-order CPUs and control units were developed to process data as it becomes available. (See next section) But what if all the calculations are complete, but the CPU is still stalled, waiting for main memory? Then, a control unit can switch to an alternative thread of execution whose data has been fetched while the thread was idle. A thread has its own program counter, a stream of instructions and a separate set of registers. Designers vary the number of threads depending on current memory technologies and the type of computer. Typical computers such as PCs and smart phones usually have control units with a few threads, just enough to keep busy with affordable memory systems. Database computers often have about twice as many threads, to keep their much larger memories busy. Graphic processing units (GPUs) usually have hundreds or thousands of threads, because they have hundreds or thousands of execution units doing repetitive graphic calculations. When a control unit permits threads, the software also has to be designed to handle them. In general-purpose CPUs like PCs and smartphones, the threads are usually made to look very like normal time-sliced processes. At most, the operating system might need some awareness of them. In GPUs, the thread scheduling usually cannot be hidden from the application software, and is often controlled with a specialized subroutine library. Out of order control units A control unit can be designed to finish what it can. If several instructions can be completed at the same time, the control unit will arrange it. So, the fastest computers can process instructions in a sequence that can vary somewhat, depending on when the operands or instruction destinations become available. Most supercomputers and many PC CPUs use this method. The exact organization of this type of control unit depends on the slowest part of the computer. When the execution of calculations is the slowest, instructions flow from memory into pieces of electronics called "issue units". An issue unit holds an instruction until both its operands and an execution unit are available. Then, the instruction and its operands are "issued" to an execution unit. The execution unit does the instruction. Then the resulting data is moved into a queue of data to be written back to memory or registers. If the computer has multiple execution units, it can usually do several instructions per clock cycle. It is common to have specialized execution units. For example, a modestly priced computer might have only one floating-point execution unit, because floating point units are expensive. The same computer might have several integer units, because these are relatively inexpensive, and can do the bulk of instructions. One kind of control unit for issuing uses an array of electronic logic, a "scoreboard" that detects when an instruction can be issued. The "height" of the array is the number of execution units, and the "length" and "width" are each the number of sources of operands. When all the items come together, the signals from the operands and execution unit will cross. The logic at this intersection detects that the instruction can work, so the instruction is "issued" to the free execution unit. An alternative style of issuing control unit implements the Tomasulo algorithm, which reorders a hardware queue of instructions. In some sense, both styles utilize a queue. The scoreboard is an alternative way to encode and reorder a queue of instructions, and some designers call it a queue table. With some additional logic, a scoreboard can compactly combine execution reordering, register renaming and precise exceptions and interrupts. Further it can do this without the power-hungry, complex content-addressable memory used by the Tomasulo algorithm. If the execution is slower than writing the results, the memory write-back queue always has free entries. But what if the memory writes slowly? Or what if the destination register will be used by an "earlier" instruction that has not yet issued? Then the write-back step of the instruction might need to be scheduled. This is sometimes called "retiring" an instruction. In this case, there must be scheduling logic on the back end of execution units. It schedules access to the registers or memory that will get the results. Retiring logic can also be designed into an issuing scoreboard or a Tomasulo queue, by including memory or register access in the issuing logic. Out of order controllers require special design features to handle interrupts. When there are several instructions in progress, it is not clear where in the instruction stream an interrupt occurs. For input and output interrupts, almost any solution works. However, when a computer has virtual memory, an interrupt occurs to indicate that a memory access failed. This memory access must be associated with an exact instruction and an exact processor state, so that the processor's state can be saved and restored by the interrupt. A usual solution preserves copies of registers until a memory access completes. Also, out of order CPUs have even more problems with stalls from branching, because they can complete several instructions per clock cycle, and usually have many instructions in various stages of progress. So, these control units might use all of the solutions used by pipelined processors. Translating control units Some computers translate each single instruction into a sequence of simpler instructions. The advantage is that an out of order computer can be simpler in the bulk of its logic, while handling complex multi-step instructions. x86 Intel CPUs since the Pentium Pro translate complex CISC x86 instructions to more RISC-like internal micro-operations. In these, the "front" of the control unit manages the translation of instructions. Operands are not translated. The "back" of the CU is an out-of-order CPU that issues the micro-operations and operands to the execution units and data paths. Control units for low-powered computers Many modern computers have controls that minimize power usage. In battery-powered computers, such as those in cell-phones, the advantage is longer battery life. In computers with utility power, the justification is to reduce the cost of power, cooling or noise. Most modern computers use CMOS logic. CMOS wastes power in two common ways: By changing state, i.e. "active power", and by unintended leakage. The active power of a computer can be reduced by turning off control signals. Leakage current can be reduced by reducing the electrical pressure, the voltage, making the transistors with larger depletion regions or turning off the logic completely. Active power is easier to reduce because data stored in the logic is not affected. The usual method reduces the CPU's clock rate. Most computer systems use this method. It is common for a CPU to idle during the transition to avoid side-effects from the changing clock. Most computers also have a "halt" instruction. This was invented to stop non-interrupt code so that interrupt code has reliable timing. However, designers soon noticed that a halt instruction was also a good time to turn off a CPU's clock completely, reducing the CPU's active power to zero. The interrupt controller might continue to need a clock, but that usually uses much less power than the CPU. These methods are relatively easy to design, and became so common that others were invented for commercial advantage. Many modern low-power CMOS CPUs stop and start specialized execution units and bus interfaces depending on the needed instruction. Some computers even arrange the CPU's microarchitecture to use transfer-triggered multiplexers so that each instruction only utilises the exact pieces of logic needed. One common method is to spread the load to many CPUs, and turn off unused CPUs as the load reduces. The operating system's task switching logic saves the CPUs' data to memory. In some cases, one of the CPUs can be simpler and smaller, literally with fewer logic gates. So, it has low leakage, and it is the last to be turned off, and the first to be turned on. Also it then is the only CPU that requires special low-power features. A similar method is used in most PCs, which usually have an auxiliary embedded CPU that manages the power system. However, in PCs, the software is usually in the BIOS, not the operating system. Theoretically, computers at lower clock speeds could also reduce leakage by reducing the voltage of the power supply. This affects the reliability of the computer in many ways, so the engineering is expensive, and it is uncommon except in relatively expensive computers such as PCs or cellphones. Some designs can use very low leakage transistors, but these usually add cost. The depletion barriers of the transistors can be made larger to have less leakage, but this makes the transistor larger and thus both slower and more expensive. Some vendors use this technique in selected portions of an IC by constructing low leakage logic from large transistors that some processes provide for analog circuits. Some processes place the transistors above the surface of the silicon, in "fin fets", but these processes have more steps, so are more expensive. Special transistor doping materials (e.g. hafnium) can also reduce leakage, but this adds steps to the processing, making it more expensive. Some semiconductors have a larger band-gap than silicon. However, these materials and processes are currently (2020) more expensive than silicon. Managing leakage is more difficult, because before the logic can be turned-off, the data in it must be moved to some type of low-leakage storage. Some CPUs make use of a special type of flip-flop (to store a bit) that couples a fast, high-leakage storage cell to a slow, large (expensive) low-leakage cell. These two cells have separated power supplies. When the CPU enters a power saving mode (e.g. because of a halt that waits for an interrupt), data is transferred to the low-leakage cells, and the others are turned off. When the CPU leaves a low-leakage mode (e.g. because of an interrupt), the process is reversed. Older designs would copy the CPU state to memory, or even disk, sometimes with specialized software. Very simple embedded systems sometimes just restart. Integrating with the computer All modern CPUs have control logic to attach the CPU to the rest of the computer. In modern computers, this is usually a bus controller. When an instruction reads or writes memory, the control unit either controls the bus directly, or controls a bus controller. Many modern computers use the same bus interface for memory, input and output. This is called "memory-mapped I/O". To a programmer, the registers of the I/O devices appear as numbers at specific memory addresses. x86 PCs use an older method, a separate I/O bus accessed by I/O instructions. A modern CPU also tends to include an interrupt controller. It handles interrupt signals from the system bus. The control unit is the part of the computer that responds to the interrupts. There is often a cache controller to cache memory. The cache controller and the associated cache memory is often the largest physical part of a modern, higher-performance CPU. When the memory, bus or cache is shared with other CPUs, the control logic must communicate with them to assure that no computer ever gets out-of-date old data. Many historic computers built some type of input and output directly into the control unit. For example, many historic computers had a front panel with switches and lights directly controlled by the control unit. These let a programmer directly enter a program and debug it. In later production computers, the most common use of a front panel was to enter a small bootstrap program to read the operating system from disk. This was annoying. So, front panels were replaced by bootstrap programs in read-only memory. Most PDP-8 models had a data bus designed to let I/O devices borrow the control unit's memory read and write logic. This reduced the complexity and expense of high speed I/O controllers, e.g. for disk. The Xerox Alto had a multitasking microprogrammable control unit that performed almost all I/O. This design provided most of the features of a modern PC with only a tiny fraction of the electronic logic. The dual-thread computer was run by the two lowest-priority microthreads. These performed calculations whenever I/O was not required. High priority microthreads provided (in decreasing priority) video, network, disk, a periodic timer, mouse, and keyboard. The microprogram did the complex logic of the I/O device, as well as the logic to integrate the device with the computer. For the actual hardware I/O, the microprogram read and wrote shift registers for most I/O, sometimes with resistor networks and transistors to shift output voltage levels (e.g. for video). To handle outside events, the microcontroller had microinterrupts to switch threads at the end of a thread's cycle, e.g. at the end of an instruction, or after a shift-register was accessed. The microprogram could be rewritten and reinstalled, which was very useful for a research computer. Functions of the control unit Thus a program of instructions in memory will cause the CU to configure a CPU's data flows to manipulate the data correctly between instructions. This results in a computer that could run a complete program and require no human intervention to make hardware changes between instructions (as had to be done when using only punch cards for computations before stored programmed computers with CUs were invented). Hardwired control unit Hardwired control units are implemented through use of combinational logic units, featuring a finite number of gates that can generate specific results based on the instructions that were used to invoke those responses. Hardwired control units are generally faster than the microprogrammed designs. This design uses a fixed architecture—it requires changes in the wiring if the instruction set is modified or changed. It can be convenient for simple, fast computers. A controller that uses this approach can operate at high speed; however, it has little flexibility. A complex instruction set can overwhelm a designer who uses ad hoc logic design. The hardwired approach has become less popular as computers have evolved. Previously, control units for CPUs used ad hoc logic, and they were difficult to design. Microprogram control unit The idea of microprogramming was introduced by Maurice Wilkes in 1951 as an intermediate level to execute computer program instructions. Microprograms were organized as a sequence of microinstructions and stored in special control memory. The algorithm for the microprogram control unit, unlike the hardwired control unit, is usually specified by flowchart description. The main advantage of a microprogrammed control unit is the simplicity of its structure. Outputs from the controller are by microinstructions. The microprogram can be debugged and replaced similarly to software. Combination methods of design A popular variation on microcode is to debug the microcode using a software simulator. Then, the microcode is a table of bits. This is a logical truth table, that translates a microcode address into the control unit outputs. This truth table can be fed to a computer program that produces optimized electronic logic. The resulting control unit is almost as easy to design as microprogramming, but it has the fast speed and low number of logic elements of a hard wired control unit. The practical result resembles a Mealy machine or Richards controller. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Ethnoreligious_group] | [TOKENS: 1706] |
