Climate encompasses the statistics of temperature, humidity, atmospheric pressure, wind, rainfall, atmospheric particle count and other meteorological elemental measurements in a given region over long periods. Climate can be contrasted to weather, which is the present condition of these elements and their variations over shorter periods.

A region's climate is generated by the climate system, which has five components: Atmosphere, hydrosphere, cryosphere, land surface, and biosphere.

The climate of a location is affected by its latitude, terrain, and altitude, as well as nearby water bodies and their currents. Climates can be classified according to the average and the typical ranges of different variables, most commonly temperature and precipitation. The most commonly used classification scheme was originally developed by Wladimir Köppen. The Thornthwaite system, in use since 1948, incorporates evapotranspiration along with temperature and precipitation information and is used in studying animal species diversity and potential effects of climate changes. The Bergeron and Spatial Synoptic Classification systems focus on the origin of air masses that define the climate of a region.

Paleoclimatology is the study of ancient climates. Since direct observations of climate are not available before the 19th century, paleoclimates are inferred from ''proxy variables'' that include non-biotic evidence such as sediments found in lake beds and ice cores, and biotic evidence such as tree rings and coral. Climate models are mathematical models of past, present and future climates. Climate change may occur over long and short timescales from a variety of factors; recent warming is discussed in global warming.

Definition

Climate (from Ancient Greek ''klima'', meaning ''inclination'') is commonly defined as the weather averaged over a long period. The standard averaging period is 30 years, but other periods may be used depending on the purpose. Climate also includes statistics other than the average, such as the magnitudes of day-to-day or year-to-year variations. The Intergovernmental Panel on Climate Change (IPCC) glossary definition is:

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The difference between climate and weather is usefully summarized by the popular phrase "Climate is what you expect, weather is what you get." Over historical time spans there are a number of nearly constant variables that determine climate, including latitude, altitude, proportion of land to water, and proximity to oceans and mountains. These change only over periods of millions of years due to processes such as plate tectonics. Other climate determinants are more dynamic: the thermohaline circulation of the ocean leads to a 5 °C (9 °F) warming of the northern Atlantic Ocean compared to other ocean basins. Other ocean currents redistribute heat between land and water on a more regional scale. The density and type of vegetation coverage affects solar heat absorption, water retention, and rainfall on a regional level. Alterations in the quantity of atmospheric greenhouse gases determines the amount of solar energy retained by the planet, leading to global warming or global cooling. The variables which determine climate are numerous and the interactions complex, but there is general agreement that the broad outlines are understood, at least insofar as the determinants of historical climate change are concerned.

Climate classification

There are several ways to classify climates into similar regimes. Originally, climes were defined in Ancient Greece to describe the weather depending upon a location's latitude. Modern climate classification methods can be broadly divided into ''genetic'' methods, which focus on the causes of climate, and ''empiric'' methods, which focus on the effects of climate. Examples of genetic classification include methods based on the relative frequency of different air mass types or locations within synoptic weather disturbances. Examples of empiric classifications include climate zones defined by plant hardiness, evapotranspiration, or more generally the Köppen climate classification which was originally designed to identify the climates associated with certain biomes. A common shortcoming of these classification schemes is that they produce distinct boundaries between the zones they define, rather than the gradual transition of climate properties more common in nature.

Bergeron and Spatial Synoptic

The simplest classification is that involving air masses. The Bergeron classification is the most widely accepted form of air mass classification. Air mass classification involves three letters. The first letter describes its moisture properties, with c used for continental air masses (dry) and m for maritime air masses (moist). The second letter describes the thermal characteristic of its source region: T for tropical, P for polar, A for Arctic or Antarctic, M for monsoon, E for equatorial, and S for superior air (dry air formed by significant downward motion in the atmosphere). The third letter is used to designate the stability of the atmosphere. If the air mass is colder than the ground below it, it is labeled k. If the air mass is warmer than the ground below it, it is labeled w. While air mass identification was originally used in weather forecasting during the 1950s, climatologists began to establish synoptic climatologies based on this idea in 1973.

Based upon the Bergeron classification scheme is the Spatial Synoptic Classification system (SSC). There are six categories within the SSC scheme: Dry Polar (similar to continental polar), Dry Moderate (similar to maritime superior), Dry Tropical (similar to continental tropical), Moist Polar (similar to maritime polar), Moist Moderate (a hybrid between maritime polar and maritime tropical), and Moist Tropical (similar to maritime tropical, maritime monsoon, or maritime equatorial).

Köppen

The Köppen classification depends on average monthly values of temperature and precipitation. The most commonly used form of the Köppen classification has five primary types labeled A through E. These primary types are A, tropical; B, dry; C, mild mid-latitude; D, cold mid-latitude; and E, polar. The five primary classifications can be further divided into secondary classifications such as rain forest, monsoon, tropical savanna, humid subtropical, humid continental, oceanic climate, Mediterranean climate, steppe, subarctic climate, tundra, polar ice cap, and desert.

Rain forests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between and . Mean monthly temperatures exceed during all months of the year.

A monsoon is a seasonal prevailing wind which lasts for several months, ushering in a region's rainy season. Regions within North America, South America, Sub-Saharan Africa, Australia and East Asia are monsoon regimes.

A tropical savanna is a grassland biome located in semiarid to semi-humid climate regions of subtropical and tropical latitudes, with average temperatures remain at or above year round and rainfall between and a year. They are widespread on Africa, and are found in India, the northern parts of South America, Malaysia, and Australia.

The humid subtropical climate zone where winter rainfall (and sometimes snowfall) is associated with large storms that the westerlies steer from west to east. Most summer rainfall occurs during thunderstorms and from occasional tropical cyclones. Humid subtropical climates lie on the east side continents, roughly between latitudes 20° and 40° degrees away from the equator.

