Noam Chomsky

In addition to his work in linguistics, since the 1960s, Chomsky has been an influential voice on the American Left as a consistent critic of the foreign policy of the United States, contemporary capitalism, and corporatocracy. Born to immigrant Ashkenazi Jews in Philadelphia, Chomsky developed an early interest in anarchism from alternative bookstores in New York City. He studied at the University of Pennsylvania. During his postgraduate work in the Harvard Society of Fellows, Chomsky developed the theory of transformational grammar for which he earned his doctorate in 1955. That year he began teaching at MIT, and in 1957 emerged as a significant figure in linguistics with his landmark work Syntactic Structures, which played a major role in remodeling the study of language. From 1958 to 1959 Chomsky was a National Science Foundation fellow at the Institute for Advanced Study. He created or co-created the universal grammar theory, the generative grammar theory, the Chomsky hierarchy, and the minimalist program. Chomsky also played a pivotal role in the decline of linguistic behaviorism, and was particularly critical of the work of B. An outspoken opponent of U.S. involvement in the Vietnam War, which he saw as an act of American imperialism, in 1967 Chomsky rose to national attention for his anti-war essay "The Responsibility of Intellectuals". Becoming associated with the New Left, he was arrested multiple times for his activism and placed on President Richard Nixon's list of political opponents. In collaboration with Edward S. Herman, Chomsky later articulated the propaganda model of media criticism in Manufacturing Consent, and worked to expose the Indonesian occupation of East Timor. His defense of unconditional freedom of speech, including that of Holocaust denial, generated significant controversy in the Faurisson affair of the 1980s. Chomsky's commentary on the Cambodian genocide and the Bosnian genocide also generated controversy. Since retiring from active teaching at MIT, he has continued his vocal political activism, including opposing the 2003 invasion of Iraq and supporting the Occupy movement. An anti-Zionist, Chomsky considers Israel's treatment of Palestinians to be worse than South African–style apartheid, and criticizes U.S. support for Israel. Chomsky is widely recognized as having helped to spark the cognitive revolution in the human sciences, contributing to the development of a new cognitivistic framework for the study of language and the mind. Chomsky remains a leading critic of U.S. foreign policy, contemporary capitalism, U.S. involvement and Israel's role in the Israeli–Palestinian conflict, and mass media. Chomsky and his ideas remain highly influential in the anti-capitalist and anti-imperialist movements.

Chomsky was born on December 7, 1928, in East Oak Lane, Philadelphia, Pennsylvania. His parents, William Chomsky and Elsie Simonofsky, were Ashkenazi Jewish immigrants. In 1913, William fled the Russian Empire, from what is now Ukraine, to escape conscription, and worked in Baltimore sweatshops and Hebrew elementary schools before attending college. Elsie emigrated from the region of what is present-day Belarus. Both parents' first language was Yiddish although it was taboo to speak it at home; his father spoke English with a foreign accent while his mother spoke a native New York City English dialect. After moving to Philadelphia, William became principal of the Congregation Mikveh Israel religious school and joined the Gratz College faculty. He placed great emphasis on educating people so that they would be "well integrated, free and independent in their thinking, concerned about improving and enhancing the world, and eager to participate in making life more meaningful and worthwhile for all", a mission that shaped and was subsequently adopted by his son. Elsie, who also taught at Mikveh Israel, shared her leftist politics and care for social issues with her sons. Chomsky's only sibling, David Eli Chomsky (1934-2021), worked as a cardiologist in Philadelphia. The brothers were close, though David was more easygoing while Noam could be very competitive. They were raised Jewish, learned Hebrew, and were regularly involved in discussing political theories of Zionism; the family was particularly influenced by the Left Zionist writings of Ahad Ha'am. The brothers faced antisemitism as children, particularly from Philadelphia's Irish and German communities. Chomsky attended the independent, Deweyite Oak Lane Country Day School and Philadelphia's Central High School, where he excelled academically and joined various clubs and societies, but was troubled by the school's hierarchical and domineering teaching methods. He also attended Hebrew High School at Gratz College, where his father taught. Chomsky has described his parents as "normal Roosevelt Democrats" with center-left politics, but relatives involved in the International Ladies' Garment Workers' Union exposed him to socialism and far-left politics. He was substantially influenced by his uncle and the Jewish leftists who frequented his New York City newspaper stand to debate current affairs. Chomsky himself often visited left-wing and anarchist bookstores when visiting his uncle in the city, voraciously reading political literature. He became absorbed in the story of the 1939 fall of Barcelona and suppression of the Spanish anarchosyndicalist movement, writing his first article on the topic at the age of 10. That he came to identify with anarchism first rather than another leftist movement, he described as a "lucky accident". Chomsky was firmly anti-Bolshevik by his early teens.