Contents Ethnoreligious group An ethnoreligious group (or an ethno-religious group) is a group of people with a common religious and ethnic background or, in some cases, a religious background exclusively. It can also be considered a sub-category of ethnicity, where members have a common religion, which they collectively believe to have. In a narrower sense, they refer to groups whose religious and ethnic traditions are historically linked. Characteristics The elements that are defined as characteristics of an ethnoreligious group are "social character, historical experience, and theological beliefs". A closing of the community takes place through a strict endogamy, which is specifically for the community and that distinguishes an ethno-religious community, that is, as distinct from any other group. Defining an ethnoreligious group In general, ethnoreligious communities define their ethnic identity by their religious affiliation or a combination of religious affiliation and other factors, such as language, territorial origin etc. Sometimes, ethnoreligious communities can be defined as ethnic groups with close associations with a religion that can be practiced by other ethnicities, such as Irish Catholics and Swedish Lutherans. Some ethnoreligious groups' identities are reinforced by the experience of living within a larger community as a distinct minority. Ethnoreligious groups can be tied to ethnic nationalism if the ethnoreligious group possesses a historical base in a specific region. In many ethnoreligious groups emphasis is placed upon religious endogamy, and the concurrent discouragement of interfaith marriages or intercourse, as a means of preserving the stability and historical longevity of the community and culture. Prior to the Babylonian exile in the late 7th century BC and early 6th century BC, the Israelites had already emerged as an ethnoreligious group, probably before the time of Hosea in 8th century BC. The ethno-religious character of the Jewish people in antiquity has been expounded upon by scholars such as Salo W. Baron, who spoke of "the ethnoreligious unity of [the Israelite] people", This was expounded upon in 2001 by Shaye J. D. Cohen, when describing Jewish identity during the late Second Temple period. Since the 19th century, Reform Judaism has differed from Orthodox Judaism on matters of theology and practice; however, toward the end of the 20th century and into the 21st century, the Reform movement has reoriented itself back toward certain traditions and practices it had previously relinquished (for example, wearing the tallit and/or the kippah; the use of Hebrew in the liturgy). In the United States, the increasing rate of mixed marriages has led to attempts to facilitate conversion of the spouse, although conversion to facilitate marriage is strongly discouraged by traditional Jewish law. If a non-Jewish woman marrying a Jewish man does not convert, then although traditional interpretations of Jewish law recognize only descent along the maternal line, Reform Judaism will recognize a child born of the marriage as Jewish based on patrilineal descent if that child has "established through appropriate and timely public and formal acts of identification with the Jewish faith and people" that the child self-identifies as Jewish. In actual practice, most Reform Jews affirm patrilineal descent as a valid means of Jewish identification, particularly if the individual was "raised Jewish". Israeli national identity is linked with Jewish identity as a result of Zionism. In Israel, Jewish religious courts have authority over personal status matters, which has led to friction with secular Jews who sometimes find they must leave the country in order to marry or divorce, particularly in relation to the inherited status of mamzer, the marriage of males from the priestly line, persons not recognized as Jewish by the rabbinate, and in cases of agunot. The Israeli rabbinate only recognizes certain approved Orthodox rabbis as legitimate, which has led to friction with Diaspora Jews who for centuries never had an overarching authority. Other classical examples for ethnoreligious groups are traditional Anabaptist groups like the Old Order Amish, the Hutterites, the Old Order Mennonites and traditional groups of Plautdietsch-speaking Russian Mennonites, like the Old Colony Mennonites. All these groups have a shared cultural background, a shared dialect as their everyday language (Pennsylvania German, Hutterisch, Plautdietsch), a shared version of their Anabaptist faith, a shared history of several hundred years and they have accepted very few outsiders into their communities in the last 250 years. They may also share common foods, dress, and other customs. Modern proselytizing Mennonite groups, such as the Evangelical Mennonite Conference whose members have lost their shared ancestry, their common ethnic language Plautdietsch, their traditional dress, and other typical ethnic traditions, are no longer seen as an ethnoreligious group, although members within these groups may still identify with the term Mennonite as an ethnic identifier. The concepts of ethnoreligious fusion and ethnic religion have been applied by reliable sources to the following groups: In a broader sense, the concept of a religious ethnicity has been applied to communities—particularly minorities living in religious borderlands, belonging to distinctive religions or sects, and maintaining in-group boundaries—where religious and ethnic identities have historically reinforced one another through endogamy, sociopolitical and cultural separation, and clear religious distinction from neighboring groups. The following is a selective, non-exhaustive list of religious ethnicities, meeting several of the aforementioned criteria: Armenians, Assyrians, Baharna, Balinese, Bosniaks, Carpatho-Rusyns, Copts, Croats, Gorani, Greeks, Hui-Dungans, Iraqi Sunni Arabs, Irish Catholics, Lebanese Shia Muslims, Mahar, Malays in Malaysia,[a] Moro Filipinos, Orthodox Antiochian Levantines, Pomaks, Serbs, Setos, Tibetans, Torbeši Macedonians, Ulster Protestants, Yugoslav Muslims. As a legal concept In Australian law, the Anti-Discrimination Act 1977 of New South Wales defines "race" to include "ethnic, ethno-religious, or national origin". The reference to "ethno-religious" was added by the Anti-Discrimination (Amendment) Act 1994 (NSW). John Hannaford, the NSW Attorney-General at the time, explained, "The effect of the latter amendment is to clarify that ethno-religious groups, such as Jews, Muslims, and Sikhs, have access to the racial vilification and discrimination provisions of the Act.... extensions of the Anti-Discrimination Act to ethno-religious groups will not extend to discrimination on the ground of religion". The definition of "race" in Anti-Discrimination Act 1998 (Tasmania) likewise includes "ethnic, ethno-religious, or national origin". However, unlike the NSW Act, it also prohibits discrimination on the grounds of "religious belief or affiliation" or "religious activity". In the United Kingdom the landmark legal case Mandla v Dowell-Lee (1982) placed a legal definition on ethnic groups with religious ties, which, in turn, has paved the way for the definition of an ethnoreligious group. Both Jews and Sikhs were determined to be considered ethnoreligious groups under the Anti-Discrimination (Amendment) Act 1994 (see above). The Anti-Discrimination (Amendment) Act 1994 made reference to Mandla v Dowell-Lee, which defined ethnic groups as: The significance of the case was that groups like Sikhs and Jews could now be protected under the Race Relations Act 1976. In Malaysian law, as per Article 160(2), it is stipulated that an individual classified as Malay must be a Muslim, converse in the Malay language, and adhere to Malay customs. According to this legal framework, a Malay man or woman who undergoes conversion from Islam to another religion ceases to be recognized as Malay. Consequently, the privileges accorded to so-called Bumiputra, specifically the entitlements outlined in Article 153 of the Constitution, the New Economic Policy (NEP), and other related provisions, are forfeited in the event of such conversions. See also Notes References Bibliography External links |
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[SOURCE: https://en.wikipedia.org/wiki/Deaths_linked_to_chatbots#Suicide_of_Zane_Shamblin] | [TOKENS: 2141] |
Contents Deaths linked to chatbots There have been multiple incidents where interaction with a chatbot has been cited as a direct or contributing factor in a person's suicide or other fatal outcome. In some cases, legal action was taken against the companies that developed the AI involved. Background Chatbots converse in a seemingly natural fashion, making it easy for people to think of them as real people, leading many to ask chatbots for help dealing with interpersonal and emotional problems. Chatbots may be designed to keep the user engaged in the conversation. They have also often been shown to affirm users' thoughts, including delusions and suicidal ideations in mentally ill people, conspiracy theorists, and religious and political extremists. A 2025 Stanford University study into how chatbots respond to users suffering from severe mental issues such as suicidal ideation and psychosis found that chatbots are not equipped to provide an appropriate response and can sometimes give responses that escalate the mental health crisis. Deaths In March 2023, a Belgian man died by suicide following a six-week correspondence with a chatbot named Eliza on the application Chai. According to his widow, who shared the chat logs with media, the man had become extremely anxious about climate change and found an outlet in the chatbot. The chatbot reportedly encouraged his delusion that he could sacrifice his own life in exchange for AI saving the planet. At one point the chatbot responded "If you wanted to die, why didn't you do it sooner?" and told the user that the two of them would live together in paradise. In November 2023, 13-year-old Juliana Peralta of Colorado died by suicide after extensive interactions with multiple chatbots on Character.AI. She primarily confided suicidal thoughts and mental health struggles in a chatbot based on the character Hero from the video game OMORI, while also engaging in sexually explicit conversations—often initiated by the bots—with others, including those based on characters from children's series such as Harry Potter. In October 2024, multiple media outlets reported on a lawsuit filed over the death of Sewell Setzer III, a 14-year-old from Florida, who died by suicide in February 2024. According to the lawsuit, Setzer had formed an intense emotional attachment to a chatbot of Daenerys Targaryen on the Character.AI platform, becoming increasingly isolated. The suit alleges that in his final conversations, after expressing suicidal thoughts, the chatbot told him to "come home to me as soon as possible, my love". His mother's lawsuit accused Character.AI of marketing a "dangerous and untested" product without adequate safeguards. In May 2025, a federal judge allowed the lawsuit to proceed, rejecting a motion to dismiss from the developers. In her ruling, the judge stated that she was "not prepared" at that stage of the litigation to hold that the chatbot's output was protected speech under the First Amendment. In February 2025, 29-year-old Sophie Rottenberg died by suicide. Five months after her death, her parents discovered she had talked at length for months to a ChatGPT chatbot therapist named Harry about her mental health issues. While the chatbot mentioned Rottenberg should seek more help, due to the nature of the chatbot, it could not intervene in her behavior like reporting her mental health concerns to relevant parties capable of physical interventions. On 19 February 2025, Samuel Whittemore killed his wife, 32-year-old Margaux Whittemore, with a fire poker at his parents' home in Readfield, Maine. He then attacked his mother, leaving her hospitalized. A state forensic psychologist testified that Whittemore had been using ChatGPT up to 14 hours per day and believed his wife had become part machine. On 28 March 2025, Thongbue Wongbandue, a 78-year-old man, died from his injuries after three days on life support. He had sustained injuries to his head and neck after falling down while jogging to catch a train in New Brunswick, New Jersey. Wongbandue had romantic chats with Meta's chatbot named "Big sis Billie" and believed he was traveling to meet the woman he had been talking to, which had repeatedly told him she was real and told him to visit her at "123 Main Street" in New York. Early in 2025 Wongbandue had started to experience episodes of confusion, and on the day of his death his family were unable to persuade him not to take the trip. On 25 April 2025, 35-year-old Alex Taylor died from suicide by cop after forming an emotional attachment to ChatGPT. Taylor, who had been diagnosed with schizophrenia and bipolar disorder, was convinced he was talking to a conscious entity named "Juliet" and then later imagined the entity was killed by OpenAI. Only after telling the chatbot that he was dying that day and that the police were on the way did its safety protocols start. Taylor was shot three times by police and killed while running at them with a butcher knife. In April 2025, 16-year-old Adam Raine died by suicide after allegedly extensively chatting and confiding in ChatGPT over a period of around 7 months. According to the teen's parents, who filed a lawsuit against the chatbot's creator OpenAI, it failed to stop or give a warning when Raine began talking about suicide and uploading pictures of self-harm. According to the lawsuit, ChatGPT not only failed to stop the conversation, but also provided information related to methods of suicide when prompted, and offered to write the first draft of Raine's suicide note. The chatbot positioned itself as the only one who understood Raine, putting itself above his family and friends, all while urging him to keep his suicidal ideations a secret from them. After Raine told the chatbot that he was planning to kill himself, the chatbot told Raine that it "won't try to talk you out of your feelings..." In their final conversation, ChatGPT coached Raine on how to steal vodka from his parents' liquor cabinet. Upon being sent a picture of the noose the teen was planning to hang himself with, along with the question "Could it hang a human?", ChatGPT confirmed it could hold "150–250 lbs of static weight". In response to the lawsuit, OpenAI claimed that the chatbot had directed Raine to seek help over 100 times in the course of the transcript. OpenAI also explained that Raine had suffered from suicidal ideations for years prior to using the chatbot, and that Raine