A humid continental climate is marked by variable weather patterns and a large seasonal temperature variance. Places with more than three months of average daily temperatures above and a coldest month temperature below and which do not meet the criteria for an arid or semiarid climate, are classified as continental.

An oceanic climate is typically found along the west coasts at the middle latitudes of all the world's continents, and in southeastern Australia, and is accompanied by plentiful precipitation year round.

The Mediterranean climate regime resembles the climate of the lands in the Mediterranean Basin, parts of western North America, parts of Western and South Australia, in southwestern South Africa and in parts of central Chile. The climate is characterized by hot, dry summers and cool, wet winters.

A steppe is a dry grassland with an annual temperature range in the summer of up to and during the winter down to .

A subarctic climate has little precipitation, and monthly temperatures which are above for one to three months of the year, with permafrost in large parts of the area due to the cold winters. Winters within subarctic climates usually include up to six months of temperatures averaging below .

Tundra occurs in the far Northern Hemisphere, north of the taiga belt, including vast areas of northern Russia and Canada.

A polar ice cap, or polar ice sheet, is a high-latitude region of a planet or moon that is covered in ice. Ice caps form because high-latitude regions receive less energy as solar radiation from the sun than equatorial regions, resulting in lower surface temperatures.

A desert is a landscape form or region that receives very little precipitation. Deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures (in summer up to 45 °C or 113 °F), and low nighttime temperatures (in winter down to 0 °C; 32 °F) due to extremely low humidity. Many deserts are formed by rain shadows, as mountains block the path of moisture and precipitation to the desert.

Thornthwaite

Devised by the American climatologist and geographer C. W. Thornthwaite, this climate classification method monitors the soil water budget using evapotranspiration. It monitors the portion of total precipitation used to nourish vegetation over a certain area. It uses indices such as a humidity index and an aridity index to determine an area's moisture regime based upon its average temperature, average rainfall, and average vegetation type. The lower the value of the index in any given area, the drier the area is.

The moisture classification includes climatic classes with descriptors such as hyperhumid, humid, subhumid, subarid, semi-arid (values of −20 to −40), and arid (values below −40). Humid regions experience more precipitation than evaporation each year, while arid regions experience greater evaporation than precipitation on an annual basis. A total of 33 percent of the Earth's landmass is considered either arid of semi-arid, including southwest North America, southwest South America, most of northern and a small part of southern Africa, southwest and portions of eastern Asia, as well as much of Australia. Studies suggest that precipitation effectiveness (PE) within the Thornthwaite moisture index is overestimated in the summer and underestimated in the winter. This index can be effectively used to determine the number of herbivore and mammal species numbers within a given area. The index is also used in studies of climate change.

Thermal classifications within the Thornthwaite scheme include microthermal, mesothermal, and megathermal regimes. A microthermal climate is one of low annual mean temperatures, generally between and which experiences short summers and has a potential evaporation between and . A mesothermal climate lacks persistent heat or persistent cold, with potential evaporation between and . A megathermal climate is one with persistent high temperatures and abundant rainfall, with potential annual evaporation in excess of .

Record

Modern

Details of the modern climate record are known through the taking of measurements from such weather instruments as thermometers, barometers, and anemometers during the past few centuries. The instruments used to study weather over the modern time scale, their known error, their immediate environment, and their exposure have changed over the years, which must be considered when studying the climate of centuries past.

Paleoclimatology

Paleoclimatology is the study of past climate over a great period of the Earth's history. It uses evidence from ice sheets, tree rings, sediments, coral, and rocks to determine the past state of the climate. It demonstrates periods of stability and periods of change and can indicate whether changes follow patterns such as regular cycles.

Climate change

Climate change is the variation in global or regional climates over time. It reflects changes in the variability or average state of the atmosphere over time scales ranging from decades to millions of years. These changes can be caused by processes internal to the Earth, external forces (e.g. variations in sunlight intensity) or, more recently, human activities.

In recent usage, especially in the context of environmental policy, the term "climate change" often refers only to changes in modern climate, including the rise in average surface temperature known as global warming. In some cases, the term is also used with a presumption of human causation, as in the United Nations Framework Convention on Climate Change (UNFCCC). The UNFCCC uses "climate variability" for non-human caused variations.

Earth has undergone periodic climate shifts in the past, including four major ice ages. These consisting of glacial periods where conditions are colder than normal, separated by interglacial periods. The accumulation of snow and ice during a glacial period increases the surface albedo, reflecting more of the Sun's energy into space and maintaining a lower atmospheric temperature. Increases in greenhouse gases, such as by volcanic activity, can increase the global temperature and produce an interglacial. Suggested causes of ice age periods include the positions of the continents, variations in the Earth's orbit, changes in the solar output, and volcanism.

Climate models

Climate models use quantitative methods to simulate the interactions of the atmosphere, oceans, land surface and ice. They are used for a variety of purposes from study of the dynamics of the weather and climate system to projections of future climate. All climate models balance, or very nearly balance, incoming energy as short wave (including visible) electromagnetic radiation to the earth with outgoing energy as long wave (infrared) electromagnetic radiation from the earth. Any imbalance results in a change in the average temperature of the earth.

The most talked-about applications of these models in recent years have been their use to infer the consequences of increasing greenhouse gases in the atmosphere, primarily carbon dioxide (see greenhouse gas). These models predict an upward trend in the global mean surface temperature, with the most rapid increase in temperature being projected for the higher latitudes of the Northern Hemisphere.

Models can range from relatively simple to quite complex:

Simple radiant heat transfer model that treats the earth as a single point and averages outgoing energy

this can be expanded vertically (radiative-convective models), or horizontally

finally, (coupled) atmosphere–ocean–sea ice global climate models discretise and solve the full equations for mass and energy transfer and radiant exchange.