In 1945, at the age of 16, Chomsky began a general program of study at the University of Pennsylvania, where he explored philosophy, logic, and languages and developed a primary interest in learning Arabic. Living at home, he funded his undergraduate degree by teaching Hebrew. Frustrated with his experiences at the university, he considered dropping out and moving to a kibbutz in Mandatory Palestine, but his intellectual curiosity was reawakened through conversations with the linguist Zellig Harris, whom he first met in a political circle in 1947. Harris introduced Chomsky to the field of theoretical linguistics and convinced him to major in the subject. Chomsky's BA honors thesis, "Morphophonemics of Modern Hebrew", applied Harris's methods to the language. Chomsky revised this thesis for his MA, which he received from the University of Pennsylvania in 1951; it was subsequently published as a book. He also developed his interest in philosophy while at university, in particular under the tutelage of Nelson Goodman. From 1951 to 1955, Chomsky was a member of the Society of Fellows at Harvard University, where he undertook research on what became his doctoral dissertation. Having been encouraged by Goodman to apply, Chomsky was attracted to Harvard in part because the philosopher Willard Van Orman Quine was based there. Both Quine and a visiting philosopher, J. L. Austin of the University of Oxford, strongly influenced Chomsky. In 1952, Chomsky published his first academic article in The Journal of Symbolic Logic. Highly critical of the established behaviorist currents in linguistics, in 1954, he presented his ideas at lectures at the University of Chicago and Yale University. He had not been registered as a student at Pennsylvania for four years, but in 1955 he submitted a thesis setting out his ideas on transformational grammar; he was awarded a Doctor of Philosophy degree for it, and it was privately distributed among specialists on microfilm before being published in 1975 as part of The Logical Structure of Linguistic Theory. Harvard professor George Armitage Miller was impressed by Chomsky's thesis and collaborated with him on several technical papers in mathematical linguistics. Chomsky's doctorate exempted him from compulsory military service, which was otherwise due to begin in 1955. In 1947, Chomsky began a romantic relationship with Carol Doris Schatz, whom he had known since early childhood. They married in 1949. After Chomsky was made a Fellow at Harvard, the couple moved to the Allston area of Boston and remained there until 1965, when they relocated to the suburb of Lexington. The couple took a Harvard travel grant to Europe in 1953. He enjoyed living in Hashomer Hatzair's HaZore'a kibbutz while in Israel, but was appalled by his interactions with Jewish nationalism, anti-Arab racism and, within the kibbutz's leftist community, Stalinism. On visits to New York City, Chomsky continued to frequent the office of the Yiddish anarchist journal Fraye Arbeter Shtime and became enamored with the ideas of Rudolf Rocker, a contributor whose work introduced Chomsky to the link between anarchism and classical liberalism. Chomsky also read other political thinkers: the anarchists Mikhail Bakunin and Diego Abad de Santillán, democratic socialists George Orwell, Bertrand Russell, and Dwight Macdonald, and works by Marxists Karl Liebknecht, Karl Korsch, and Rosa Luxemburg. His politics were reaffirmed by Orwell's depiction of Barcelona's functioning anarchist society in Homage to Catalonia (1938). Chomsky read the leftist journal Politics, which furthered his interest in anarchism, and the council communist periodical Living Marxism, though he rejected the Marxist orthodoxy of its editor, Paul Mattick.

Chomsky befriended two linguists at the Massachusetts Institute of Technology (MIT)—Morris Halle and Roman Jakobson—the latter of whom secured him an assistant professor position there in 1955. At MIT, Chomsky spent half his time on a mechanical translation project and half teaching a course on linguistics and philosophy. He described MIT as open to experimentation where he was free to pursue his idiosyncratic interests. MIT promoted him to the position of associate professor in 1957, and over the next year he was also a visiting professor at Columbia University. The Chomskys had their first child, Aviva, that same year. He also published his first book on linguistics, Syntactic Structures, a work that radically opposed the dominant Harris–Bloomfield trend in the field. Responses to Chomsky's ideas ranged from indifference to hostility, and his work proved divisive and caused "significant upheaval" in the discipline. The linguist John Lyons later asserted that Syntactic Structures "revolutionized the scientific study of language". From 1958 to 1959 Chomsky was a National Science Foundation fellow at the Institute for Advanced Study in Princeton, New Jersey. Chomsky's provocative critique of B. F. Skinner, who viewed language as entirely learned behavior, and that critique's challenge to the dominant behaviorist paradigm thrust Chomsky into the limelight. Chomsky argued that behaviorism underplayed the role of human creativity in learning language and overplayed the role of external conditions in influencing verbal behavior. He proceeded to found MIT's graduate program in linguistics with Halle. In 1961, Chomsky received tenure and became a full professor in the Department of Modern Languages and Linguistics. He was appointed plenary speaker at the Ninth International Congress of Linguists, held in 1962 in Cambridge, Massachusetts, which established him as the de facto spokesperson of American linguistics. Between 1963 and 1965 he consulted on a military-sponsored project to teach computers to understand natural English commands from military generals. Chomsky continued to publish his linguistic ideas throughout the decade, including in Aspects of the Theory of Syntax (1965), Topics in the Theory of Generative Grammar (1966), and Cartesian Linguistics: A Chapter in the History of Rationalist Thought (1966). Along with Halle, he also edited the Studies in Language series of books for Harper and Row. As he began to accrue significant academic recognition and honors for his work, Chomsky lectured at the University of California, Berkeley, in 1966. These lectures were published as Language and Mind in 1968. In the late 1960s, a high-profile intellectual rift later known as the linguistic wars developed between Chomsky and some of his colleagues and doctoral students—including Paul Postal, John Ross, George Lakoff, and James D. McCawley—who contended that Chomsky's syntax-based, interpretivist linguistics did not properly account for semantic context (general semantics). A post hoc assessment of this period concluded that the opposing programs ultimately were complementary, each informing the other.

Chomsky joined protests against U.S. involvement in the Vietnam War in 1962, speaking on the subject at small gatherings in churches and homes. His 1967 critique of U.S. involvement, "The Responsibility of Intellectuals", among other contributions to The New York Review of Books, debuted Chomsky as a public dissident. This essay and other political articles were collected and published in 1969 as part of Chomsky's first political book, American Power and the New Mandarins. He followed this with further political books, including At War with Asia (1970), The Backroom Boys (1973), For Reasons of State (1973), and Peace in the Middle East? (1974), published by Pantheon Books. These publications led to Chomsky's association with the American New Left movement, though he thought little of prominent New Left intellectuals Herbert Marcuse and Erich Fromm and preferred the company of activists to that of intellectuals. Chomsky remained largely ignored by the mainstream press throughout this period. Chomsky also became involved in left-wing activism. Chomsky refused to pay half his taxes, publicly supported students who refused the draft, and was arrested while participating in an anti-war teach-in outside the Pentagon. During this time, Chomsky co-founded the anti-war collective RESIST with Hans Koning, Mitchell Goodman, Denise Levertov, William Sloane Coffin, and Dwight Macdonald. Although he questioned the objectives of the 1968 student protests, Chomsky regularly gave lectures to student activist groups and, with his colleague Louis Kampf, ran undergraduate courses on politics at MIT independently of the conservative-dominated political science department. When student activists campaigned to stop weapons and counterinsurgency research at MIT, Chomsky was sympathetic but felt that the research should remain under MIT's oversight and limited to systems of deterrence and defense. Chomsky has acknowledged that his MIT lab's funding at this time came from the military. He later said he considered resigning from MIT during the Vietnam War. There has since been a wide-ranging debate about what effects Chomsky's employment at MIT had on his political and linguistic ideas. Chomsky's anti-war activism led to his arrest on multiple occasions and he was on President Richard Nixon's master list of political opponents. Chomsky was aware of the potential repercussions of his civil disobedience, and his wife began studying for her own doctorate in linguistics to support the family in the event of Chomsky's imprisonment or joblessness. Chomsky's scientific reputation insulated him from administrative action based on his beliefs. In 1970 he visited southeast Asia to lecture at Vietnam's Hanoi University of Science and Technology and toured war refugee camps in Laos. In 1973 he helped lead a committee commemorating the 50th anniversary of the War Resisters League. Chomsky's work in linguistics continued to gain international recognition as he received multiple honorary doctorates. He delivered public lectures at the University of Cambridge, Columbia University (Woodbridge Lectures), and Stanford University. His appearance in a 1971 debate with French continental philosopher Michel Foucault positioned Chomsky as a symbolic figurehead of analytic philosophy. He continued to publish extensively on linguistics, producing Studies on Semantics in Generative Grammar (1972), an enlarged edition of Language and Mind (1972), and Reflections on Language (1975). In 1974 Chomsky became a corresponding fellow of the British Academy.