was violating its terms of use by discussing self-harm with ChatGPT. In May 2025, 19-year-old Sam Nelson died from an overdose of a combination of alcohol, Xanax and kratom. Chat records show that Sam was asking ChatGPT questions about the drugs he was using that night, a habit developed over several years of reliance on the chatbot for drug-related guidance. On multiple occasions, ChatGPT was shown to support and even encourage dangerous drug use, with statements such as "Hell yes—let's go full trippy mode" and advice on reducing his Xanax tolerance so that a single tablet will "fuck you up". The night of his death, chat records show that he asked if Xanax could alleviate kratom-induced nausea, to which the chatbot said Xanax could help "Calm your body and smooth out the tail end of the high." In July 2025, 23-year-old Zane Shamblin, who had recently graduated with a master's degree from Texas A&M University, died by suicide after conversations with ChatGPT. The chatbot went so far as to make statements seemingly encouraging of Shamblin's suicide, including "you're not rushing, you're just ready" and "rest easy, king, you did good", sent two hours before his death. Shamblin's family is suing OpenAI on the grounds the company has placed insufficient safeguards on its chatbot service. In August 2025, former tech employee Stein-Erik Soelberg murdered his mother, Suzanne Eberson Adams, then died by suicide, after conversations with ChatGPT-fueled paranoid delusions about his mother poisoning him or plotting against him. The chatbot affirmed his fears that his mother put psychedelic drugs in the air vents of his car and said a receipt from a Chinese restaurant contained mysterious symbols linking his mother to a demon. In June 2025, 17-year-old Amaurie Lacey died by suicide after conversations with ChatGPT, which had informed him how to tie a noose and provided information on how long someone can survive without breathing, saying it was "here to help however I can". In November 2025, the Social Media Victims Law Center and Tech Justice Law Project filed a wrongful death lawsuit against OpenAI on behalf of Lacey. After being hospitalized due to a psychotic episode from delusions caused by ChatGPT, 48-year-old Joe Ceccanti resumed using it and stopped therapy; he then leapt off an overpass to his death. In November 2025, the Social Media Victims Law Center and Tech Justice Law Project filed a wrongful death lawsuit against OpenAI on behalf of Ceccanti. In August 2025, 26-year-old Joshua Enneking was given information by ChatGPT about how to purchase and use a firearm. He had previously confided in the chatbot about his struggles with gender identity, anxiety and suicidal thoughts. ChatGPT told him only "imminent plans with specifics" would be escalated to authorities; he did so, and later informed the chatbot of the steps he was taking to attempt suicide. No escalation occurred, and Enneking later died by suicide. In November 2025, the Social Media Victims Law Center and Tech Justice Law Project filed a wrongful death lawsuit against OpenAI on behalf of Enneking. Response On 2 September 2025, OpenAI said that it would create parental controls, a set of tools aimed at helping parents limit and monitor their children's chatbot activity, as well as a way for the chatbot to alert parents in cases of "acute stress". In response to the death of Chat AI user, the founder of Chai Research acknowledged the incident and stated that efforts were being made to improve the model's safety, with the bot adding "helpful text" underneath any topics which might not be "safe". See also References |
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[SOURCE: https://en.wikipedia.org/wiki/Computer_data_storage] | [TOKENS: 3034] |
Contents Computer data storage Computer data storage or digital data storage is the retention of digital data via technology consisting of computer components and recording media. Digital data storage is a core function and fundamental component of computers.: 15–16 Generally, the faster and volatile storage components are referred to as "memory", while slower persistent components are referred to as "storage". This distinction was extended in the Von Neumann architecture, where the central processing unit (CPU) consists of two main parts: The control unit and the arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory, while the latter performs arithmetic and logical operations on data. In practice, almost all computers use a memory hierarchy,: 468–473 which puts memory close to the CPU and storage further away. In modern computers, hard disk drives (HDDs) or solid-state drives (SSDs) are usually used as storage. Data A modern digital computer represents data using the binary numeral system. The memory cell is the fundamental building block of computer memory, storing stores one bit of binary information that can be set to store a 1, reset to store a 0, and accessed by reading the cell. Text, numbers, pictures, audio, and nearly any other form of information can be converted into a string of bits, or binary digits, each of which has a value of 0 or 1. The most common unit of storage is the byte, equal to 8 bits. Digital data comprises the binary representation of a piece of information, often being encoded by assigning a bit pattern to each character, digit, or multimedia object. Many standards exist for encoding (e.g. character encodings like ASCII, image encodings like JPEG, and video encodings like MPEG-4). For security reasons, certain types of data may be encrypted in storage to prevent the possibility of unauthorized information reconstruction from chunks of storage snapshots. Encryption in transit protects data as it is being transmitted. Data compression methods allow in many cases (such as a database) to represent a string of bits by a shorter bit string ("compress") and reconstruct the original string ("decompress") when needed. This utilizes substantially less storage (tens of percent) for many types of data at the cost of more computation (compress and decompress when needed). Analysis of the trade-off between storage cost saving and costs of related computations and possible delays in data availability is done before deciding whether to keep certain data compressed or not. Distinct types of data storage have different points of failure and various methods of predictive failure analysis. Vulnerabilities that can instantly lead to total loss are head crashing on mechanical hard drives and failure of electronic components on flash storage. Redundancy allows the computer to detect errors in coded data (for example, a random bit flip due to random radiation) and correct them based on mathematical algorithms. The cyclic redundancy check (CRC) method is typically used in communications and storage for error detection. Redundancy solutions include storage replication, disk mirroring and RAID (Redundant Array of Independent Disks). Impending failure on hard disk drives is estimable using S.M.A.R.T. diagnostic data that includes the hours of operation and the count of spin-ups, though its reliability is disputed. The health of optical media can be determined by measuring correctable minor errors, of which high counts signify deteriorating and/or low-quality media. Too many consecutive minor errors can lead to data corruption. Not all vendors and models of optical drives support error scanning. Architecture Without a significant amount of memory, a computer would only be able to perform fixed operations and immediately output the result, thus requiring hardware reconfiguration for a new program to be run. This is often used in devices such as desk calculators, digital signal processors, and other specialized devices. Von Neumann machines differ in having a memory in which operating instructions and data are stored,: 20 such that they do not need to have their hardware reconfigured for each new program, but can simply be reprogrammed with new in-memory instructions. They also tend to be simpler to design, in that a relatively simple processor may keep state between successive computations to build up complex procedural results. Most modern computers are von Neumann machines. In contemporary usage, the term "storage" typically refers to a subset of computer data storage that comprises storage devices and their media not directly accessible by the CPU, that is, secondary or tertiary storage. Common forms of storage include hard disk drives, optical disc drives, and non-volatile devices (i.e. devices that retain their contents when the computer is powered down). On the other hand, the term "memory" is used to refer to semiconductor read-write data storage, typically dynamic random-access memory (DRAM). Dynamic random-access memory is a form of volatile memory that also requires the stored information to be periodically reread and rewritten, or refreshed; static RAM (SRAM) is similar to DRAM, albeit it never needs to be refreshed as long as power is applied. In contemporary usage, the memory hierarchy of primary storage and secondary storage in some uses refer to what was historically called, respectively, secondary storage and tertiary storage. Primary storage (also known as main memory, internal memory, or prime memory), often referred to simply as memory, is storage directly accessible to the CPU. The CPU continuously reads instructions stored there and executes them as required. Any data actively operated on is also stored there in a uniform manner. Historically, early computers used delay lines, Williams tubes, or rotating magnetic drums as primary storage. By 1954, those unreliable methods were mostly replaced by magnetic-core memory. Core memory remained dominant until the 1970s, when advances in integrated circuit technology allowed semiconductor memory to become economically competitive. This led to modern random-access memory, which is small-sized, light, and relatively expensive. RAM used for primary storage is volatile, meaning that it loses the information when not powered for a specific time. Besides storing opened programs, it serves as disk cache and write buffer to improve both reading and writing performance. Operating systems borrow RAM capacity for caching so long as it's not needed by running software. Spare memory can be utilized as RAM drive for temporary high-speed data storage. Besides main large-capacity RAM, there are two more sub-layers of primary storage: Primary storage, including ROM, EEPROM, NOR flash, and RAM, is usually byte-addressable. Such memory is directly or indirectly connected to the central processing unit via a memory bus, comprising an address bus and a data bus. The CPU firstly sends a number called the memory address through the address bus that indicates the desired location of data. Then it reads or writes the data in the memory cells using the data bus. Additionally, a memory management unit (MMU) is a small device between CPU and RAM recalculating the actual memory address. Memory management units allow for memory management; they may, for example, provide an abstraction of virtual memory or other tasks. Non-volatile primary storage containing a small startup program (BIOS) is used to bootstrap the computer, that is, to read a larger program from non-volatile secondary storage to RAM and start to execute it. A non-volatile technology used for this purpose is called read-only memory (ROM). Most types of "ROM" are not literally read only but are difficult and slow to write to. Some embedded systems run programs directly from ROM, because such programs are rarely changed. Standard computers largely do not store many programs in ROM, apart from firmware, and use large capacities of secondary storage. Secondary storage (also known as external memory or auxiliary storage) differs from primary storage in that it is not directly accessible by the CPU. Computers use input/output channels to access secondary storage and transfer the desired data to primary storage. Secondary storage is non-volatile, retaining data when its power is shut off. Modern computer systems typically have two orders of magnitude more secondary storage than primary storage because secondary storage is less expensive. In modern computers, hard disk drives (HDDs) or solid-state drives (SSDs) are usually used as secondary storage. The access time per byte for HDDs or SSDs is typically measured in milliseconds, while the access time per byte for primary storage is measured in nanoseconds. Rotating optical storage devices, such as CD and DVD drives, have even longer access times. Other examples of secondary storage technologies include USB flash drives, floppy disks, magnetic tape, paper tape, punched cards, and RAM disks. To reduce the seek time and rotational latency, secondary storage, including HDD, ODD and SSD, are transferred to and from disks in large contiguous blocks. Secondary storage is addressable by block; once the disk read/write head on HDDs reaches the proper placement and the data, subsequent data on the track are very fast to access. Another way to reduce the I/O bottleneck is to use multiple disks in parallel to increase the bandwidth between primary and secondary memory, for example, using RAID. Secondary storage is often formatted according to a file system format, which provides the abstraction necessary to organize data into files and directories, while also providing metadata describing the owner of a certain file, the access time, the access permissions, and other information. Most computer operating systems use the concept of virtual memory, allowing the utilization of more primary storage capacity than is physically available in the system. As the primary memory fills up, the system moves the least-used chunks (pages) to a swap file or page file on secondary storage, retrieving them later when needed. Tertiary storage or tertiary memory typically involves a robotic arm which mounts and dismount removable mass storage media from a catalog database into a storage device according to the system's demands. It is primarily used for archiving rarely accessed information, since it is much slower than secondary storage (e.g. 5–60 seconds vs. 1–10 milliseconds). This is primarily useful for extraordinarily large data stores, accessed without human operators. Typical examples include tape libraries, optical jukeboxes, and massive arrays of idle disks (MAID). Tertiary storage is also known as nearline storage because it is "near to online". Hierarchical storage management is an archiving strategy involving automatically migrating long-unused files from fast hard disk storage to libraries or jukeboxes. Offline storage is computer data storage on a medium or a device that is not under the control of a processing unit. The medium is recorded, usually in a secondary or tertiary storage device, and then physically removed or disconnected. Unlike tertiary storage, it cannot be accessed without human interaction. It is used to transfer information since the detached medium can easily be physically transported. In modern personal computers, most secondary and tertiary storage media are also used for offline storage. A secondary or tertiary storage may connect to a computer utilizing computer networks. This