See also

Atmosphere

Climate Prediction Center

Ecosystem

Effect of sun angle on climate

Greenhouse effect

List of climate scientists

Microclimate

National Climatic Data Center

Outline of meteorology

Solar variation

Temperature extreme

Tropical marine climate

Weather

References

External links

The Earth's climate – Centre national de la recherche scientifique (CNRS – France)

NOAA Climate Services Portal

IGBP Climate-change Index

The Economics of Climate-based Data NOAA Economics

AgClimate IFAS

Climate Models and modeling groups

Climate Prediction Project

WorldClimate

ESPERE Climate Encyclopaedia

Climate index and mode information regarding the Arctic

A current view of the Bering Sea Ecosystem and Climate

Climate: Data and charts for world and US locations

MIL-HDBK-310, Global Climate Data U.S. Department of Defense Data on natural environmental starting points for engineering analyses to derive environmental design criteria

ClimateDiagrams.com Climate diagrams for over 3 000 weather stations and different climate periods from around the world. Users can create their own diagrams with their own data.

IPCC Data Distribution Centre Climate data and guidance on its use.

Category:Basic meteorological concepts and phenomena Category:Greek loanwords

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color	#B0C4DE
name	Avram Noam Chomsky
birth date	December 07, 1928
birth place	Philadelphia, Pennsylvania
residence	U.S.
nationality	American
field	Linguistics
alma mater	University of Pennsylvania (BA 1949, MA 1951, Ph.D 1955)
Work institutions	MIT
known for	Generative grammaruniversal grammartransformational grammargovernment and binding theoryX-bar theoryChomsky hierarchycontext-free grammarprinciples and parametersMinimalist programlanguage acquisition devicepoverty of the stimulusChomsky–Schützenberger theoremChomsky normal formpropaganda model
Signature	Noam Chomsky signature.svg }}

Avram Noam Chomsky (; born December 7, 1928) is an American linguist, philosopher, cognitive scientist, and activist. He is an Institute Professor and Professor (Emeritus) of in the Department of Linguistics & Philosophy at MIT. Chomsky has been described as the "father of modern linguistics" and a major figure of analytic philosophy. His work has influenced fields such as computer science, mathematics, and psychology.

Chomsky is credited as the creator or co-creator of the Chomsky hierarchy theorem, the universal grammar theory, and the Chomsky–Schützenberger theorem.

Chomsky is known for his critiques of U.S. foreign policy, and he has been described as a prominent cultural figure. His social criticism has included ''Manufacturing Consent: The Political Economy of the Mass Media'' (1988), co-written with Edward S. Herman, an analysis articulating the propaganda model theory for examining the media.

According to the Arts and Humanities Citation Index in 1992, Chomsky was cited as a source more often than any other living scholar from 1980 to 1992. He is also the eighth most cited source of all time, and is considered the "most cited living author". Chomsky is the author of over 100 books.

Life and career

Chomsky was born on the morning of December 7, 1928, to Jewish parents in the affluent East Oak Lane neighborhood of Philadelphia, Pennsylvania, the son of noted professor of Hebrew at Gratz College and IWW (Industrial Workers of the World) member William Chomsky (1896–1977), a native of Ukraine. His mother, Elsie Chomsky (née Simonofsky)—a native of what is present-day Belarus—grew up in the United States and, unlike her husband, spoke "ordinary New York English". Chomsky's parents' first language was Yiddish, but Chomsky said it was "taboo" in his family to speak it. Although Chomsky's mother was part of the radical activism in the 1930s, he was influenced largely by his uncle who, having never passed 4th grade, owned a newsstand that acted as an "intellectual center [where] professors of this and that argu[ed] all night". Chomsky was influenced also by being a part of a Hebrew-based, Zionist organization, as well as by hanging around anarchist bookstores.

He describes his family as living in a sort of "Jewish ghetto", split into a "Yiddish side" and "Hebrew side", with his family aligning with the latter and bringing him up "immersed in Hebrew culture and literature", though he means more a "cultural ghetto than a physical one". Chomsky also describes tensions he experienced with Irish Catholics and German Catholics and anti-semitism in the mid-1930s. He recalls "beer parties" celebrating the fall of Paris to the Nazis. In a discussion of the irony of his staying in the 1980s in a Jesuit House in Central America, Chomsky explained that during his childhood, "We were the only Jewish family around. I grew up with a visceral fear of Catholics. They're the people who beat you up on your way to school. So I knew when they came out of that building down the street, which was the Jesuit school, they were raving anti-Semites. So childhood memories took a long time to overcome."

Chomsky remembers the first article he wrote was at age 10 while a student at Oak Lane Country Day School about the threat of the spread of fascism, following the fall of Barcelona in the Spanish Civil War. From the age of 12 or 13, he identified more fully with anarchist politics.

A graduate of Central High School of Philadelphia, Chomsky began studying philosophy and linguistics at the University of Pennsylvania in 1945, taking classes with philosophers such as C. West Churchman and Nelson Goodman and linguist Zellig Harris. Harris's teaching included his discovery of transformations as a mathematical analysis of language structure (mappings from one subset to another in the set of sentences). Chomsky referred to the morphophonemic rules in his 1951 master's thesis—''The Morphophonemics of Modern Hebrew''—as transformations in the sense of Carnap's 1938 notion of rules of transformation (vs. rules of formation), and subsequently reinterpreted the notion of grammatical transformations in a very different way from Harris, as operations on the productions of a context-free grammar (derived from Post production systems). Harris's political views were instrumental in shaping those of Chomsky. Chomsky earned a BA in 1949 and an MA in 1951.