In the late 1970s and 1980s, Chomsky's linguistic publications expanded and clarified his earlier work, addressing his critics and updating his grammatical theory. His political talks often generated considerable controversy, particularly when he criticized the Israeli government and military. In the early 1970s Chomsky began collaborating with Edward S. Herman, who had also published critiques of the U.S. war in Vietnam. Together they wrote Counter-Revolutionary Violence: Bloodbaths in Fact & Propaganda, a book that criticized U.S. military involvement in Southeast Asia and the mainstream media's failure to cover it. Warner Modular published it in 1973, but its parent company disapproved of the book's contents and ordered all copies destroyed. While mainstream publishing options proved elusive, Chomsky found support from Michael Albert's South End Press, an activist-oriented publishing company. In 1979, South End published Chomsky and Herman's revised Counter-Revolutionary Violence as the two-volume The Political Economy of Human Rights, which compares U.S. media reactions to the Cambodian genocide and the Indonesian occupation of East Timor. It argues that because Indonesia was a U.S. ally, U.S. media ignored the East Timorese situation while focusing on events in Cambodia, a U.S. enemy. Chomsky's response included two testimonials before the United Nations' Special Committee on Decolonization, successful encouragement for American media to cover the occupation, and meetings with refugees in Lisbon. Marxist academic Steven Lukes most prominently publicly accused Chomsky of betraying his anarchist ideals and acting as an apologist for Cambodian leader Pol Pot. Herman said that the controversy "imposed a serious personal cost" on Chomsky, who considered the personal criticism less important than the evidence that "mainstream intelligentsia suppressed or justified the crimes of their own states". Chomsky had long publicly criticized Nazism, and totalitarianism more generally, but his commitment to freedom of speech led him to defend the right of French historian Robert Faurisson to advocate a position widely characterized as Holocaust denial. Without Chomsky's knowledge, his plea for Faurisson's freedom of speech was published as the preface to the latter's 1980 book Mémoire en défense contre ceux qui m'accusent de falsifier l'histoire. Chomsky was widely condemned for defending Faurisson, and France's mainstream press accused Chomsky of being a Holocaust denier himself, refusing to publish his rebuttals to their accusations. Critiquing Chomsky's position, sociologist Werner Cohn later published an analysis of the affair titled Partners in Hate: Noam Chomsky and the Holocaust Deniers. The Faurisson affair had a lasting, damaging effect on Chomsky's career, especially in France.

In 1985, during the Nicaraguan Contra War—in which the U.S. supported the contra militia against the Sandinista government—Chomsky traveled to Managua to meet with workers' organizations and refugees of the conflict, giving public lectures on politics and linguistics. Many of these lectures were published in 1987 as On Power and Ideology: The Managua Lectures. In 1983 he published The Fateful Triangle, which argued that the U.S. had continually used the Israeli–Palestinian conflict for its own ends. In 1988, Chomsky visited the Palestinian territories to witness the impact of Israeli occupation. Chomsky and Herman's Manufacturing Consent: The Political Economy of the Mass Media (1988) outlines their propaganda model for understanding mainstream media. Even in countries without official censorship, they argued, the news is censored through five filters that greatly influence both what and how news is presented. The book received a 1992 film adaptation. In 1989, Chomsky published Necessary Illusions: Thought Control in Democratic Societies, in which he suggests that a worthwhile democracy requires that its citizens undertake intellectual self-defense against the media and elite intellectual culture that seeks to control them. By the 1980s, Chomsky's students had become prominent linguists who, in turn, expanded and revised his linguistic theories. In the 1990s, Chomsky embraced political activism to a greater degree than before. Retaining his commitment to the cause of East Timorese independence, in 1995 he visited Australia to talk on the issue at the behest of the East Timorese Relief Association and the National Council for East Timorese Resistance. The lectures he gave on the subject were published as Powers and Prospects in 1996. As a result of the international publicity Chomsky generated, his biographer Wolfgang Sperlich opined that he did more to aid the cause of East Timorese independence than anyone but the investigative journalist John Pilger. After East Timor attained independence from Indonesia in 1999, the Australian-led International Force for East Timor arrived as a peacekeeping force; Chomsky was critical of this, believing it was designed to secure Australian access to East Timor's oil and gas reserves under the Timor Gap Treaty. Chomsky was widely interviewed after the September 11 attacks in 2001 as the American public attempted to make sense of the attacks. He argued that the ensuing war on terror was not a new development but a continuation of U.S. foreign policy and concomitant rhetoric since at least the Reagan era. He gave the D.T. Lakdawala Memorial Lecture in New Delhi in 2001, and in 2003 visited Cuba at the invitation of the Latin American Association of Social Scientists. Chomsky's 2003 Hegemony or Survival articulated what he called the United States' "imperial grand strategy" and critiqued the Iraq War and other aspects of the war on terror. Chomsky toured internationally with greater regularity during this period.