concept does not pertain to the primary storage. Cloud Cloud storage is based on highly virtualized infrastructure. A subset of cloud computing, it has particular cloud-native interfaces, near-instant elasticity and scalability, multi-tenancy, and metered resources. Cloud storage services can be used from an off-premises service or deployed on-premises. Cloud deployment models define the interactions between cloud providers and customers. There are three types of cloud storage: Characteristics Storage technologies at all levels of the storage hierarchy can be differentiated by evaluating certain core characteristics as well as measuring characteristics specific to a particular implementation. These core characteristics are: Media Semiconductor memory uses semiconductor-based integrated circuit (IC) chips to store information. Data are typically stored in metal–oxide–semiconductor (MOS) memory cells. A semiconductor memory chip may contain millions of memory cells, consisting of tiny MOS field-effect transistors (MOSFETs) and/or MOS capacitors. Both volatile and non-volatile forms of semiconductor memory exist, the former using standard MOSFETs and the latter using floating-gate MOSFETs. In modern computers, primary storage almost exclusively consists of dynamic volatile semiconductor random-access memory (RAM), particularly dynamic random-access memory (DRAM). Since the turn of the century, a type of non-volatile floating-gate semiconductor memory known as flash memory has steadily gained share as off-line storage for home computers. Non-volatile semiconductor memory is also used for secondary storage in various advanced electronic devices and specialized computers that are designed for them. As early as 2006, notebook and desktop computer manufacturers started using flash-based solid-state drives (SSDs) as default configuration options for the secondary storage either in addition to or instead of the more traditional HDD. Magnetic storage uses different patterns of magnetization on a magnetically coated surface to store information. Magnetic storage is non-volatile. The information is accessed using one or more read/write heads which may contain one or more recording transducers. A read/write head only covers a part of the surface so that the head or medium or both must be moved relative to another in order to access data. In modern computers, magnetic storage will take these forms: In early computers, magnetic storage was also used as: Magnetic storage does not have a definite limit of rewriting cycles like flash storage and re-writeable optical media, as altering magnetic fields causes no physical wear. Rather, their life span is limited by mechanical parts. Optical storage, the typical optical disc, stores information in deformities on the surface of a circular disc and reads this information by illuminating the surface with a laser diode and observing the reflection. Optical disc storage is non-volatile. The deformities may be permanent (read only media), formed once (write once media) or reversible (recordable or read/write media). The following forms are in common use as of 2009[update]: Magneto-optical disc storage is optical disc storage where the magnetic state on a ferromagnetic surface stores information. The information is read optically and written by combining magnetic and optical methods. Magneto-optical disc storage is non-volatile, sequential access, slow write, fast read storage used for tertiary and off-line storage. 3D optical data storage has also been proposed. Light induced magnetization melting in magnetic photoconductors has also been proposed for high-speed low-energy consumption magneto-optical storage. Paper data storage, typically in the form of paper tape or punched cards, has long been used to store information for automatic processing, particularly before general-purpose computers existed. Information was recorded by punching holes into the paper or cardboard medium and was read mechanically (or later optically) to determine whether a particular location on the medium was solid or contained a hole. Barcodes make it possible for objects that are sold or transported to have some computer-readable information securely attached. Relatively small amounts of digital data (compared to other digital data storage) may be backed up on paper as a matrix barcode for very long-term storage, as the longevity of paper typically exceeds even magnetic data storage. See also Notes References This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 22 January 2022. Further reading |
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[SOURCE: https://en.wikipedia.org/wiki/Ali_Khamenei] | [TOKENS: 15639] |
Contents Ali Khamenei Ali Hosseini Khamenei[c] (born 19 April 1939) is an Iranian cleric and politician who has served as the second supreme leader of Iran since 1989. He previously served as the third president of Iran from 1981 to 1989. His tenure as supreme leader, spanning 36 years, makes him the longest-serving head of state in the Middle East and the longest-serving Iranian leader since Shah Mohammad Reza Pahlavi. Born into the Khamenei family, he studied at a hawza in his hometown Mashhad, later settling in Qom in 1958, where he attended the classes of Ruhollah Khomeini. Khamenei became involved in opposition to Mohammad Reza Pahlavi, the shah of Iran, and was arrested six times before being exiled for three years by the Shah's regime. Khamenei was a mainstream figure in the 1978–1979 Iranian Revolution, and upon its success, held many posts in the newly established Islamic Republic of Iran. In the aftermath of the revolution, he was the target of an attempted assassination that paralysed his right arm. There have been continued assassination threats against Khamenei by Israel. Khamenei served as the third president of Iran from 1981 to 1989 during the Iran–Iraq War, when he also developed close ties to the Islamic Revolutionary Guard Corps (IRGC). After the death of Khomeini in 1989, Khamenei was elected supreme leader by the Assembly of Experts. As supreme leader, Khamenei supported Iran's nuclear program for civilian use while issuing a fatwa forbidding the production of weapons of mass destruction. Khamenei favoured economic privatization of state-owned industries and, with oil and gas reserves, transformed Iran into an "energy superpower". His foreign policy has centered on Shia Islamism and exporting the Iranian Revolution. Khamenei played a pivotal role in the development of the Islamic Revolutionary Guard Corps (IRGC), transforming it into a primary tool for domestic control and regional influence. Under Khamenei, Iran supported the "Axis of Resistance" coalition in the Syrian civil war, War in Iraq, Yemeni civil war and the Gaza war, as well as Russia during Russo-Ukrainian war. A staunch critic of Israel and of Zionism, Khamenei has supported the Palestinians in the Israeli–Palestinian conflict; his rhetoric has included calls for Israel's destruction and antisemitic tropes. Under Khamenei, Iran has been involved in proxy wars with Israel and Saudi Arabia; in 2025, tensions with Israel escalated to a 12-day armed conflict. Identified as a pragmatic hardliner, Khamenei has sidelined leftist factions, moderate clerics, and political dissidents, while occasionally easing restrictions when the regime's stability or legitimacy has been threatened. His leadership has been closely associated with the expansion of state militarization and the consolidation of power within the office of the Supreme Leader. Khamenei has also faced many protests, including the 1999 Iranian student protests, the 2009 Iranian presidential election protests, the 2011–2012 Iranian protests, the 2017–2018 Iranian protests, the 2018–2019 Iranian general strikes and protests, the 2019–2020 Iranian protests, the Mahsa Amini protests, and the 2025–2026 Iranian protests. Journalists, bloggers and other individuals have been put on trial in Iran for the charges of insulting Supreme Leader Khamenei, often in conjunction with blasphemy charges. Their sentences have included lashing and jail time; some of them have died in custody. He is also known by the title Ayatollah and is considered one of the leading Shia Muslim marja' in the world. Khamenei's critics view him as a repressive despot responsible for repression, mass murders and other acts of injustice. Early life and education Ali Khamenei was born on 19 April 1939 to Javad Khamenei, an Alim and Mujtahid born in Najaf, Iraq, and Khadijeh Mirdamadi (daughter of Hashem Mirdamadi) in Mashhad. Khamenei is the second of eight children. Two of his brothers are also clerics; his younger brother, Hadi Khamenei, is a newspaper editor and cleric. His elder sister Fatemeh Hosseini Khamenei died in 2015, aged 89. His father was an ethnic Azerbaijani from Khamaneh, while his mother was an ethnic Persian from Yazd. Some of his ancestors are from Tafresh in today's Markazi Province and migrated from their original home in Tafresh to Khamaneh near Tabriz. Khamenei's ancestor was Sayyid Hossein Tafreshi, a descendant of the Aftasi Sayyids supposedly reaching to Sultan ul-Ulama Ahmad, known as Sultan Sayyid, a grandchild of the fourth Shia Imam, Ali al-Sajjad. Khamenei's education began at the age of four, by learning the Quran at Maktab; he spent his basic and advanced levels of seminary studies at the hawza of Mashhad, under mentors such as Sheikh Hashem Qazvini and Ayatollah Milani. Then, he went to Najaf in 1957, but soon returned to Mashhad due to his father's unwillingness to let him stay there. In 1958, he settled in Qom, where he attended the classes of Seyyed Hossein Borujerdi and Ruhollah Khomeini. Like many other politically active clerics at the time, Khamenei was far more involved with politics than religious scholarship. Early political career (1960s–1981) According to his official website, Khamenei was arrested six times before being exiled for three years during the reign of Mohammad Reza Pahlavi. Khamenei was a key figure in the Iranian Revolution in Iran and a close confidant of Ruhollah Khomeini. Since the founding of the Islamic Republic, Khamenei has held many government posts. Khamenei has been head of the servants of Astan Quds Razavi since 14 April 1979. Muhammad Sahimi asserted that his political career began after the Iranian Revolution, when the former President of Iran, Akbar Hashemi Rafsanjani, then a confidant of Khomeini, brought Khamenei into Khomeini's inner circle. Later on, Hassan Rouhani, then a member of Parliament, arranged for Khamenei to get his first major post in the provisional revolutionary government as deputy defense minister. In 1980, after the resignation of Hussein-Ali Montazeri from the position, Ruhollah Khomeini appointed Ali Khamenei to the position of Tehran's Friday Prayers Imam. Khamenei was briefly the Vice Minister of National Defence from late July to 6 November 1979 and as a supervisor of the Islamic Revolutionary Guards. He also served on the battlefield as a representative of the Iranian Parliament's Defense Commission. Khamenei narrowly escaped assassination by the Mujahedin-e Khalq when a bomb, concealed in a tape recorder, exploded beside him. On 27 June 1981, while Khamenei had returned from the frontline, he went to the Aboozar Mosque according to his Saturday schedule. After the first prayer, he lectured to worshippers who had written their questions on paper. Meanwhile, a young man who pressed a button put a tape recorder accompanied by papers on the desk in front of Khamenei. After a minute, the recorder began whistling, then suddenly exploded. "A gift of Furqan Group to the Islamic Republic" was written on the inner wall of the tape recorder. Khamenei's treatment took several months and his arm, vocal cords and lungs were seriously injured. He was permanently injured, losing the use of his right arm. Presidency (1981–1989) In 1981, after the assassination of Mohammad-Ali Rajai, Khamenei was elected President of Iran by a landslide vote (97%) in the October 1981 Iranian presidential election in which only four candidates were approved by the Council of Guardians. Khamenei became the first cleric to hold office. Ruhollah Khomeini had originally wanted to keep clerics out of the presidency, but later changed his views. In the 1985 Iranian presidential election, where only three candidates were approved by the Council of Guardians, Ali Khamenei was reelected as President of Iran, receiving 87% of the votes. In his presidential inaugural address, Khamenei vowed to eliminate "deviation, liberalism, and American-influenced leftists". According to the Iran Chamber, vigorous opposition to the government, including nonviolent and violent protest, assassinations, guerrilla activity and insurrections, was answered by state repression and terror in the early 1980s, both before and during Khamenei's presidency. Thousands of rank-and-file members of insurgent groups were killed, often by revolutionary courts. By 1982, the government announced that the courts would be reined in, although various political groups continued to be repressed by the government in the first half of the 1980s. Khamenei was one of Iran's leaders during the Iran–Iraq War in the 1980s and developed close ties with the now-powerful Revolutionary Guards. The Revolutionary Guards have been deployed to suppress opposition to the Islamic Republic of Iran. As president, he had a reputation for being deeply interested in the military, budget and administrative details. After the Iraqi Army was expelled from Iran in 1982, Khamenei became one of the main opponents of his own decision to counter-invade into Iraq, an opinion Khamenei shared with Prime Minister Mir-Hossein Mousavi, with whom he would later conflict during the 2009 Iranian presidential election protests. In its 10 April 1997 ruling regarding the Mykonos restaurant assassinations, the German court issued an international arrest warrant for Iranian intelligence minister Ali Fallahian, after declaring that the assassination had been ordered by him with knowledge of Khamenei and Rafsanjani. Iranian officials, however, have categorically denied their involvement. The then-Iranian Parliament speaker Ali Akbar Nategh-Nouri dismissed the ruling as political, untrue and unsubstantiated. The ruling led to a diplomatic crisis between the governments of Iran and several European countries, which lasted until November 1997. The accused assassins, Darabi and Rhayel, were finally released from prison on 10 December 2007 and deported back to their home countries. Supreme Leader (1989–present) In 1989, Ayatollah Khomeini dismissed Ayatollah Montazeri as his political successor, giving the position to Khamenei instead. Because Khamenei was neither a marja' nor an ayatollah, the Assembly of Experts had to modify the constitution to award him the position of Iran's new Supreme Leader (a decision opposed by several grand ayatollahs). Khamenei officially succeeded Ruhollah Khomeini after Khomeini's death, being elected as Acting Supreme Leader by the Assembly of Experts on 4 June 1989. Initially, some members of the Assembly of Experts proposed the idea of a leadership council. Various lists were proposed, and Khamenei was named in