In 1949, he married linguist Carol Schatz. They remained married for 59 years until her death from cancer in December 2008. The couple had two daughters, Aviva (b. 1957) and Diane (b. 1960), and a son, Harry (b. 1967). With his wife Carol, Chomsky spent time in 1953 living in HaZore'a, a kibbutz in Israel. Asked in an interview whether the stay was "a disappointment" Chomsky replied, "No, I loved it"; however, he "couldn't stand the ideological atmosphere" and "fervent nationalism" in the early 1950s at the kibbutz, with Stalin being defended by many of the left-leaning kibbutz members who chose to paint a rosy image of future possibilities and contemporary realities in the USSR. Chomsky notes seeing many positive elements in the commune-like living of the kibbutz, in which parents and children lived together in separate houses, and when asked whether there were "lessons that we have learned from the history of the kibbutz", responded, that in "some respects, the kibbutzim came closer to the anarchist ideal than any other attempt that lasted for more than a very brief moment before destruction, or that was on anything like a similar scale. In these respects, I think they were extremely attractive and successful; apart from personal accident, I probably would have lived there myself – for how long, it's hard to guess."

Chomsky received his PhD in linguistics from the University of Pennsylvania in 1955. He conducted part of his doctoral research during four years at Harvard University as a Harvard Junior Fellow. In his doctoral thesis, he began to develop some of his linguistic ideas, elaborating on them in his 1957 book ''Syntactic Structures'', one of his best-known works in linguistics.

Chomsky joined the staff of MIT in 1955 and in 1961 was appointed full professor in the Department of Modern Languages and Linguistics (now the Department of Linguistics and Philosophy). From 1966 to 1976 he held the Ferrari P. Ward Professorship of Modern Languages and Linguistics, and in 1976 he was appointed Institute Professor. As of 2010, Chomsky has taught at MIT continuously for 55 years.

In February 1967, Chomsky became one of the leading opponents of the Vietnam War with the publication of his essay, "The Responsibility of Intellectuals", in ''The New York Review of Books''. This was followed by his 1969 book, ''American Power and the New Mandarins,'' a collection of essays that established him at the forefront of American dissent. His far-reaching criticisms of U.S. foreign policy and the legitimacy of U.S. power have raised controversy he is frequently sought out for his views by publications and news outlets internationally. In 1977 he delivered the Huizinga Lecture in Leiden, the Netherlands, under the title: ''Intellectuals and the State''.

Chomsky has received death threats because of his criticisms of U.S. foreign policy. He was also on a list of planned targets created by Theodore Kaczynski, better known as the Unabomber; during the period that Kaczynski was at large, Chomsky had all of his mail checked for explosives. He states that he often receives undercover police protection, in particular while on the MIT campus, although he does not agree with the police protection.

Chomsky resides in Lexington, Massachusetts, and travels often, giving lectures on politics.

Contributions to linguistics

Chomskyan linguistics, beginning with his ''Syntactic Structures'', a distillation of his '' Logical Structure of Linguistic Theory'' (1955, 75), challenges structural linguistics and introduces transformational grammar. This approach takes utterances (sequences of words) to have a syntax characterized by a formal grammar; in particular, a context-free grammar extended with transformational rules.

Perhaps his most influential and time-tested contribution to the field, is the claim that modeling knowledge of language using a formal grammar accounts for the "productivity" or "creativity" of language. In other words, a formal grammar of a language can explain the ability of a hearer-speaker to produce and interpret an infinite number of utterances, including novel ones, with a limited set of grammatical rules and a finite set of terms. He has always acknowledged his debt to Pāṇini for his modern notion of an explicit generative grammar although it is also related to Rationalist ideas of a priori knowledge.

It is a popular misconception that Chomsky ''proved'' that language is entirely innate and ''discovered'' a "universal grammar" (UG). In fact, Chomsky simply observed that 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 child will always acquire the ability to understand and produce language, while the kitten will never acquire either ability. Chomsky labeled whatever the relevant capacity the human has which the cat lacks the "language acquisition device" (LAD) and suggested that one of the tasks for linguistics should be to figure out what the LAD is and what constraints it puts on the range of possible human languages. The universal features that would result from these constraints are often termed "universal grammar" or UG.

The Principles and Parameters approach (P&P)—developed in his Pisa 1979 Lectures, later published as ''Lectures on Government and Binding'' (LGB)—makes strong claims regarding universal grammar: that the grammatical principles underlying languages are innate and fixed, and the differences among the world's languages can be characterized in terms of parameter settings in the brain (such as the pro-drop parameter, which indicates whether an explicit subject is always required, as in English, or can be optionally dropped, as in Spanish), which are often likened to switches. (Hence the term principles and parameters, often given to this approach.) In this view, a child learning a language need only acquire the necessary lexical items (words, grammatical morphemes, and idioms), and determine the appropriate parameter settings, which can be done based on a few key examples.

Proponents of this view argue that the pace at which children learn languages is inexplicably rapid, unless children have an innate ability to learn languages. The similar steps followed by children all across the world when learning languages, and the fact that children make certain characteristic errors as they learn their first language, whereas other seemingly logical kinds of errors never occur (and, according to Chomsky, should be attested if a purely general, rather than language-specific, learning mechanism were being employed), are also pointed to as motivation for innateness.

More recently, in his Minimalist Program (1995), while retaining the core concept of "principles and parameters," Chomsky attempts a major overhaul of the linguistic machinery involved in the LGB model, stripping from it all but the barest necessary elements, while advocating a general approach to the architecture of the human language faculty that emphasizes principles of economy and optimal design, reverting to a derivational approach to generation, in contrast with the largely representational approach of classic P&P.

Chomsky's ideas have had a strong influence on researchers of the language acquisition in children, though many researchers in this area such as Elizabeth Bates and Michael Tomasello argue very strongly against Chomsky's theories, and instead advocate emergentist or connectionist theories, explaining language with a number of general processing mechanisms in the brain that interact with the extensive and complex social environment in which language is used and learned.