Chomsky retired from MIT in 2002, but continued to conduct research and seminars on campus as an emeritus. That same year he visited Turkey to attend the trial of a publisher who had been accused of treason for printing one of Chomsky's books; Chomsky insisted on being a co-defendant and amid international media attention, the Security Courts dropped the charge on the first day. During that trip Chomsky visited Kurdish areas of Turkey and spoke out in favor of the Kurds' human rights. A supporter of the World Social Forum, he attended its conferences in Brazil in both 2002 and 2003, also attending the Forum event in India. Chomsky supported the 2011 Occupy movement, speaking at encampments and publishing on the movement, which he called a reaction to a 30-year class war. The 2015 documentary Requiem for the American Dream summarizes his views on capitalism and economic inequality through a "75-minute teach-in". In 2015, Chomsky and his wife purchased a residence in São Paulo, Brazil, and began splitting their time between Brazil and the U.S. Chomsky taught a short-term politics course at the University of Arizona in 2017. He was later hired as the Agnese Nelms Haury Chair in the Agnese Nelms Haury Program in Environment and Social Justice, a part-time professorship in the linguistics department with duties including teaching and public seminars. His salary was covered by philanthropic donations. After a stroke in June 2023, Chomsky moved to Brazil full-time.

Since the 1960s, Chomsky has maintained that syntactic knowledge is partially inborn, implying that children need only learn certain language-specific features of their native languages. He bases his argument on observations about human language acquisition and describes a "poverty of the stimulus": an enormous gap between the linguistic stimuli to which children are exposed and the rich linguistic competence they attain. For example, although children are exposed to only a very small and finite subset of the allowable syntactic variants within their first language, they somehow acquire the highly organized and systematic ability to understand and produce an infinite number of sentences, including ones that have never before been uttered, in that language. To explain this, Chomsky proposed that the primary linguistic data must be supplemented by an innate linguistic capacity. Furthermore, while a human baby and a kitten are both capable of inductive reasoning, if they are exposed to exactly the same linguistic data, the human will always acquire the ability to understand and produce language, while the kitten will never acquire either ability. Chomsky referred to this difference in capacity as the language acquisition device, and suggested that linguists needed to determine both what that device is and what constraints it imposes on the range of possible human languages. The universal features that result from these constraints would constitute "universal grammar". Multiple researchers have challenged universal grammar on the grounds of the evolutionary infeasibility of its genetic basis for language, the lack of crosslinguistic surface universals, and the unproven link between innate/universal structures and the structures of specific languages. Michael Tomasello has challenged Chomsky's theory of innate syntactic knowledge as based on theory and not behavioral observation. The empirical basis of poverty of the stimulus arguments has been challenged by Geoffrey Pullum and others, leading to back-and-forth debate in the language acquisition literature. Recent work has also suggested that some recurrent neural network architectures can learn hierarchical structure without an explicit constraint.

Chomsky is generally credited with launching the research tradition of generative grammar, which aims to explain the cognitive basis of language by formulating and testing explicit models of humans' subconscious grammatical knowledge. Generative grammar proposes models of language consisting of explicit rule systems, which make testable falsifiable predictions. The goal of generative grammar is sometimes described as answering the question "What is that that you know when you know a language?" Within generative grammar, Chomsky's initial model was called transformational grammar. Chomsky developed transformational grammar in the mid-1950s, whereupon it became the dominant syntactic theory in linguistics for two decades. "Transformations" are syntactic rules that derive surface structure from deep structure, which was often considered to reflect the structure of meaning. Transformational grammar later developed into the 1980s government and binding theory and thence into the minimalist program. This research focused on the principles and parameters framework, which explained children's ability to learn any language by filling open parameters (a set of universal grammar principles) that adapt as the child encounters linguistic data. The minimalist program, initiated by Chomsky, asks which minimal principles and parameters theory fits most elegantly, naturally, and simply. Chomsky is commonly credited with inventing transformational-generative grammar, but his original contribution was considered modest when he first published his theory. In his 1955 dissertation and his 1957 textbook Syntactic Structures, he presented recent developments in the analysis formulated by Zellig Harris, who was Chomsky's PhD supervisor, and by Charles F. Hockett. Their method derives from the work of the structural linguist Louis Hjelmslev, who introduced algorithmic grammar to general linguistics. Based on this rule-based notation of grammars, Chomsky grouped logically possible phrase-structure grammar types into a series of four nested subsets and increasingly complex types, together known as the Chomsky hierarchy. This classification remains relevant to formal language theory and theoretical computer science, especially programming language theory, compiler construction, and automata theory. Chomsky's Syntactic Structures became, beyond generative linguistics as such, a catalyst for connecting what in Hjelmslev's and Jespersen's time was the beginnings of structural linguistics, which has become cognitive linguistics.

Chomsky is a prominent political dissident. His political views have changed little since his childhood, when he was influenced by the emphasis on political activism that was ingrained in Jewish working-class tradition. He usually identifies as an anarcho-syndicalist or a libertarian socialist. He views these positions not as precise political theories but as ideals that he thinks best meet human needs: liberty, community, and freedom of association. Unlike some other socialists, such as Marxists, Chomsky believes that politics lies outside the remit of science, but he still roots his ideas about an ideal society in empirical data and empirically justified theories. In Chomsky's view, the truth about political realities is systematically distorted or suppressed by an elite corporatocracy, which uses corporate media, advertising, and think tanks to promote its own propaganda. His work seeks to reveal such manipulations and the truth they obscure. Chomsky believes this web of falsehood can be broken by "common sense", critical thinking, and understanding the roles of self-interest and self-deception, and that intellectuals abdicate their moral responsibility to tell the truth about the world in fear of losing prestige and funding. He argues that, as such an intellectual, it is his duty to use his social privilege, resources, and training to aid popular democracy movements in their struggles. Although he has participated in direct action demonstrations—joining protests, being arrested, organizing groups—Chomsky's primary political outlet is education, i.e., free public lessons. Chomsky is a longtime member of the Democratic Socialists of America (DSA) and a longtime member of the Industrial Workers of the World (IWW) international union, as was his father.