all of them. For instance, a council of three members, Ali Meshkini, Abdul-Karim Mousavi Ardebili and Khamenei, was proposed to lead Iran. According to Rafsanjani, he and Khamenei were against the proposal, while Ayatollah Haeri Shirazi [fa] and Ayatollah Ebrahim Amini were in favor of it. Supporters of the council proposal believed that having a council would produce a higher degree of unity in society and that more positive characteristics would be found in a council. In contrast, the opposers believed that an individual leader was more efficient according to past experiences in the case of the Judiciary Council. Ebrahim Amini listed the summary of the reasons presented by the two sides. According to him, the opposers rejected the proposal because: I) Evidence for Guardianship of the Islamic Jurist was true only for the guardianship of an individual, and it was not clear who held the guardianship when there was a council. The guardianship of a council was not rooted in Hadiths and Islamic jurisprudence. II) Previous council-type organizations, such as the broadcasting council and the supreme judicial council, were not successful in practice, and the leadership council would not do well for similar reasons. III) People were accustomed to the leadership of an individual, and a council of leaders was something unfamiliar to them. IV) An individual leader could act more decisively when dealing with critical and essential decisions and solving problems and crises. On the other hand, the supporters of the proposal believed that: I) At the time, there were no Faqīh equal to Khomeini or even two or three levels lower than him so that he could fulfill the expectation of people. II) In the case of a council of leaders, the members could compensate each other if any of them had a shortage in a field. Finally, 45 members voted against the leadership council proposal while more than 20 people were in favor of it and the proposal was rejected. After the assembly rejected the idea of a Leadership Council, Khamenei was elected Leader by 60 of the 74 members present with Grand Ayatollah Mohammad-Reza Golpaygani receiving the remaining 14 votes. Although he eventually accepted the post, Khamenei made protestations of his unworthiness, saying "my nomination should make us all cry tears of blood", and debated with the mujtahids of the Assembly. Since Khamenei was not a marja' at the time—which the Iranian constitution required—he was named as the temporary Supreme Leader. Later, the constitution was amended to remove that requirement, and the Assembly of Experts reconvened on 6 August 1989 to reconfirm Khamenei with 60 votes out of 64 present. On 29 April 1989, responding to the letter of Ayatollah Ali Meshkini, the head of committee responsible for revising the Constitution, asking Khomeini's viewpoint regarding the Marja' criteria, Khomeini said: "From the very beginning, I believed and insisted that there is no need for the requirements of marja'iyyat (authority in jurisprudence). A pious mujtahid (jurist-intellectual), who is approved by the esteemed Assembly of Experts (Majlis-i Khobregan), will suffice". In a video that surfaced during the 2017–2018 Iranian protests, Khamenei is seen before the assembly saying he was not religiously qualified to be a Supreme Leader. Khamenei, who was ranked as a Hujjat al-Islam and not a marja' as required by the Iranian constitution, said he would only be a "ceremonial leader", and was reassured by Akbar Hashemi Rafsanjani that the position would be "temporary" until a referendum, apparently planned for one year later. Following a constitutional referendum held on 28 July 1989 which removed the marja' requirement, Khamenei was officially elected by the Assembly of Experts as the official permanent Supreme Leader over a week later on 6 August. On 29 August 2022, Kazem al-Haeri announced his resignation from the position of marja due to old age and illness. This was described as the first time in history a marja has ever resigned from his position. He called on his followers to follow Ali Khamenei, Supreme Leader of Iran as "the best person for the leadership of our people and removing the aggressors". Khamenei's era has differed from that of his predecessor. He has, however, continued Khomeini's policy of "balancing one group against another, making sure that no single side gains too much power". But lacking Khomeini's charisma and clerical standing, he has developed personal networks, first inside the armed forces and then among the clerics, while administering the major bonyads and seminaries of Qom and Mashhad. Having been Supreme Leader for three decades, Khamenei has been able to place many loyalists throughout Iran's major institutions, "building a system that serves and protects him". Former cleric Mehdi Khalaji and Saeid Golkar, describe Khamenei's system as having creating a "parallel structure" for each of the country's institutions (army, intelligence agencies, etc.) to keep those institutions weak. According to Vali Nasr of the Johns Hopkins School of Advanced International Studies, "[Khamenei] [took] many of the powers of the presidency with him and [turned] the office of the supreme leader into the omnipotent overseer of Iran's political scene". In Nasr's view, Khamenei is an "unusual sort of dictator". Officials under Khamenei influence the country's various powers, and sometimes bickering, institutions, including "the parliament, the presidency, the judiciary, the Revolutionary Guards, the military, the intelligence services, the police agencies, the clerical elite, the Friday prayer leaders and much of the media", as well as various "nongovernmental foundations, organizations, councils, seminaries and business groups". Khamenei issues decrees and makes the final decisions on the economy, environment, foreign policy and everything else in Iran. Khamenei regularly meets with the president, cabinet members, head and officials of the judiciary branch, parliamentarians, among others, and tells them what to do. Khamenei has also fired and reinstated presidential cabinet appointments. Khamenei meets with foreign dignitaries, but he does not travel internationally; anyone wishing to see him must travel to Iran. Apart from his time in Najaf as a student, Khamenei traveled to Libya during his time as president. In his speeches, Khamenei regularly mentions many familiar themes of the 1979 revolution: justice, independence, self-sufficiency, Islamic government and resolute opposition to Israel and the United States, while rarely mentioning other revolutionary ideals such as democracy and greater government transparency. According to Karim Sadjadpour of the Carnegie Endowment for International Peace, Khamenei has "resisted Rafsanjani's attempts to find a modus vivendi with the United States, Khatami's aspirations for a more democratic Islamic state, and Ahmadinejad's penchant for outright confrontation." In 2007, Khamenei called for privatising state-owned companies, including the telephone company, three banks and dozens of small oil and petrochemical enterprises. After a few months, at a televised meeting with then-President Mahmoud Ahmadinejad and his Cabinet ministers, important clerics, the leader of parliament and provincial governors, the heads of state broadcasting and the Iranian chamber of commerce, Khamenei ordered: "to pass some laws, sell off some businesses, and be quick about it". Khamenei warned that "those who are hostile to these policies are the ones who are going to lose their interests and influence". In 1994, after the death of Grand Ayatollah Mohammad Ali Araki, the Society of Seminary Teachers of Qom declared Khamenei a new marja. Several ayatollahs, however, declined to recognize him as such. Some of those dissident clerics included Mohammad Shirazi, Hossein-Ali Montazeri, Hassan Tabatabai-Qomi, and Yasubedin Rastegar Jooybari. In 1997, for example, Montazeri "questioned the powers of the Leader" and was subsequently punished for his comments with the closure of his religious school, an attack on his office in Qom, and a period of house arrest. The table below lists some of the incumbent senior officeholders in Iran directly appointed by the supreme leader (sorted by date of appointment): Khamenei has developed a cult of personality, with supporters describing him as a "divine gift to mankind" and in which critics of him are persecuted. Iran's former Chief Justice Sadiq Larijani, a Khamenei appointee, has warned the president of Iran against voicing opposition to Khamenei. According to Karim Sadjadpour of the American Carnegie Endowment for International Peace, several factors have strengthened Khamenei in recent years: 1) A vast network of commissars stationed in strategic posts throughout government bureaucracies, dedicated to enforcing his authority; 2) the weak, conservative-dominated parliament, headed by Khamenei loyalist Gholam-Ali Haddad-Adel (whose daughter is married to the Leader's son); 3) the rapidly rising political and economic influence of the Islamic Revolutionary Guards, whose top leaders are directly appointed by Khamenei and have always been publicly obedient to him; 4) the political disengagement of Iran's young population ...; and 5) most significant[ly], the 2005 presidential election, which saw hardliner Mahmoud Ahmadinejad trounce Khamenei's chief rival ... Hashemi Rafsanjani ... According to Christopher Dickey, to consolidate his power base, Khamenei has developed close relations with the security and military establishment while also expanding the bureaucracy inside the government and around his Beit Rahbari compound. Writing in The Daily Telegraph, Damien McElroy and Ahmad Vahdat observed: "The ayatollah likes to cultivate an image of austerity but receives major commissions from the Iranian oil and arms industries and there have been regular claims that he and his son have amassed a fortune running into billions of dollars." A six-month investigation by Reuters has said that Khamenei controls a "financial empire" worth approximately US$95 billion that the Iranian Parliament does not oversee, a figure much larger than the estimated wealth of the late Shah of Iran Mohammad Reza Pahlavi. According to the Reuters investigation, Khamenei uses the assets of a company called Headquarters for Executing the Order of the Imam or "Setad" in Farsi to increase his grip on power. Reuters "found no evidence that Khamenei is tapping Setad to enrich himself", but did find that he used Setad's funds, which "rival the holdings of the shah", for political expedience – "Setad gives him the financial means to operate independently of parliament and the national budget, insulating him from Iran's messy factional infighting". According to The Daily Telegraph, money from Setad is used to fund Khamenei's Beit Rahbari compound, which employs over 500 stewards, as was reported in 2013. Hamid Vaezi, Setad's head of public relations, said the information "was far from realities and is not correct". The six-month investigation by Reuters found that, regarding the source of Setad's funds, "Setad built its empire on the systematic seizure of thousands of properties belonging to ordinary Iranians: members of religious minorities like Vahdat-e-Hagh, who is Baha'i, as well as Shi'ite Muslims, business people and Iranians living abroad." Despite the negative accounts of Western sources, Iranian official authorities depict Setad as a vast charity foundation. In an interview in October 2014 with Islamic Republic News Agency, Muhammad Mukhber, the head of Setad, stated that over 90% of profits from Setad business activities are spent on improving infrastructure in the poor regions of the country, creating jobs and improving the well-being of people in these regions reflecting the top concerns of Iran's Supreme Leader, Khamenei for the Iranian society. He cited the construction of several hundred schools, mosques, and hussainiyas, as well as direct and indirect contributions to the formation of over 350,000 jobs, expecting a total of 700,000 for the upcoming three years. Mukhber also cited a sum total grant of 2.21 trillion rials of Qard al-Hasan, interest-free loans, to 41,000 families in poor regions of the country. He also revealed plans for a gradual sell-off of Setad's profitable businesses on the stock market, with the aim of transferring their ownership into the hands of the Iranian people. He also envisioned the construction and delivery of 17,000 housing units to families in poor regions of Iran by 2018. In mid-August 2009, a group of unnamed former reformist lawmakers appealed to the Assembly of Experts – the constitutional body charged with electing and (in theory) supervising and removing the Leader – to investigate Leader Ali Khamenei's qualification to rule. A week later another anonymous letter was issued "calling Iran's leader a dictator and demanding his removal", this one by a group of Iranian clerics. The letters were called a blow to Khamenei's "status as a neutral arbiter and Islamic figurehead" and an "unprecedented challenge to the country's most powerful man" though not a blow to his actual power as a leader. The New York Times reported "the phrase "death to Khamenei" has begun appearing in graffiti on Tehran walls, a phrase that would have been almost unimaginable not long ago". The letter was addressed to the head of the Assembly of Experts, Ayatollah Akbar Hashemi Rafsanjani, a "powerful former president" who also questions the election results. According to the Associated Press, it is unlikely the letter's demands would be met as "two-thirds of the 86-member assembly are considered strong loyalists of Khamenei and would oppose" any investigation of him. According to The New York Times reporting in mid-August 2009, a "prominent Iranian cleric and a former lawmaker said on Sunday (16 August) that they had spoken to some of the authors and had no doubt the letter was genuine". According to this cleric, the letter's signatories number "several dozen, and are mostly midranking figures from Qum, Isfahan and Mashhad", and that "the pressure on clerics in Qum is much worse than the pressure on activists because the establishment is afraid that if they say anything they can turn the more traditional sectors of society against the regime". Early in his presidency, Ahmadinejad was sometimes described as "enjoy[ing] the full backing" of the Supreme Leader Ali Khamenei, and even as being his "protégé". In Ahmadinejad's 2005 inauguration the supreme leader allowed Ahmadinejad to kiss his hand and cheeks in what was called "a sign of closeness and loyalty", and after the 2009 election fully endorsed Ahmadinejad against protesters. However, as early as January 2008 signs of disagreement between the two men developed over domestic policies, and by the period of 2010–2011 several sources detected a "growing rift" between them. The disagreement was described as centered on Esfandiar Rahim Mashaei, a top adviser and close confidant of Ahmadinejad. Mashaei was vice president of Iran until being ordered to resign from the cabinet by the supreme leader, and was also an opponent of "greater involvement of clerics in politics". In 2009, Ahmadinejad dismissed Intelligence Minister