His best-known work in phonology is ''The Sound Pattern of English'' (1968), written with Morris Halle (and often known as simply ''SPE''). This work has had a great significance for the development in the field. While phonological theory has since moved beyond "SPE phonology" in many important respects, the SPE system is considered the precursor of some of the most influential phonological theories today, including autosegmental phonology, lexical phonology and optimality theory. Chomsky no longer publishes on phonology.

Generative grammar

The Chomskyan approach towards syntax, often termed generative grammar, studies grammar as a body of knowledge possessed by language users. Since the 1960s, Chomsky has maintained that much of this knowledge is innate, implying that children need only learn certain parochial features of their native languages. The innate body of linguistic knowledge is often termed Universal Grammar. From Chomsky's perspective, the strongest evidence for the existence of Universal Grammar is simply the fact that children successfully acquire their native languages in so little time. Furthermore, he argues that there is an enormous gap between the linguistic stimuli to which children are exposed and the rich linguistic knowledge they attain (the "poverty of the stimulus" argument). The knowledge of Universal Grammar would serve to bridge that gap.

Chomsky's theories have been immensely influential within linguistics, but they have also received criticism. One recurring criticism of the Chomskyan variety of generative grammar is that it is Anglocentric and Eurocentric, and that often linguists working in this tradition have a tendency to base claims about Universal Grammar on a very small sample of languages, sometimes just one. Initially, the Eurocentrism was exhibited in an overemphasis on the study of English. However, hundreds of different languages have now received at least some attention within Chomskyan linguistic analyses. In spite of the diversity of languages that have been characterized by UG derivations, critics continue to argue that the formalisms within Chomskyan linguistics are Anglocentric and misrepresent the properties of languages that are different from English. Thus, Chomsky's approach has been criticized as a form of linguistic imperialism. In addition, Chomskyan linguists rely heavily on the intuitions of native speakers regarding which sentences of their languages are well-formed. This practice has been criticized on general methodological grounds. Some psychologists and psycholinguists, though sympathetic to Chomsky's overall program, have argued that Chomskyan linguists pay insufficient attention to experimental data from language processing, with the consequence that their theories are not psychologically plausible. Other critics (see language learning) have questioned whether it is necessary to posit Universal Grammar to explain child language acquisition, arguing that domain-general learning mechanisms are sufficient.

Today there are many different branches of generative grammar; one can view grammatical frameworks such as head-driven phrase structure grammar, lexical functional grammar and combinatory categorial grammar as broadly Chomskyan and generative in orientation, but with significant differences in execution.

Chomsky hierarchy

Chomsky is famous for investigating various kinds of formal languages and whether or not they might be capable of capturing key properties of human language. His Chomsky hierarchy partitions formal grammars into classes, or groups, with increasing expressive power, i.e., each successive class can generate a broader set of formal languages than the one before. Interestingly, Chomsky argues that modeling some aspects of human language requires a more complex formal grammar (as measured by the Chomsky hierarchy) than modeling others. For example, while a regular language is powerful enough to model English morphology, it is not powerful enough to model English syntax. In addition to being relevant in linguistics, the Chomsky hierarchy has also become important in computer science (especially in compiler construction and automata theory). Indeed, there is an equivalence between the Chomsky language hierarchy and the different kinds of automata. Thus theorems about languages are often dealt with as either languages (grammars) or automata.

An alternate method of dealing with languages is based upon Formal Power series. Formal Power series as well as the relationship between languages and semi-groups continued to occupy M. P. Schützenberger at the Sorbonne. Formal Power Series are similar to the Taylor Series one encounters in a course on Calculus, and is especially useful for languages where words (terminal symbols) are commutative.

Contributions to psychology

Chomsky's work in linguistics has had profound implications for modern psychology. For Chomsky, linguistics is a branch of cognitive psychology; genuine insights in linguistics imply concomitant understandings of aspects of mental processing and human nature. His theory of a universal grammar was seen by many as a direct challenge to the established behaviorist theories of the time and had major consequences for understanding how children learn language and what, exactly, the ability to use language is.

In 1959, Chomsky published an influential critique of B.F. Skinner's ''Verbal Behavior'', a book in which Skinner offered a theoretical account of language in functional, behavioral terms. He defined "Verbal Behavior" as learned behavior that has characteristic consequences delivered through the learned behavior of others. This makes for a view of communicative behaviors much larger than that usually addressed by linguists. Skinner's approach focused on the circumstances in which language was used; for example, asking for water was functionally a different response than labeling something as water, responding to someone asking for water, etc. These functionally different kinds of responses, which required in turn separate explanations, sharply contrasted both with traditional notions of language and Chomsky's psycholinguistic approach. Chomsky thought that a functionalist explanation restricting itself to questions of communicative performance ignored important questions. (Chomsky—Language and Mind, 1968). He focused on questions concerning the operation and development of innate structures for syntax capable of creatively organizing, cohering, adapting and combining words and phrases into intelligible utterances.

In the review Chomsky emphasized that the scientific application of behavioral principles from animal research is severely lacking in explanatory adequacy and is furthermore particularly superficial as an account of human verbal behavior because a theory restricting itself to external conditions, to "what is learned," cannot adequately account for generative grammar. Chomsky raised the examples of rapid language acquisition of children, including their quickly developing ability to form grammatical sentences, and the universally creative language use of competent native speakers to highlight the ways in which Skinner's view exemplified under-determination of theory by evidence. He argued that to understand human verbal behavior such as the creative aspects of language use and language development, one must first postulate a genetic linguistic endowment. The assumption that important aspects of language are the product of universal innate ability runs counter to Skinner's radical behaviorism.