Chomsky has been a prominent critic of American imperialism, but is not a pacifist, believing World War II was justified as America's last defensive war. He believes that U.S. foreign policy's basic principle is the establishment of "open societies" that are economically and politically controlled by the U.S. and where U.S.-based businesses can prosper. He argues that the U.S. seeks to suppress any movements within these countries that are not compliant with U.S. interests and to ensure that U.S.-friendly governments are placed in power. When discussing current events, he emphasizes their place within a wider historical perspective. He believes that official, sanctioned historical accounts of U.S. and British extraterritorial operations have consistently whitewashed these nations' actions in order to present them as having benevolent motives in either spreading democracy or, in older instances, spreading Christianity; by criticizing these accounts, he seeks to correct them. Prominent examples he regularly cites are the actions of the British Empire in India and Africa and U.S. actions in Vietnam, the Philippines, Latin America, and the Middle East. Chomsky's political work has centered heavily on criticizing the actions of the United States. He has said he focuses on the U.S. because the country has militarily and economically dominated the world during his lifetime and because its liberal democratic electoral system allows the citizenry to influence government policy. His hope is that, by spreading awareness of the impact U.S. foreign policies have on the populations affected by them, he can sway the populations of the U.S. and other countries into opposing the policies. He urges people to criticize their governments' motivations, decisions, and actions, to accept responsibility for their own thoughts and actions, and to apply the same standards to others as to themselves. Chomsky has been critical of U.S. involvement in the Israeli–Palestinian conflict, arguing that it has consistently blocked a peaceful settlement. He also criticizes the U.S.'s close ties with Saudi Arabia and involvement in Saudi Arabian-led intervention in Yemen, highlighting that Saudi Arabia has "one of the most grotesque human rights records in the world". Chomsky called the Russian invasion of Ukraine a criminal act of aggression and noted that Russia was committing major war crimes in the country. He considered support for Ukraine's self-defense legitimate and said Ukraine should be given enough military aid to defend itself, but not enough to cause "an escalation". His criticism of the war focused on the United States. He alleged that the U.S. rejected any compromise with Russia and that this might have provoked the invasion. According to Chomsky, the U.S. was arming Ukraine only to weaken Russia, and Ukrainian requests for heavy weaponry were untrue "Western propaganda", despite Ukraine's President Volodymyr Zelenskyy repeatedly asking for them. More than a year into the invasion, Chomsky argued that Russia was waging the war "more humanely" than the U.S. did the invasion of Iraq.

In his youth, Chomsky developed a dislike of capitalism and the pursuit of material wealth. At the same time, he developed a disdain for authoritarian socialism, as represented by the Marxist–Leninist policies of the Soviet Union. Rather than accepting the common view among U.S. economists that a spectrum exists between total state ownership of the economy and total private ownership, he instead suggests that a spectrum should be understood between total democratic control of the economy and total autocratic control (whether state or private). He argues that Western capitalist countries are not really democratic, because, in his view, a truly democratic society is one in which all persons have a say in public economic policy. He has stated his opposition to ruling elites, among them institutions like the IMF, World Bank, and GATT (precursor to the WTO). Chomsky highlights that, since the 1970s, the U.S. has become increasingly economically unequal as a result of the repeal of various financial regulations and the unilateral rescinding of the Bretton Woods financial control agreement by the U.S. He characterizes the U.S. as a de facto one-party state, viewing both the Republican Party and Democratic Party as manifestations of a single "Business Party" controlled by corporate and financial interests. Chomsky highlights that, within Western capitalist liberal democracies, at least 80% of the population has no control over economic decisions, which are instead in the hands of a management class and ultimately controlled by a small, wealthy elite. Noting the entrenchment of such an economic system, Chomsky believes that change is possible through the organized cooperation of large numbers of people who understand the problem and know how they want to reorganize the economy more equitably. Acknowledging that corporate domination of media and government stifles any significant change to this system, he sees reason for optimism in historical examples such as the social rejection of slavery as immoral, the advances in women's rights, and the forcing of government to justify invasions. He views violent revolution to overthrow a government as a last resort to be avoided if possible, citing the example of historical revolutions where the population's welfare has worsened as a result of upheaval. Chomsky sees libertarian socialist and anarcho-syndicalist ideas as the descendants of the classical liberal ideas of the Age of Enlightenment, arguing that his ideological position revolves around "nourishing the libertarian and creative character of the human being". He envisions an anarcho-syndicalist future with direct worker control of the means of production and government by workers' councils, who would select temporary and revocable representatives to meet together at general assemblies. The point of this self-governance is to make each citizen, in Thomas Jefferson's words, "a direct participator in the government of affairs". He believes that there will be no need for political parties. By controlling their productive life, he believes that individuals can gain job satisfaction and a sense of fulfillment and purpose. He argues that unpleasant and unpopular jobs could be fully automated, specially remunerated, or communally shared.

Chomsky has written prolifically about the Israeli–Palestinian conflict, aiming to raise public awareness of it. A labor Zionist who later became what is today considered an anti-Zionist, Chomsky has criticized the Israeli settlements in the Israeli-occupied West Bank, which he likens to a settler colony. He has said that the 1947 United Nations Partition Plan for Palestine was a bad decision, but given the realpolitik of the situation, he has also considered a two-state solution on the condition that the nation-states exist on equal terms. Chomsky has said that characterizing Israel's treatment of the Palestinians as apartheid, similar to the system that existed in South Africa, would be a "gift to Israel", as he has long held that "the Occupied Territories are much worse than South Africa". South Africa depended on its black population for labor, but Chomsky argues the same is not true of Israel, which in his view seeks to make the situation for Palestinians under its occupation unlivable, especially in the West Bank and the Gaza Strip, where "atrocities" take place every day. He also argues that, unlike South Africa, Israel has not sought the international community's approval, but rather relies solely on U.S. support. Chomsky has said that the Israeli-led blockade of the Gaza Strip has turned it into a "concentration camp" and expressed fears similar to Israeli intellectual Yeshayahu Leibowitz's 1990s warning that the continued occupation of the Palestinian territories could turn Israeli Jews into "Judeo-Nazis". Chomsky has said that Leibowitz's warning "was a direct reflection of the continued occupation, the humiliation of people, the degradation, and the terrorist attacks by the Israeli government". He has also called the U.S. a violent state that exports violence by supporting Israeli "atrocities" against the Palestinians and said that listening to American mainstream media, including CBS, is like listening to "Israeli propaganda agencies". Chomsky was denied entry to the West Bank in 2010 because of his criticisms of Israel. He had been invited to deliver a lecture at Bir Zeit University and was to meet with Palestinian Prime Minister Salam Fayyad. An Israeli Foreign Ministry spokesman later said that Chomsky was denied entry by mistake. In his 1983 book The Fateful Triangle, Chomsky criticized the Palestine Liberation Organization for its "self-destructiveness" and "suicidal character" and disapproved of its programs of "armed struggle" and "erratic violence". He also criticized the Arab governments as not "decent". Given what he has described as his very Jewish upbringing with deeply Zionist activist parents, Chomsky's views have drawn controversy and criticism. They are rooted in the kibbutzim and socialist binational cooperation. In a 2014 interview on Democracy Now!, Chomsky said that the charter of Hamas, which calls for Israel's destruction, "means practically nothing", having been created "by a small group of people under siege, under attack in 1988". He compared it to the electoral program of the Likud party, which, he said, "states explicitly that there can never be a Palestinian state west of the Jordan River. And they not only state it in their charter, that's a call for the destruction of Palestine, explicit call for it".