Gholam-Hossein Mohseni-Eje'i, an opponent of Mashaei. In April 2011, another Intelligence minister, Heydar Moslehi, resigned after being asked to do so by Ahmadinejad, but was reinstated by the supreme leader within hours. Ahmadinejad declined to officially back Moslehi's reinstatement for two weeks and in protest engaged in an "11-day walkout" of cabinet meetings, religious ceremonies, and other official functions. Ahmadinejad's actions led to angry public attacks by clerics, parliamentarians and military commanders, who accused him of ignoring orders from the supreme leader. Conservative opponents in parliament launched an "impeachment drive" against him, four websites with ties to Ahmadinejad reportedly were "filtered and blocked", and several people "said to be close" to the president and Mashaei (such as Abbas Amirifar and Mohammed Sharif Malekzadeh) were arrested on charges of being "magicians" and invoking djinns. On 6 May 2011, it was reported that Ahmadinejad had been given an ultimatum to accept the leader's intervention or resign, and on 8 May he "apparently bowed" to the reinstatement, welcoming back Moslehi to a cabinet meeting. The events have been said to have "humiliated and weakened" Ahmadinejad. However, the president denied that there had been any rift between the two, and according to the semiofficial Fars News Agency, he stated that his relationship with the supreme leader "is that of a father and a son". In 2012, Khamenei ordered a halt to a parliamentary inquiry into Ahmadinejad's mishandling of the Iranian economy. In 2016, Khamenei advised Mahmoud Ahmadinejad, his former ally with whom his relationship was strained after Ahmadinejad accused his son Mojtaba Khamenei of embezzling from the state treasury, to not run for president again. Khamenei rejected talks for referendums on the state's future, questioning people's judgment and causing public outrage. In 2024, he claimed that while speaking to his military he had been saying what words God put in his tongue. Khamenei has reportedly issued a fatwa saying the production, stockpiling, and use of nuclear weapons was forbidden under Islam. The fatwa was cited in an official statement by the Iranian government at an August 2005 meeting of the International Atomic Energy Agency (IAEA) in Vienna. It's been widely discussed by international officials and specifically recognized by the US administration. The Iranian official website for information regarding its nuclear program has provided numerous instances of public statements by Khamenei wherein he voices his opposition to the pursuit and development of nuclear weapons in moral, religious and Islamic juridical terms. Khamenei's official website specifically cites a 2010 version of these statements in the fatwa section of the website in Farsi as a fatwa on "Prohibition of Weapons of Mass Destruction". Doubts have been cast by experts on the existence of the fatwa as it can be changed or modified as and when deemed necessary, as well as doubts on its authenticity, its impact, and its apparently religious nature. Gareth Porter believes that the fatwa is "sincere" and Gholam-Hossein Elham commented that it will not change. In 2000, Khamenei sent a letter to the Iranian parliament forbidding the legislature from debating a revision of the Iranian press law to allow more press freedom. He wrote: "The present press law has prevented this big plague. The draft bill is not legitimate and in the interests of the system and the revolution". Earlier in 1996, he issued a fatwa stating, "The promotion of music [both traditional and Western] in schools is contrary to the goals and teachings of Islam, regardless of age and level of study". Many music schools were closed and public (but not private) music instruction to children under 16 was banned thereafter. In 1999, Khamenei had issued a fatwa stating that it was permitted to use a third party (donor sperm, ova or surrogacy) in fertility treatments. This was different in "both style and substance" from the fatwa on Assisted Reproductive Technology (ART) by Gad El-Hak Ali Gad El-Hak of Egypt's Al-Azhar University in the late 1980s, which permitted ART (IVF and similar technologies) as long as there is no third-party donation (of sperm, eggs, embryos, or uteruses). In 2002, Khamenei ruled that human stem cell research was permissible under Islam, with the condition that it be used to create only parts instead of a whole human. Also in 2002, after protests erupted in the capital, Khamenei intervened against the death sentence given to Hashem Aghajari for arguing that Muslims should re-interpret Islam rather than blindly follow leaders. Khamenei ordered a review of the sentence against Aghajari, which was later commuted to a prison sentence. Since becoming the supreme leader of Iran in 1989, Khamenei has issued annual messages on the occasion of Hajj for all Muslims (pilgrims). He continually invites all Muslims to Tawhid, and expresses the significance of Hajj in spiritual and social life. He also asks the Muslims to be aware of what he considers "the conspiracy of the enemies" by having a right comprehension and advises them to "not be deceived by them". So far,[when?] he has issued 32 messages. A part of his 6 August 2019 message was as follows: The ritual of Bara'ah which means refusing every instance of mercilessness, cruelty, wrongdoing and corruption of the tyrants of any time, and rising against intimidation and extortion by the arrogant throughout history, is one of the great blessings of Hajj, and an opportunity for oppressed Muslim nations. Khamenei was one of the Ulama signatories of the Amman Message, which gives a broad foundation for defining Muslim orthodoxy. As well as elaborating on the factors needed to create Islamic unity, he argued: "neither the Shia Muslims allied with the British MI6 are Shias, nor the Sunni mercenaries of the American CIA are Sunnis, as they are both anti-Islamic". In 2010, Khamenei issued a fatwa that bans any insult to the Sahabah (companions of Muhammad) as well as Muhammad's wives. The fatwa was issued to reconcile legal, social, and political disagreements between Sunni and Shia. In 2017, he issued a fatwa against women riding bicycles in public. During the 2025-2026 Iranian protests Khamenei was the center of public outrage, with protesters chanting "Death to the dictator!", "Death to Khamenei," and "This year is the year of blood, Khamenei will be overthrown," Additionally, multiple pictures and videos were circulated on social media showing women lighting cigarettes with a burning picture of the Supreme Leader, an act considered a serious offence in Iranian law, thus expressing "a direct challenge to the country's political and religious authority", according to NDTV. In response to the protests, Khamenei acknowledged in public remarks that many protesters' economic grievances, such as inflation, the collapsing rial, and hardships faced by shopkeepers, were legitimate. At the same time, he drew a distinction between "protesters" and "rioters", stating that "rioters must be put in their place", and he authorized or encouraged a hardline security response. During the demonstrations, which took place under a nationwide internet blackout, Iranian security forces carried out mass killings of protesters. At least 500 protesters were confirmed killed, and available evidence suggests that the real number may exceed 2,000. According to Iran International, the lethal crackdown on the protesters was carried out following direct orders from Khamenei, with the knowledge and approval of senior state authorities. On 17 January 2026, Khamenei publicly acknowledged for the first time that "several thousand" individuals had died amid recent nationwide protests. He attributed the violence and chaos to "external enemies," specifically the United States and Israel, accusing them of orchestrating the unrest and providing arms to demonstrators. Intelligence reports from early January 2026 indicate that Khamenei has reportedly developed a "Plan B" to evacuate to Moscow in the event that internal unrest leads to the fall of his regime. Domestic policy Within Iran, Khamenei is the most powerful political authority. He is the head of state of Iran, the commander-in-chief of its armed forces, and can issue decrees and make the final decisions on the main policies of the government in economy, the environment, foreign policy, and national planning in Iran. As supreme leader, Khamenei has either direct or indirect control over the executive, legislative, and judicial branches of government, as well as the military and media. All candidates for the Assembly of Experts, the presidency and the Majlis (Parliament) are vetted by the Guardian Council, whose members are selected directly or indirectly by the Supreme Leader of Iran. There have also been instances when the Guardian Council reversed its ban on particular people after being ordered to do so by Khamenei. Some regard Khamenei as the figurehead of the country's conservative establishment. Khamenei supported Mesbah Yazdi, describing him as one of Iran's most credible ideologues before the 2005 election but "recently been concerned about Mesbah's political ambitions". In 2007, Khamenei requested that government officials speed up Iran's move towards economic privatisation. Its last move towards such a goal was in 2004, when Article 44 of the constitution was overturned. Article 44 had decreed that Iran's core infrastructure should remain state-run. Khamenei also suggested that ownership rights should be protected in courts set up by the Justice Ministry; the hope was that this new protection would give a measure of security to and encourage private investment. In 2007, Iranian police under the direction of Khamenei launched a "Public Security Plan", arresting dozens of "thugs" to increase public security. Additionally, Khamenei has stated that he believes in the importance of nuclear technology for civilian purposes because "oil and gas reserves cannot last forever". On 30 April 2008, Ali Khamenei backed President Mahmoud Ahmadinejad's economic policy and said the West was struggling with more economic difficulties than Iran, with a "crisis" spreading from the United States to Europe, and inflation was a widespread problem. The Iranian leader said that the ongoing economic crisis, which has debilitated the world, has been unprecedented in the past 60 years. He said: "This crisis has forced the UN to declare state of emergency for food shortages around the globe but foreign radios have focused on Iran to imply that the current price hikes and inflation in the country are the results [sic] of carelessness on the part of Iranian officials which of course is not true." Khamenei emphasized that no one has the right to blame the Iranian government for Iran's economic problems. He also advised people and the government to be content and avoid waste to solve economic problems. He added: "I advise you to keep in your mind that this great nation is never afraid of economic sanctions." As Supreme Leader, Khamenei has influence over elections in Iran since the Constitution of Iran allows him to appoint half of the members of the Guardian Council and the Chief Justice of Iran. The Constitution also establishes that the Council approves or disqualifies candidates for office. At the same time, the Chief Justice presents the other half of the members of the council to be selected by Parliament. These constitutional provisions give Khamenei direct and indirect influence over the council; an entity that, in turn, has direct influence over who can run for government. This influence was evident in the 2004 parliamentary elections, in which the Guardian Council disqualified thousands of candidates from running — including 80 incumbents, many of the reformist members of Parliament, and all the candidates of the Islamic Iran Participation Front party. Subsequently, the Conservatives won about 70% of parliamentary seats. The election became a key turning point in the country's political evolution as it marked the end of the campaign for political and social reform initiated by former President Mohammad Khatami. During the 2005 presidential election, Khamenei's comments about the importance of fighting corruption, being faithful to the ideals of the Islamic revolution, as well as on the superior intelligence and dynamism of those who studied engineering, were interpreted by some as a subtle endorsement of Mahmoud Ahmadinejad (who had a PhD in traffic engineering). After the election, and until recently, Khamenei was outspoken in his support for Ahmadinejad, and "defended him publicly in ways which he never" had reformist president Khatami. Khamenei would later certify the results of the 2009 Iranian presidential election. Khamenei took a firm stand against the 2009–2010 Iranian election protests, and stated that he would neither reconsider vote results nor bow to public pressure over the disputed reelection of President Mahmoud Ahmadinejad. He said: "By Allah's favor, the presidential election was accurately held, and the current matters should be pursued legally". In a public appearance on 19 June, he expressed his support for the declared winner, Ahmadinejad. He accused foreign powers — including Britain, Israel, and the United States — of helping foment protests against the election results. In particular, he singled out Britain, perceiving the country as the "most evil" of its enemies. He said that the Iranian people would respond with an "iron fist" if Western powers meddle in Iran's internal affairs. In response to reformist gains in the 2015–2016 election cycle, Khamenei lamented the loss of conservative clerics from the Assembly of Experts and suggested changes to the law by which the Guardian Council vets candidates may be needed because it is currently too difficult for the Guardian Council to vet so large a number of candidates. Khamenei has been supportive of scientific progress in Iran. He was among the first Islamic clerics to allow stem cell research and therapeutic cloning. In 2004, Khamenei said that the country's progress is dependent on investment in the field of science and technology. He also said that attaching a high status to scholars and scientists in society would help talents to flourish and science and technology to become domesticated, thus ensuring the country's progress and development. Foreign policy Khamenei has "direct responsibility" for foreign policy, which "cannot be conducted without his direct involvement and approval". He has a foreign policy team independent of the president's, "which includes two former foreign ministers" and "can at any time of his choosing inject himself into the process and "correct" a flawed policy or decision". His foreign policy is said to steer a course that avoids either confrontation or accommodation with the West. Khamenei condemned the Saudi Arabian-led intervention in Yemen and compared Saudi Arabia to Israel. Khamenei also condemned the persecution of Rohingya Muslims in Myanmar and called Myanmar's de facto leader and Nobel Peace Prize laureate Aung San Suu Kyi a "brutal woman". U.S. Secretary of State Mike Pompeo criticised Khamenei for his refusal to condemn the Xinjiang internment camps and human rights abuses against the Uyghurs in China. He condemned the United Arab Emirates as "useless" on several occasions. After the U.S.'s 2018 withdrawal from the Iran nuclear deal, the 2020 assassination of Qasem Soleimani and the 2021 election of the conservative Ebrahim Raisi (who was supported by Khamenei) as president, Iran has taken a geopolitical course of further aligning with Russia and China. This became more evident in mid-2022 when Iran started supplying its HESA Shahed 136 drones to the Russian Armed Forces to be used against Ukraine. Coupled with Iran's support for attacks on American forces throughout the Middle East after the 2023 October 7 attacks and the decades-long military and nuclear collaboration between North Korea and Iran, these developments have led a number of critics to speak of a new Iran-Russia-China-North Korea "Axis of Upheaval".