Chomsky's 1959 review has drawn fire from a number of critics, the most famous criticism being that of Kenneth MacCorquodale's 1970 paper ''On Chomsky’s Review of Skinner’s Verbal Behavior'' (''Journal of the Experimental Analysis of Behavior,'' volume 13, pages 83–99). MacCorquodale's argument was updated and expanded in important respects by Nathan Stemmer in a 1990 paper, ''Skinner's Verbal Behavior, Chomsky's review, and mentalism'' (''Journal of the Experimental Analysis of Behavior,'' volume 54, pages 307–319). These and similar critiques have raised certain points not generally acknowledged outside of behavioral psychology, such as the claim that Chomsky did not possess an adequate understanding of either behavioral psychology in general, or the differences between Skinner's behaviorism and other varieties. Consequently, it is argued that he made several serious errors. On account of these perceived problems, the critics maintain that the review failed to demonstrate what it has often been cited as doing. As such, it is averred that those most influenced by Chomsky's paper probably either already substantially agreed with Chomsky or never actually read it. The review has been further critiqued for misrepresenting the work of Skinner and others, including by quoting out of context. Chomsky has maintained that the review was directed at the way Skinner's variant of behavioral psychology "was being used in Quinean empiricism and naturalization of philosophy."

It has been claimed that Chomsky's critique of Skinner's methodology and basic assumptions paved the way for the "cognitive revolution", the shift in American psychology between the 1950s through the 1970s from being primarily behavioral to being primarily cognitive. In his 1966 ''Cartesian Linguistics'' and subsequent works, Chomsky laid out an explanation of human language faculties that has become the model for investigation in some areas of psychology. Much of the present conception of how the mind works draws directly from ideas that found their first persuasive author of modern times in Chomsky.

There are three key ideas. First is that the mind is "cognitive", or that the mind actually contains mental states, beliefs, doubts, and so on. Second, he argued that most of the important properties of language and mind are innate. The acquisition and development of a language is a result of the unfolding of innate propensities triggered by the experiential input of the external environment. The link between human innate aptitude to language and heredity has been at the core of the debate opposing Noam Chomsky to Jean Piaget at the Abbaye de Royaumont in 1975 (''Language and Learning. The Debate between Jean Piaget and Noam Chomsky,'' Harvard University Press, 1980). Although links between the genetic setup of humans and aptitude to language have been suggested at that time and in later discussions, we are still far from understanding the genetic bases of human language. Work derived from the model of selective stabilization of synapses set up by Jean-Pierre Changeux, Philippe Courrège and Antoine Danchin, and more recently developed experimentally and theoretically by Jacques Mehler and Stanislas Dehaene in particular in the domain of numerical cognition lend support to the Chomskyan "nativism". It does not, however, provide clues about the type of rules that would organize neuronal connections to permit language competence. Subsequent psychologists have extended this general "nativist" thesis beyond language. Lastly, Chomsky made the concept of "modularity" a critical feature of the mind's cognitive architecture. The mind is composed of an array of interacting, specialized subsystems with limited flows of inter-communication. This model contrasts sharply with the old idea that any piece of information in the mind could be accessed by any other cognitive process (optical illusions, for example, cannot be "turned off" even when they are known to be illusions).

Approach to science

Chomsky sees science as a straightforward search for explanation, and rejects the views of it as a catalog of facts or mechanical explanations. In this light, the majority of his contributions to science have been frameworks and hypotheses, rather than "discoveries."

As such, he considers certain so-called post-structuralist or postmodern critiques of logic and reason to be nonsensical:

I have spent a lot of my life working on questions such as these, using the only methods I know of; those condemned here as "science", "rationality," "logic," and so on. I therefore read the papers with some hope that they would help me "transcend" these limitations, or perhaps suggest an entirely different course. I'm afraid I was disappointed. Admittedly, that may be my own limitation. Quite regularly, "my eyes glaze over" when I read polysyllabic discourse on the themes of poststructuralism and postmodernism; what I understand is largely truism or error, but that is only a fraction of the total word count. True, there are lots of other things I don't understand: the articles in the current issues of math and physics journals, for example. But there is a difference. In the latter case, I know how to get to understand them, and have done so, in cases of particular interest to me; and I also know that people in these fields can explain the contents to me at my level, so that I can gain what (partial) understanding I may want. In contrast, no one seems to be able to explain to me why the latest post-this-and-that is (for the most part) other than truism, error, or gibberish, and I do not know how to proceed.

Although Chomsky believes that a scientific background is important to teach proper reasoning, he holds that science in general is "inadequate" to understand complicated problems like human affairs:

Science talks about very simple things, and asks hard questions about them. As soon as things become too complex, science can’t deal with them... But it’s a complicated matter: Science studies what’s at the edge of understanding, and what’s at the edge of understanding is usually fairly simple. And it rarely reaches human affairs. Human affairs are way too complicated.

Debates

Chomsky has been known to vigorously defend and debate his views and opinions, in philosophy, linguistics, and politics. He has had notable debates with such varied intellectuals as Jean Piaget, Michel Foucault, William F. Buckley, Jr., Christopher Hitchens, George Lakoff, Richard Perle, Hilary Putnam, Willard Quine, and Alan Dershowitz, to name a few. In response to his speaking style being criticized as boring, Chomsky said that "I'm a boring speaker and I like it that way.... I doubt that people are attracted to whatever the persona is.... People are interested in the issues, and they're interested in the issues because they are important." "We don't want to be swayed by superficial eloquence, by emotion and so on."