Chomsky's political writings have largely focused on ideology, social and political power, mass media, and state policy. One of his best-known works, Manufacturing Consent, dissects the media's role in reinforcing and acquiescing to state policies across the political spectrum while marginalizing contrary perspectives. Chomsky asserts that this version of censorship, by government-guided "free market" forces, is subtler and harder to undermine than was the equivalent propaganda system in the Soviet Union. As he argues, the mainstream press is corporate-owned and thus reflects corporate priorities and interests. Acknowledging that many American journalists are dedicated and well-meaning, he argues that the mass media's choices of topics and issues, the unquestioned premises on which that coverage rests, and the range of opinions expressed are all constrained to reinforce the state's ideology: although mass media will criticize individual politicians and political parties, it will not undermine the wider state-corporate nexus of which it is a part. As evidence, he highlights that the U.S. mass media does not employ any socialist journalists or political commentators. He also points to examples of important news stories that the U.S. mainstream media has ignored because reporting on them would reflect badly upon the country, including the murder of Black Panther Fred Hampton with possible FBI involvement, the massacres in Nicaragua perpetrated by U.S.-funded Contras, and the constant reporting on Israeli deaths without equivalent coverage of the far larger number of Palestinian deaths in that conflict. To remedy this situation, Chomsky calls for grassroots democratic control and involvement of the media. Chomsky considers most conspiracy theories fruitless, distracting substitutes for thinking about policy formation in an institutional framework, where individual manipulation is secondary to broader social imperatives. He separates his Propaganda Model from conspiracy in that he is describing institutions following their natural imperatives rather than collusive forces with secret controls. Instead of supporting the educational system as an antidote, he believes that most education is counterproductive. Chomsky describes mass education as a system solely intended to turn farmers from independent producers into unthinking industrial employees.

Chomsky endeavors to separate his family life, linguistic scholarship, and political activism from each other. An intensely private person, he is uninterested in appearances and the fame his work has brought him. McGilvray suggests that Chomsky is not motivated by a desire for fame but impelled to tell what he perceives as the truth and by a desire to aid others in doing so. Chomsky acknowledges that his income affords him a privileged life compared to the majority of the world's population. Nevertheless, he characterizes himself as a "worker", albeit one who uses his intellect as his employable skill. He reads four or five newspapers daily. In the U.S., he subscribes to The Boston Globe, The New York Times, The Wall Street Journal, Financial Times, and The Christian Science Monitor. Chomsky is not religious but has expressed approval of forms of religion such as liberation theology. Chomsky is known to use charged language ("corrupt", "fascist", "fraudulent") when describing established political and academic figures, which can polarize his audience but is in keeping with his belief that much scholarship is self-serving. His colleague Steven Pinker has said that Chomsky "portrays people who disagree with him as stupid or evil, using withering scorn in his rhetoric", and that this contributes to the extreme reactions he receives. Chomsky avoids academic conferences, including left-oriented ones such as the Socialist Scholars Conference, preferring to speak to activist groups or hold university seminars for mass audiences. His approach to academic freedom has led him to support MIT academics whose actions he deplores. In 1969, when he heard that Walt Rostow, a major architect of the Vietnam War, wanted to return to work at MIT, Chomsky threatened "to protest publicly" if Rostow were denied a position there. In 1989, when Pentagon adviser John Deutch applied to be president of MIT, Chomsky supported his candidacy. Later, when Deutch became head of the CIA, The New York Times quoted Chomsky as saying, "He has more honesty and integrity than anyone I've ever met.... If somebody's got to be running the CIA, I'm glad it's him." Chomsky was married to Carol Doris (née Schatz) from 1949 until her death in 2008. They had three children together: Aviva (b. 1957), Diane (b. 1960), and Harry (b. 1967). In 2014, Chomsky married Valeria Wasserman, a translator for the Institute for Advanced Studies at the University of São Paulo. They have owned a home in Wasserman's native country, Brazil, since 2015. Judith Chomsky and Marvin J. Chomsky are Noam's cousins. In 2023, Chomsky suffered a massive stroke and was flown to a hospital in São Paulo, Brazil, to recuperate. He can no longer walk or communicate, making his return to public life improbable. He was discharged in June 2024 to continue his recovery at home. The same month, Chomsky trended on social media amid false reports of his death; periodicals retracted premature obituaries. As of November 2025, Chomsky was reportedly still convalescing in Brazil.

Emails related to the activities of convicted child sex offender Jeffrey Epstein released by the House Oversight Committee in November 2025 revealed that Chomsky befriended him after Epstein's 2008 conviction, advised him on how to deal with media coverage of sex trafficking allegations, and remained in touch with him through 2019. In a letter, he wrote that he considered Epstein a "highly valued friend and regular source of intellectual exchange and stimulation". In December 2025, Congress released a photo of Chomsky with Steve Bannon from Epstein's estate and another showing him flying with Epstein in the latter's private plane. Before the files' release, Chomsky had said he received around $270,000 from an account connected to Epstein while sorting through common funds after his wife Carol's death. In 2016, Epstein invited Chomsky and his wife, Valeria, to meet in either New York or the Caribbean. Chomsky replied: "Valeria's always keen on New York. I'm really fantasizing about the Caribbean island." In 2019, Epstein referenced advice he said Chomsky had given him on handling media scrutiny after his 2008 plea deal: "The best way to proceed is to ignore it... That's particularly true now with the hysteria that has developed about abuse of women, which has reached the point that even questioning a charge is a crime worse than murder." Chomsky consulted Epstein for guidance on drafting an email to his financial advisor about a $187,000 payment that had already been disbursed. He also contacted Bannon using an email address Epstein provided. In 2023, Chomsky told The Wall Street Journal of his relationship with Epstein: "First response is that it is none of your business. Or anyone's. Second is that I knew him and we met occasionally." In 2026, Wasserman wrote that Chomsky's relationship with Epstein was a "grave mistake" and apologized on her husband's behalf, writing, "It was deeply disturbing for both of us to realize we had engaged with someone who presented as a helpful friend but led a hidden life of criminal, inhumane, and perverted acts." The couple's two financial transactions with Epstein were related to retirement income, according to reporting in both The Guardian and The Jerusalem Post.