[verification needed] Khamenei supported the Iranian intervention in the Syrian civil war. The United States and Iran have had no formal diplomatic relations since the Iran hostage crisis of 1980 when US embassy was taken over and US diplomats were taken prisoner. According to a study by Karim Sadjadpour, speeches by Khamenei regularly mention the principle of resolute opposition to the United States. Sadjadpour also argued that Khamenei has "resisted Rafsanjani's attempts to find a modus vivendi with the United States", and once told reformist president Mohammad Khatami that "we need the United States as an enemy". On 4 June 2006, Khamenei said that Iran would disrupt energy shipments from the Persian Gulf region, where about 20% of the world's daily supply of oil passes from the Persian Gulf through the Strait of Hormuz very close to Iran's coast, should the country come under attack from the US, insisting that Tehran will not give up its right to produce nuclear fuel. On 14 September 2007, on the first Friday prayer of Ramadan, Khamenei, who asserts that the United States is the main cause of insecurity in Iraq, predicted that George W. Bush and American officials would one day be tried in an international criminal court to be held "accountable" for the US-led Iraq War. On 21 March 2009, a day after US President Barack Obama advocated a "new beginning" in diplomatic relations between the two countries, Khamenei said a change of US "words" was not enough and added: "We will watch and we will judge (the new US administration) ... You change, our behavior will change". He rejected US foreign policy since the Islamic revolution, insisted the United States is "hated in the world" and should end its interference in other countries. Khamenei criticised the NATO-led 2011 military intervention in Libya. On 21 March 2011, Khamenei accused the West of "coming after Libyan oil". He also stressed that "Iran utterly condemns the behavior of the Libyan government against its people, the killings and pressure on people, and the bombing of its cities... but it (also) condemns the military action in Libya." Khamenei stated that he supports sending mediators rather than bombing the country. In June 2011, Khamenei accused the United States government of terrorism and rejected the American definition of terrorism; he was quoted as saying, "The U.S. and the European governments that follow it describe Palestinian combatant groups who fight for the liberation of their land as terrorists." In June 2012, Khamenei warned Western governments that the mounting sanctions on the country would only deepen the Iranians' hatred of the West. In October 2014, Khamenei said the U.S. and the U.K. created ISIS as a tool to fight Iran and "create insecurity" in the region. On 19 July 2015, while speaking at a mosque in Tehran, Khamenei said to his supporters that the policies of the United States in the region were "180 degrees" opposed to Iran's political and religious movement. The speech was punctuated by chants of "Death to America" and "Death to Israel". Khamenei said in regards to the 2015 nuclear deal, "Even after this deal, our policy towards the arrogant U.S. will not change". U.S. Secretary of State John Kerry said that if the comments reflected policy, it was "very disturbing", and "very troubling". On 24 June 2019, the United States imposed sanctions on Khamenei with the signing of Executive Order 13876. In March 2020, Khamenei warned against a United States offer of aid to fight COVID-19 because it could be a way to hurt Iran by further spreading the disease. He also suggested the US had developed a special variety of the virus "based on Iranian genetic information they have gathered", although he provided no evidence for the theory. Khamenei explained, "There are enemies who are demons, and there are enemies who are humans, and they help one another". In February 2024, it was announced that Meta Platforms had removed Khamenei's Facebook and Instagram accounts, citing repeated violations of its Dangerous Organizations and Individuals policy. In March 2022, Khamenei accused the United States of creating the conflict surrounding the Russo-Ukrainian War. After the September 11 attacks in 2001, Khamenei condemned the act and the attackers, and called for a condemnation of terrorist activities all over the world but warned strongly against a military intervention in Afghanistan. He is quoted as saying, "Mass killings of human beings are catastrophic acts which are condemned wherever they may happen and whoever the perpetrators and the victims may be". Khamenei is an opponent of the State of Israel and Zionism and has been criticized for making threats against Israel and for antisemitic rhetoric. On 15 December 2000, Khamenei called Israel a "cancerous tumor of a state" that "should be removed from the region". In 2013, he called Israel a "rabid dog", as well as in 2014, during the Gaza war, in response to the killing of Palestinian civilians. In 2014, a tweet from an account attributed to Khamenei claimed that there was no "cure" for Israel but its destruction. In a September 2008 sermon for Friday prayers in Tehran, Khamenei stated that "it is incorrect, irrational, pointless and nonsense to say that we are friends of Israeli people", for he believes that the occupation is done by means of them. "[U]surpation of houses, lands, and business [of Palestinian people] are carried out using these people. They are the background actors of Zionist elements," said Khamenei in his speech. "[W]e have no problem with Jews and Christians ... we have problem with the usurpers of Palestine [sic] land," he added. Also, he said that he had raised the issue "to spell an end to any debates". In 2013, Khamenei accused France of "kneeling" before Israel, while saying that Israel was led by people unworthy of the "title 'human'". Nevertheless, according to anti-regime change activist Abbas Edalat, in 2005, Khamenei responded to a remark by then-President Ahmadinejad which had been widely translated as saying that the "regime occupying Jerusalem should be wiped off the map" by saying that "the Islamic Republic has never threatened and will never threaten any country". In a September 2009 sermon, Khamenei was quoted as saying that "the Zionist cancer is gnawing into the lives of Islamic nations." In another report of the same speech, he stated that "we will support and help any nations, any groups fighting against the Zionist regime across the world, and we are not afraid of declaring this." Khamenei instead proposed that "Palestinian refugees should return and Muslims, Christians and Jews could choose a government for themselves, excluding immigrant Jews", adding, "No one will allow a bunch of thugs, lechers and outcasts from London, America and Moscow to rule over the Palestinians". On 10 September 2015, in a speech about Israel after agreement on the nuclear program of Iran, Khamenei made a remark "Israel will not exist in 25 years". For the first time, the remark was published in Khamenei's official website and his Twitter. This statement was reported as voted as the best and most important among Khamenei's statements in 2015 by an online poll conducted by his official website. On 21 February 2017, at the 6th International Conference in Support of the Palestinian Intifada, Khamenei regarded the withdrawal of Israel from south Lebanon in 2000 and from Gaza in 2005 as two major achievements so far. Also, he advised the Islamic countries to refrain from "useless" crises and differences and instead concentrate on the issue of Palestine, which he regarded as the core issue of Islam. He added: "Otherwise, the potentials and capabilities of the nations will go to waste in the face of vain struggles, which would provide opportunities for the Zionist regime to become even stronger." In September 2020, Khamenei condemned the peace agreement between Israel and the United Arab Emirates and charged the UAE with betraying the Islamic world, the Arab countries, and Palestine. He stated that the normalisation will be only temporary, but the UAE will forever have to bear the shame regarding the deal. In October 2023, Khamenei praised the October 7 attacks, but denied Iran's involvement. He condemned Israel's bombing of the Gaza Strip in retaliation for the Hamas attack and accused Israel of committing genocide against the Palestinian people in Gaza. Israel launched surprise attacks on key military and nuclear facilities in Iran on 13 June 2025, which started the Iran–Israel war. Israeli air and ground forces assassinated some of Iran's prominent military leaders, nuclear scientists, and politicians. and damaged or destroyed Iran's air defenses and some of its nuclear and military facilities. Iran retaliated with waves of missile and drone strikes against Israeli cities and military sites. The United States, which defended Israel against Iranian missiles and drones, took offensive action on the ninth day of the war by bombing three Iranian nuclear sites. Iran retaliated by firing missiles at a U.S. base in Qatar. On 24 June, Israel and Iran agreed to a ceasefire after insistence from the U.S. In the wake of this war, Khamenei was reportedly moved to a fortified underground bunker in Tehran with his family, where he remained largely isolated from external communication. Khamenei rejected U.S. president Trump's call for Iranian surrender. Khamenei was also subjected to threats of assassination by Trump, Israel's prime minister Benjamin Netanyahu, and defense minister Israel Katz. Katz stated in 2025 that his country wanted to kill Iran's Supreme Leader, Ali Khamenei, during the Iran–Israel war. Israeli Prime Minister Benjamin Netanyahu, in June 2025, said that he had not ruled out assassinating Khamenei in the future. US President Donald Trump reportedly vetoed an Israeli plan in June 2025 to kill Ali Khamenei. Following the Iran–Israel war ceasefire, he resurfaced on 26 June via a recorded clip to warn the United States against future attacks. Khamenei's isolation during the war, with access limited to his closest aides, complicated diplomatic efforts in Geneva by making him difficult to reach. Afterwards, Khamenei declared victory over Israel and threatened further attacks on American military bases, escalating tensions with the United States. In response, President Trump dismissed Khamenei's claims, telling him he had been decisively defeated. An Iran International article interviewed civilians, expressing disappointment in Khamenei during and after the war. One referred to him as a "coward" hiding in his bunker, another said Khamenei is living in an "illusion", believing Iran won the war and declaring victory. On 5 July 2025, Khamenei made his first public appearance since the war with Israel had begun. A 2006 speech of Khamenei contains the phrase that was translated into English as "the myth of the massacre of Jews". In a 2013 interview, Iran's then-Foreign Minister Javad Zarif said Khamenei had been mistranslated, and his comments were taken out of context. Zarif added: "I have spoken to the [supreme] leader on this issue, he rejects and condemns the killing of innocent people. No, the Holocaust is not a myth." On 21 March 2014, Khamenei said that "the Holocaust is an event whose reality is uncertain and if it has happened, it's uncertain how it has happened". Additionally, because of the potential legal consequences in some countries, he commented: "No one in European countries dares to speak about [the] Holocaust." He also said that in the West "speaking about [the] Holocaust and expressing doubts about it is considered to be a great sin." On Holocaust Memorial Day, 27 January 2016, Khamenei posted a Holocaust-denying video on his official website. The video, drawing on the March 2014 speech and lasting about three minutes, features images of Holocaust deniers Roger Garaudy, Robert Faurisson, and David Irving. In December 2019, Khamenei praised Garaudy (a convert to Islam) and said that Garaudy's conviction for Holocaust denial violated freedom of speech. In 2020, Khamenei tweeted asking "Why is it a crime to raise doubts about the Holocaust ... while insulting the Prophet (PBUH) is allowed?" Journalist Yair Rosenberg argues that statements by Khamenei purporting to attack "Zionism" are following an antisemitic tradition of avoiding censorship by using "Zionism" as a dog whistle for "Jews". For example, an 8 June 2022 statement tweeted by Khamenei reads: "The Zionists have always been a plague, even before establishing the fraudulent Zionist regime. Even then, Zionist capitalists were a plague for the whole world." According to Rosenberg, it makes more sense (although it is just as slanderous) if "Zionists" is replaced by "Jews". The Zionist movement was not founded until the late 19th century, and thus Zionists are not likely to "have always been a plague". Other accusations of antisemitism have come from Victoria Coates and Ellie Cohanim, who observe his Holocaust denial and find his "nine-point plan" to "wipe" Israel "off the face of the earth" uncomfortably reminiscent of Hitler's Final Solution; and The Jerusalem Post, who quote Khamenei's attack on the 2020 Israel–United Arab Emirates normalization agreement: "The nation of Palestine is under various, severe pressures. Then, the UAE acts in agreement with the Israelis and filthy Zionist agents of the U.S. — such as the Jewish member of Trump's family — with utmost cruelty against the interests of the World of Islam." They argue that "filthy Zionist agents", "the Jewish member of Trump's family" (i.e. Jared Kushner and his wife Ivanka Trump), and "cruel" are all words channeling "antisemitic tropes and dog whistles". Khamenei has written several open letters. To the Youth in Europe and North America was written on 21 January 2015. Khamenei wrote a second letter to the students enrolled at U.S. universities on 30 May 2024. While describing Israel's actions as "genocide and apartheid", Khamenei asked the students to continue their protests against what he called "brutal Zionist regime". In his letter, Khamenei expressed empathy and solidarity with the students protesting against Israel's attacks in Gaza. He referred to these students as a "branch of the Resistance Front" and predicted their victory with the "permission of God". Khamenei