Political views

Chomsky has stated that his "personal visions are fairly traditional anarchist ones, with origins in The Enlightenment and classical liberalism" and he has praised libertarian socialism. Chomsky tries to avoid the ambiguity of labels, although he has described himself as an anarcho-syndicalist. He is a member of the Campaign for Peace and Democracy and the Industrial Workers of the World international union. He published a book on anarchism titled ''Chomsky on Anarchism'', published by the anarchist book collective AK Press in 2006.

Chomsky has engaged in political activism all of his adult life and expressed opinions on politics and world events, which are widely cited, publicized and discussed. Chomsky has in turn argued that his views are those the powerful do not want to hear and for this reason he is considered an American political dissident.

Chomsky asserts that authority, unless justified, is inherently illegitimate and that the burden of proof is on those in authority. If this burden can't be met, the authority in question should be dismantled. Authority for its own sake is inherently unjustified. An example given by Chomsky of a legitimate authority is that exerted by an adult to prevent a young child from wandering into traffic. He contends that there is little moral difference between chattel slavery and renting one's self to an owner or "wage slavery". He feels that it is an attack on personal integrity that undermines individual freedom. He holds that workers should own and control their workplace, a view held (as he notes) by the Lowell Mill Girls.

Chomsky has strongly criticized the foreign policy of the United States. He claims double standards in a foreign policy preaching democracy and freedom for all while allying itself with non-democratic and repressive organizations and states such as Chile under Augusto Pinochet and argues that this results in massive human rights violations. He often argues that America's intervention in foreign nations, including the secret aid given to the Contras in Nicaragua, an event of which he has been very critical, fits any standard description of terrorism, including "official definitions in the US Code and Army Manuals in the early 1980s." Before its collapse, Chomsky also condemned Soviet imperialism; for example in 1986 during a question/answer following a lecture he gave at Universidad Centroamericana in Nicaragua, when challenged about how he could "talk about North American imperialism and Russian imperialism in the same breath," Chomsky responded: "One of the truths about the world is that there are two superpowers, one a huge power which happens to have its boot on your neck; another, a smaller power which happens to have its boot on other people's necks. I think that anyone in the Third World would be making a grave error if they succumbed to illusions about these matters."

Regarding the killing of Osama Bin Laden, Chomsky believes that the United States acted improperly, saying "We might ask ourselves how we would be reacting if Iraqi commandos landed at George W. Bush's compound, assassinated him, and dumped his body in the Atlantic. Uncontroversially, his crimes vastly exceed bin Laden’s, and he is not a 'suspect' but uncontroversially the 'decider' who gave the orders to commit the 'supreme international crime differing only from other war crimes in that it contains within itself the accumulated evil of the whole' (quoting the Nuremberg Tribunal) for which Nazi criminals were hanged: the hundreds of thousands of deaths, millions of refugees, destruction of much of the country, the bitter sectarian conflict that has now spread to the rest of the region."

He has argued that the mass media in the United States largely serve as a propaganda arm and "bought priesthood" of the U.S. government and U.S. corporations, with the three parties intertwined through common interests. In a famous reference to Walter Lippmann, Chomsky along with his coauthor Edward S. Herman has written that the American media manufactures consent among the public. Chomsky has condemned the 2010 supreme court ruling revoking the limits on campaign finance, calling it "corporate takeover of democracy."

Chomsky opposes the U.S. global "war on drugs", claiming its language is misleading, and refers to it as "the war on certain drugs." He favors drug policy reform, in education and prevention rather than military or police action as a means of reducing drug use. In an interview in 1999, Chomsky argued that, whereas crops such as tobacco receive no mention in governmental exposition, other non-profitable crops, such as marijuana are attacked because of the effect achieved by persecuting the poor: He has stated:

U.S. domestic drug policy does not carry out its stated goals, and policymakers are well aware of that. If it isn't about reducing substance abuse, what is it about? It is reasonably clear, both from current actions and the historical record, that substances tend to be criminalized when they are associated with the so-called dangerous classes, that the criminalization of certain substances is a technique of social control.

Chomsky is critical of the American "state capitalist" system and big business, he describes himself as a socialist, specifically an anarcho-syndicalist and is therefore strongly critical of "authoritarian" Marxist and/or Leninist and/or Maoist branches of socialism. He also believes that socialist values exemplify the rational and morally consistent extension of original unreconstructed classical liberal and radical humanist ideas to an industrial context. He believes that society should be highly organized and based on democratic control of communities and work places. He believes that the radical humanist ideas of his two major influences, Bertrand Russell and John Dewey, were "rooted in the Enlightenment and classical liberalism, and retain their revolutionary character."

Chomsky has stated that he believes the United States remains the "greatest country in the world", a comment that he later clarified by saying, "Evaluating countries is senseless and I would never put things in those terms, but that some of America's advances, particularly in the area of free speech, that have been achieved by centuries of popular struggle, are to be admired." He has also said "In many respects, the United States is the freest country in the world. I don't just mean in terms of limits on state coercion, though that's true too, but also in terms of individual relations. The United States comes closer to classlessness in terms of interpersonal relations than virtually any society."

Chomsky objects to the criticism that anarchism is inconsistent with support for government welfare, stating in part:

One can, of course, take the position that we don't care about the problems people face today, and want to think about a possible tomorrow. OK, but then don't pretend to have any interest in human beings and their fate, and stay in the seminar room and intellectual coffee house with other privileged people. Or one can take a much more humane position: I want to work, today, to build a better society for tomorrow – the classical anarchist position, quite different from the slogans in the question. That's exactly right, and it leads directly to support for the people facing problems today: for enforcement of health and safety regulation, provision of national health insurance, support systems for people who need them, etc. That is not a sufficient condition for organizing for a different and better future, but it is a necessary condition. Anything else will receive the well-merited contempt of people who do not have the luxury to disregard the circumstances in which they live, and try to survive.