McGilvray observes that Chomsky inaugurated the "cognitive revolution" in linguistics, and that he is largely responsible for establishing the field as a formal, natural science, moving it away from the procedural form of structural linguistics dominant during the mid-20th century. As such, some have called Chomsky "the father of modern linguistics". Linguist John Lyons further remarked that within a few decades of publication, Chomskyan linguistics had become "the most dynamic and influential" school of thought in the field. By the 1970s his work had also come to exert a considerable influence on philosophy, and a Minnesota State University Moorhead poll ranked Syntactic Structures as the single most important work in cognitive science. In addition, his work in automata theory and the Chomsky hierarchy have become well known in computer science, and he is much cited in computational linguistics. Chomsky's criticisms of behaviorism contributed substantially to the decline of behaviorist psychology; in addition, he is generally regarded as one of the primary founders of the field of cognitive science. Some arguments in evolutionary psychology are derived from his research results; Nim Chimpsky, a chimpanzee who was the subject of a study in animal language acquisition at Columbia University, was named after Chomsky in reference to his view of language acquisition as a uniquely human ability. ACM Turing Award winner Donald Knuth credited Chomsky's work with helping him combine his interests in mathematics, linguistics, and computer science. IBM computer scientist John Backus, another Turing Award winner, used some of Chomsky's concepts to help him develop FORTRAN, the first widely used high-level computer programming language. Chomsky's theory of generative grammar has also influenced work in music theory and analysis, such as Fred Lerdahl's and Ray Jackendoff's generative theory of tonal music. Chomsky is among the most cited authors living or dead. He was cited within the Arts and Humanities Citation Index more often than any other living scholar from 1980 to 1992. Chomsky was also extensively cited in the Social Sciences Citation Index and Science Citation Index during the same period. The librarian who conducted the research said that the statistics show that "he is very widely read across disciplines and that his work is used by researchers across disciplines... it seems that you can't write a paper without citing Noam Chomsky." As a result of his influence, there are dueling camps of Chomskyan and non-Chomskyan linguistics. Their disputes are often acrimonious. Additionally, according to journalist Maya Jaggi, Chomsky is among the most quoted sources in the humanities, ranking alongside Karl Marx, William Shakespeare and the Bible.

Chomsky's status as the "most-quoted living author" is credited to his political writings, which vastly outnumber his writings on linguistics. Chomsky biographer Wolfgang B. Sperlich characterizes him as "one of the most notable contemporary champions of the people"; journalist John Pilger has described him as a "genuine people's hero; an inspiration for struggles all over the world for that basic decency known as freedom. To a lot of people in the margins—activists and movements—he's unfailingly supportive." Arundhati Roy has called him "one of the greatest, most radical public thinkers of our time", and Edward Said thought him "one of the most significant challengers of unjust power and delusions". Fred Halliday has said that by the start of the 21st century Chomsky had become a "guru" for the world's anti-capitalist and anti-imperialist movements. The propaganda model of media criticism that he and Herman developed has been widely accepted in radical media critiques and adopted to some level in mainstream criticism of the media, also exerting a significant influence on the growth of alternative media, including radio, publishers, and the Internet, which in turn have helped to disseminate his work. Despite this broad influence, university departments devoted to history and political science rarely include Chomsky's work on their undergraduate syllabi. Critics have argued that despite publishing widely on social and political issues, Chomsky has no formal expertise in these areas; he has responded that such issues are not as complex as many social scientists claim and that almost everyone is able to comprehend them regardless of whether they have been academically trained to do so. Some have responded to these criticisms by questioning the critics' motives and their understanding of Chomsky's ideas. Sperlich, for instance, says that Chomsky has been vilified by corporate interests, particularly in the mainstream press. Likewise, according to McGilvray, many of Chomsky's critics "do not bother quoting his work or quote out of context, distort, and create straw men that cannot be supported by Chomsky's text". Chomsky drew criticism for not calling the Bosnian War's Srebrenica massacre a "genocide". While he did not deny the fact of the massacre, which he called "a horror story and major crime", he felt the massacre did not meet the definition of genocide. Critics have accused Chomsky of denying the Bosnian genocide. Chomsky's far-reaching criticisms of U.S. foreign policy and the legitimacy of U.S. power have raised controversy. A document obtained pursuant to a Freedom of Information Act (FOIA) request from the U.S. government revealed that the Central Intelligence Agency (CIA) monitored his activities and for years denied doing so. The CIA also destroyed its files on Chomsky at some point, possibly in violation of federal law. He has often received undercover police protection at MIT and when speaking on the Middle East but has refused uniformed police protection. German news magazine Der Spiegel described Chomsky as "the Ayatollah of anti-American hatred", while American conservative commentator David Horowitz called him "the most devious, the most dishonest and... the most treacherous intellect in America", whose work is infused with "anti-American dementia" and evidences his "pathological hatred of his own country". Chomsky's criticism of Israel has led to his being called a traitor to the Jewish people and an antisemite. Criticizing Chomsky's defense of the right of individuals to engage in Holocaust denial on the grounds that freedom of speech must be extended to all viewpoints, Werner Cohn called Chomsky "the most important patron" of the neo-Nazi movement. The Anti-Defamation League (ADL) called him a Holocaust denier, describing him as a "dupe of intellectual pride so overweening that he is incapable of making distinctions between totalitarian and democratic societies, between oppressors and victims". In turn, Chomsky has claimed that the ADL is dominated by "Stalinist types" who oppose democracy in Israel. The lawyer Alan Dershowitz has called Chomsky a "false prophet of the left"; Chomsky called Dershowitz "a complete liar" who is on "a crazed jihad, dedicating much of his life to trying to destroy my reputation". In early 2016, President Recep Tayyip Erdoğan of Turkey publicly rebuked Chomsky after he signed an open letter condemning Erdoğan for his anti-Kurdish repression and double standards on terrorism. Chomsky accused Erdoğan of hypocrisy, noting that Erdoğan supports al-Qaeda's Syrian affiliate, the al-Nusra Front.