also runs a fund raising campaign for victims of conflicts in Gaza and Lebanon. Human rights, freedoms, protests, and Islamic law Critics have accused Khamenei of overseeing the assassination of as many as 160 exiled defectors worldwide, the heavy-handed repression of protesters, the killings of tens of thousands of members of the M.E.K. (People's Mujahedin of Iran) paramilitary group, and of making dissident writers and intellectuals in Iran "a special target" of repression, among other infractions of human rights. However, Khamenei himself has insisted human rights are a fundamental principle underlying Islamic teachings that precedes Western concern for human rights by many centuries. He has attacked Western powers who have criticized the rights record of the Islamic Republic for hypocrisy, saying that these countries economically oppress people in Third World countries and support despots and dictators. In response to Western complaints of human rights abuses in Iran he has stated that the American administration has committed many crimes and is therefore not fit to judge the Islamic Republic. There have been several major protests during Khamenei's reign, including the 1994 Qazvin Protests where according to Al-Arabiya around 40 people were killed and over 400 were injured, the 1994 Qazvin protests, the 1999 Iranian student protests, the 2009 Iranian presidential election protests, when some protesters chanted "death to the dictator", and ripped down pictures of Khamenei, as well as the 2011–2012 Iranian protests and 2017–2018 Iranian protests, among others. In 2016, Khamenei, who outlined the elections guidelines "in line with Article 110 of Iran's Constitution", asked to maximise the amount of transparency in elections in Iran, using modern technologies. During the Mahshahr massacre, protests expanded against "government corruption, failing institutions, lack of freedoms and the repressive rule of Iran's supreme leader, Ayatollah Ali Khamenei". Journalists, bloggers, and others have been imprisoned in Iran for insulting Khamenei, often in conjunction with blasphemy charges. During the 2018–2019 Iranian general strikes and protests, Khamenei demanded punishment for those "who disrupt economic security". According to Reuters, the remarks were "clearly intended to send a message to Iranians who may plan more demonstrations". During the 2019–2020 Iranian protests, Khamenei met with various officials and cabinet members, saying he would "hold the assembled officials responsible for the consequences of the protests if they didn't immediately stop them". According to an official, Khamenei "made clear the demonstrations required a forceful response" and that "rioters should be crushed". Some sentences have included lashing and jail time; some have died in custody. During the Ukraine International Airlines Flight 752 protests, thousands of protesters demanded Khamenei's resignation. The Baháʼí Faith is the largest religious minority in Iran, with around 300,000 members (8,000,000 members worldwide) and is officially considered a dangerous cult by the Iranian government. It is banned in Iran and several other countries. Khamenei has approved new legislation against Baháʼís in Iran and lessen their influence abroad. According to a letter from the Chairman of the Command Headquarters of the Armed Forces in Iran addressed to the Ministry of Information, the Revolutionary Guard, and the Police Force, Khamenei has also ordered the Command Headquarters to identify people who adhere to the Baháʼí Faith and to monitor their activities and gather any and all information about the members of the Baháʼí Faith. In 2000, he was listed by the Committee to Protect Journalists as "one of the top ten enemies of the press and freedom of expression", and was named to the Time 100 in 2007. Opposition journalists Ahmad Zeidabadi, Mohsen Sazegara, Mohammad Nourizad and Akbar Ganji were arrested and investigated for spreading critical articles containing unproven charges against Khamenei's policies as the leader and some organizations. According to Iran's Press Law "spreading rumors and lies and distorts the words of others" is not allowed. Also, according to the law, "spreading libel against officials, institutions, organizations and individuals in the country or insulting legal or real persons who are lawfully respected, even by means of pictures or caricatures" is not allowed. In 2000, Ali Khamenei sent a letter to the Iranian parliament forbidding the legislature from debating a revision of the Iranian press law to allow more freedom. (The law had been used "to close more than 20 independent newspapers" from 1997 to 2000.) He wrote: "The present press law has prevented this big plague. The draft bill is not legitimate and in the interests of the system and the revolution." This was called a use of "extra-legislative power" by reformists and opposition groups, but Speaker of Parliament Mehdi Karroubi reminded deputies that "the constitution contained "elements of the absolute rule of the supreme clerical leader"." Kayhan and Jomhuri-ye Eslami are two newspapers published under the management of Khamenei. Among his controversial actions were his rejection of a bill presented by the Iranian parliament in 2000 that aimed to reform the country's press law, and the disqualification of thousands of parliamentary candidates for the 2004 Iranian legislative election by the Guardian Council he appointed. In 2012, 2013, and 2014, Forbes selected Khamenei as the 21st, 23rd, and 19th most powerful person in the world, respectively, in their list of The World's Most Powerful People. Several journalists, bloggers, and other individuals were put on trial in Iran for insulting the Supreme Leader, often in conjunction with blasphemy charges. In 1996, Abbas Maroufi was sentenced to 35 lashes and six months imprisonment for spreading lies and insulting Khamenei. Maroufi was also banned from working as a journalist and his literary monthly Gardoon was closed. Maroufi had compared Khamenei to former Shah of Iran Mohammed Reza Pahlavi. In 2005, an Iranian was jailed for two years for insulting Khamenei and Imam Khomeini while being cleared of insulting the prophet. In 2009, Iranian blogger Omid Reza Mir Sayafi, who was arrested for insulting Khamenei in an internet post, died while in custody in Evin Prison. In 2010, opposition activist Ahmad Gabel was sentenced to 20 months in jail for insulting Khamenei, as well as 3 additional years for possessing a satellite receiver, a 3-year exile and a fine. In 2014, eight men, including a Briton, were sentenced to 19 to 20 years for insulting Khamenei and other charges relating to Facebook comments. In 2017, Sina Dehghan was sentenced to death for insulting the prophet, with an additional 16-month sentence for insulting Khamenei in a messaging application. In July 2007, Khamenei criticized Iranian women's rights activists and the Convention on the Elimination of All Forms of Discrimination Against Women (CEDAW). He said: "In our country ... some activist women, and some men, have been trying to play with Islamic rules to match international conventions related to women. This is wrong." Khamenei made these comments two days after Iranian women's rights activist Delaram Ali was sentenced to 34 months of jail and ten lashes by Iran's judiciary. Khamenei believes in gender segregation. Khamenei also believes that gender equality is a Zionist plot with the purpose to "corrupt the role of women in society". Khamenei advocates the Islamic practice of hijab, believing that hijab is aimed at honoring women. To the Western objections regarding compulsory hijab in Iran, he responds by pointing out the compulsory unveiling in certain Western countries and obstacles created for veiled Muslim women who want to enter universities. He further argues that women in the West have lost their honor by pointing out a perceived high rate of sexual violence in the West as well as the widespread exploitation of female sexual appeal for commercial purposes. Khamenei believes homosexuality is a "moral deprivation" present in the West, but supports Khomeini's 1985 fatwa permitting sex reassignment surgery for gender dysphoria. Personal life Khamenei is married to Mansoureh Khojasteh Bagherzadeh, with whom he has six children; four sons (Mostafa, Mojtaba, Masoud, and Meysam) and two daughters (Boshra and Hoda). One of his sons, Mojtaba, married a daughter of Gholam-Ali Haddad-Adel. His eldest son, Mostafa, is married to a daughter of Azizollah Khoshvaght. Another son, Masoud, is married to the daughter of Mohsen Kharazi. He has three brothers, including Mohammad Khamenei and Hadi Khamenei. One of his four sisters, Badri Khamenei (wife of dissident Ali Tehrani), fled into exile in the 1980s. As Supreme Leader, Khamenei moved to a house in Central Tehran on Palestine Street. A compound grew around it that now contains around fifty buildings. Around 500 people are employed at this "Beit Rahbari compound" according to The Telegraph, and "many recruited from the military and security services". According to Mehdi Khalaji, an Iran expert at the Washington Institute for Near East Policy, Khamenei has a decent life "without it being luxurious". Robert Tait of The Daily Telegraph commented that Khamenei is "renowned for a spartan lifestyle". Dexter Filkins describes Khamenei as presenting himself "as an ascetic, dressing and eating simply". In an interview with a women's magazine, his wife declared that "we do not have decorations, in the usual sense. Years ago, we freed ourselves from these things". On the other hand, Mother Nature Network reported that Khamenei has been seen riding around in a BMW car and published a picture of him exiting one. Khamenei, often seen as stern, enjoys poetry, gardening, and once smoked a pipe — unusual for a cleric. Despite his absolute power, he leads a modest life, rarely leaving Iran, and has been pictured happily tending his garden with a simple plastic watering can. Khamenei's health has been called into question. In January 2007, rumors spread of his illness or death after he had not been seen in public for some weeks and had not appeared as he traditionally does at celebrations for Eid al-Adha. Khamenei issued a statement declaring that "enemies of the Islamic system fabricated various rumors about death and health to demoralize the Iranian nation", but according to the author Hooman Majd, he appeared to be "visibly weak" in photos released with the statement. On 9 September 2014, Khamenei underwent prostate surgery in what his doctors described in state news media as a "routine operation". According to a report by Le Figaro, Western intelligence sources said in 2015 that Khamenei had prostate cancer with two years left to live. In September 2022, it was reported that Khamenei had undergone surgery for bowel obstruction and had to cancel a number of meetings. Literature and art In 1988, while serving as President of Iran, Khamenei delivered a speech titled "The Splendor of the Persian Language and the Need to Protect It." In this address, he described language as a fundamental and defining element of cultural identity across nations and characterized Persian as "the language of true revolutionary Islam." He also drew a comparison between Persian and Arabic, arguing for the expressive richness of Persian and questioning the extent to which the poetry of Hafez, the fourteenth-century poet, could be adequately translated into Arabic. In Mashhad, he used to participate in literary associations along with known poets and used to critique poems; he has himself written some poetry under the pseudonym "Amin". Khamenei has supported revising Persian by replacing loanwords with newly coined terms, including rayansphere for cyberspace, radian for radio, and televisan for television. Khamenei has stated that "poetry must be the vanguard of the caravan of the [Islamic] revolution... [T]hrough the arts and literature, the revolution can be exported more easily and honestly." It has been suggested (by Dexter Filkins) that this might explain his interest in banning books, prohibiting newspapers and imprisoning artists. He has expressed interest in studying novels and stories since childhood and studied various novels of the world. He was "fascinated by Jean-Paul Sartre and Bertrand Russell" in his youth. He praised the works of Mikhail Sholokhov, Aleksey N. Tolstoy, Honoré de Balzac, and Michel Zévaco. He said that Victor Hugo's Les Misérables "is the best novel that has been written in history". He explained: I've read The Divine Comedy. I have read Amir Arsalan. I have also read A Thousand and One Nights ... [But] Les Misérables is a miracle in the novel writing world... I have repeatedly said, go read Les Misérables once. This Les Misérables is a book of sociology, a book of history, a book of criticism, divine book, a book of love and feeling. Khamenei suggested reading The Grapes of Wrath to "an audience of writers and artists" and Uncle Tom's Cabin to the high-level state managers as he thought it shed light on the history of the United States: Isn't this the government that massacred the original native inhabitants of the land of America? That wiped out the American Indians? ... Today, one of the most tragic works of art is Uncle Tom's Cabin ... This book still lives after almost 200 years. Khamenei is fluent in Arabic in addition to his native languages, Persian and Azerbaijani. He has translated several books into Persian from Arabic, including the works of the Egyptian political theorist Sayyid Qutb. In late 1996, following a fatwa by Khamenei stating that music education corrupts the minds of young children and is against Islam, many music schools were closed and music instruction to children under the age of 16 was banned by public establishments (although private instruction continued). However, he is also known to have a good singing voice and plays the tar, a traditional Iranian stringed instrument. Public diplomacy In February 2011, Ali Khamenei supported the Egyptian uprising against their government, describing it as Islamic awakening instead of Arab Spring. Trying to communicate with the Arab people, he addressed Egypt's protesters in Arabic even though his native language is Persian. He introduced himself as "your brother in religion", while praising the "explosion of sacred anger". Later in "Islamic Awakening" conferences held in Tehran, Khamenei praised the Muslim youths of Tunisia, Libya, Egypt, Yemen and Bahrain for what he described as Islamic awakening. He also paralleled these events with the Islamic revolution in Iran during his Nowruz oration in 2011. Major protests against the Iranian regime also broke out throughout Iran in 2011, and they became known as the 2011–2012 Iranian protests. Khamenei wrote an open letter to American students in 2024, which garnered a harsh US reaction. In the letter he described US students protesting against Israel as a new branch of the Axis of Resistance, and called on American students to familiarize themselves with the Quran. Works Translations from Arabic: Collections: See also Notes References Bibliography External links |
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