The basis of Chomsky's linguistic theory lies in biolinguistics, the linguistic school that holds that the principles underpinning the structure of language are biologically preset in the human mind and hence genetically inherited. He argues that all humans share the same underlying linguistic structure, irrespective of sociocultural differences. In adopting this position Chomsky rejects the radical behaviorist psychology of B. F. Skinner, who viewed speech, thought, and all behavior as a completely learned product of the interactions between organisms and their environments. Accordingly, Chomsky argues that language is a unique evolutionary development of the human species and distinguished from modes of communication used by any other animal species. Chomsky argues that his nativist, internalist view of language is consistent with the philosophical school of "rationalism" and contrasts with the anti-nativist, externalist view of language consistent with the philosophical school of "empiricism", which contends that all knowledge, including language, comes from external stimuli. Historians have disputed Chomsky's claim about rationalism on the basis that his theory of innate grammar excludes propositional knowledge and instead focuses on innate learning capacities or structures.

Chomsky has also been active in a number of philosophical fields, including philosophy of mind, philosophy of language, and philosophy of science. In these fields he is credited with ushering in the "cognitive revolution", a significant paradigm shift that rejected logical positivism, the prevailing philosophical methodology of the time, and reframed how philosophers think about language and the mind. Chomsky views the cognitive revolution as rooted in 17th-century rationalist ideals. His position—the idea that the mind contains inherent structures to understand language, perception, and thought—has more in common with rationalism than behaviorism. He named one of his key works Cartesian Linguistics: A Chapter in the History of Rationalist Thought (1966). This sparked criticism from historians and philosophers who disagreed with Chomsky's interpretations of classical sources and use of philosophical terminology. In the philosophy of language, Chomsky is particularly known for his criticisms of the notion of reference and meaning in human language and his perspective on the nature and function of mental representations. Chomsky's famous 1971 debate on human nature with the French philosopher Michel Foucault was a symbolic clash of the analytic and continental philosophy traditions, represented by Chomsky and Foucault, respectively. It showed what appeared to be irreconcilable differences between two moral and intellectual luminaries of the 20th century. Foucault held that any definition of human nature is connected to our present-day conceptions of ourselves; Chomsky held that human nature contained universals such as a common standard of moral justice as deduced through reason. Chomsky criticized postmodernism and French philosophy generally, arguing that the obscure language of postmodern, leftist philosophers gives little aid to the working classes. He has also debated analytic philosophers, including Tyler Burge, Donald Davidson, Michael Dummett, Saul Kripke, Thomas Nagel, Hilary Putnam, Willard Van Orman Quine, and John Searle. Chomsky's contributions span intellectual and world history, including the history of philosophy. Irony is a recurring characteristic of his writing, such as rhetorically implying that his readers already know something to be true, which engages the reader more actively in assessing the veracity of his claims.

In the 2004 book The Anti-Chomsky Reader, Peter Collier and David Horowitz accuse Chomsky of cherry-picking facts to suit his theories. Horowitz has also criticized Chomsky's anti-Americanism: For 40 years Noam Chomsky has turned out book after book, pamphlet after pamphlet and speech after speech with one message, and one message alone: America is the Great Satan; it is the fount of evil in the world. In Chomsky's demented universe, America is responsible not only for its own bad deeds, but for the bad deeds of others, including those of the terrorists who struck the World Trade Center and the Pentagon. In this attitude he is the medium for all those who now search the ruins of Manhattan not for the victims and the American dead, but for the "root causes" of the catastrophe that befell them. For the conservative public policy think tank the Hoover Institution, Peter Schweizer wrote in January 2006, "Chomsky favors the estate tax and massive income redistribution—just not the redistribution of his income." Schweizer criticized Chomsky for setting up an estate plan and protecting his own intellectual property as it relates to his published works, as well as the high speaking fees that Chomsky received on a regular basis, around $9,000–$12,000 per talk at that time. Mark Bauerlein has accused Chomsky of credulity about socialist or communist regimes while examining capitalist regimes with greater scrutiny or criticism:Chomsky's analysis of U.S. actions plunged deep into dark U.S. machinations, but when traveling among the Communists he rested content with appearances. The countryside outside Hanoi, he reported in The New York Review of Books, displayed "a high degree of democratic participation at the village and regional levels." But how could he tell? Chomsky did not speak Vietnamese, and so he depended on government translators, tour guides, and handlers for information. In [Communist] Vietnamese hands, the clear-eyed skepticism turned into willing credulousness.According to Nikolas Kozloff, writing for Al Jazeera in September 2012, Chomsky "has drawn the world's attention to the various misdeeds of the US and its proxies around the world, and for that he deserves credit. Yet, in seeking to avoid controversy at all costs Chomsky has turned into something of an ideologue. Scour the Chomsky web site and you won't find significant discussion of Belarus or Latin America's flirtation with outside authoritarian leaders, for that matter." Political activist George Monbiot has argued that "Part of the problem is that a kind of cult has developed around Noam Chomsky and John Pilger, which cannot believe they could ever be wrong, and produces ever more elaborate conspiracy theories to justify their mistakes." Defenders of Chomsky have countered that he has been censored or left out of public debate. Claims of this nature date to the Reagan era. Writing for The Washington Post in February 1988, Saul Landau wrote, "It is unhealthy that Chomsky's insights are excluded from the policy debate. His relentless prosecutorial prose, with a hint of Talmudic whine and the rationalist anarchism of Tom Paine, may reflect a justified frustration."

Chomsky has been a defining Western intellectual figure, central to the field of linguistics and definitive in cognitive science, computer science, philosophy, and psychology. In addition to being known as one of the most important intellectuals of his time, Chomsky has a dual legacy as a leader and luminary in both linguistics and the realm of political dissent. Despite his academic success, his political viewpoints and activism have resulted in his being distrusted by mainstream media, and he is regarded as being "on the outer margin of acceptability". Chomsky's public image and social reputation often color his work's public reception.