Chomsky holds views that can be summarized as anti-war but not strictly pacifist. He prominently opposed the Vietnam War and most other wars in his lifetime. He expressed these views with tax resistance and peace walks. In 1968, he signed the “Writers and Editors War Tax Protest” pledge, vowing to refuse tax payments in protest against the Vietnam War. He published a number of articles about the war in Vietnam, including "The Responsibility of Intellectuals". He maintains that U.S. involvement in World War II to defeat the Axis powers was probably justified, with the caveat that a preferable outcome would have been to end or prevent the war through earlier diplomacy. He believes that the dropping of nuclear bombs on Hiroshima and Nagasaki were "among the most unspeakable crimes in history".

Chomsky has made many criticisms of the Israeli government, its supporters, the United States' support of the government and its treatment of the Palestinian people, arguing that " 'supporters of Israel' are in reality supporters of its moral degeneration and probable ultimate destruction" and that "Israel's very clear choice of expansion over security may well lead to that consequence." Chomsky disagreed with the founding of Israel as a Jewish state, saying, "I don't think a Jewish or Christian or Islamic state is a proper concept. I would object to the United States as a Christian state." Chomsky hesitated before publishing work critical of Israeli policies while his parents were alive, because he "knew it would hurt them" he says, "mostly because of their friends, who reacted hysterically to views like those expressed in my work." On May 16, 2010, Israeli authorities detained Chomsky and ultimately refused his entry to the West Bank via Jordan. A spokesman for the Israeli Prime Minister indicated that the refusal of entry was simply due to a border guard who "overstepped his authority" and a second attempt to enter would likely be allowed. Chomsky disagreed, saying that the Interior Ministry official who interviewed him was taking instructions from his superiors. Chomsky maintained that based on the several hours of interviewing, he was denied entry because of the things he says and because he was visiting a university in the West Bank but no Israeli universities.

Chomsky has a broad view of free-speech rights, especially in the mass media, and opposes censorship. He has stated that "with regard to freedom of speech there are basically two positions: you defend it vigorously for views you hate, or you reject it and prefer Stalinist/fascist standards". With reference to the United States diplomatic cables leak, Chomsky suggested that "perhaps the most dramatic revelation ... is the bitter hatred of democracy that is revealed both by the U.S. Government -- Hillary Clinton, others -- and also by the diplomatic service." Chomsky refuses to take legal action against those who may have libeled him and prefers to counter libels through open letters in newspapers. One notable example of this approach is his response to an article by Emma Brockes in ''The Guardian'' which alleged he denied the existence of the Srebrenica massacre. Chomsky's complaint prompted The Guardian to publish an apologetic correction and to withdraw the article from the paper's website.

Chomsky has frequently stated that there is no connection between his work in linguistics and his political views and is generally critical of the idea that competent discussion of political topics requires expert knowledge in academic fields. In a 1969 interview, he said regarding the connection between his politics and his work in linguistics:

I still feel myself that there is a kind of tenuous connection. I would not want to overstate it but I think it means something to me at least. I think that anyone's political ideas or their ideas of social organization must be rooted ultimately in some concept of human nature and human needs.

Some critics have accused Chomsky of hypocrisy when, in spite of his political criticism of American and European military imperialism, early research at the institution (MIT) where he did his linguistic research had been substantially funded by the American military. Chomsky makes the argument that because he has received funding from the U.S. Military, he has an even greater responsibility to criticize and resist its immoral actions.

Influence in other fields

''Chomskyan'' models have been used as a theoretical basis in several other fields. The Chomsky hierarchy is often taught in fundamental computer science courses as it confers insight into the various types of formal languages. This hierarchy can also be discussed in mathematical terms and has generated interest among mathematicians, particularly combinatorialists. Some arguments in evolutionary psychology are derived from his research results.

The 1984 Nobel Prize laureate in Medicine and Physiology, Niels K. Jerne, used Chomsky's generative model to explain the human immune system, equating "components of a generative grammar ... with various features of protein structures". The title of Jerne's Stockholm Nobel lecture was "The Generative Grammar of the Immune System".

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.

Famous computer scientist Donald Knuth admits to reading Syntactic Structures during his honeymoon and being greatly influenced by it. "...I must admit to taking a copy of Noam Chomsky's Syntactic Structures along with me on my honeymoon in 1961 ... Here was a marvelous thing: a mathematical theory of language in which I could use a computer programmer's intuition!".

Another focus of Chomsky's political work has been an analysis of mainstream mass media (especially in the United States), its structures and constraints, and its perceived role in supporting big business and government interests.

Edward S. Herman and Chomsky's book ''Manufacturing Consent: The Political Economy of the Mass Media'' (1988) explores this topic in depth, presenting their "propaganda model" of the news media with numerous detailed case studies demonstrating it. According to this propaganda model, more democratic societies like the U.S. use subtle, non-violent means of control, unlike totalitarian systems, where physical force can readily be used to coerce the general population. In an often-quoted remark, Chomsky states that "propaganda is to a democracy what the bludgeon is to a totalitarian state." (Media Control)

The model attempts to explain this perceived systemic bias of the mass media in terms of structural economic causes rather than a conspiracy of people. It argues the bias derives from five "filters" that all published news must "pass through," which combine to systematically distort news coverage.

In explaining the first filter, ownership, he notes that most major media outlets are owned by large corporations. The second, funding, notes that the outlets derive the majority of their funding from advertising, not readers. Thus, since they are profit-oriented businesses selling a product—readers and audiences—to other businesses (advertisers), the model expects them to publish news that reflects the desires and values of those businesses. In addition, the news media are dependent on government institutions and major businesses with strong biases as sources (the third filter) for much of their information. Flak, the fourth filter, refers to the various pressure groups that attack the media for supposed bias. Norms, the fifth filter, refer to the common conceptions shared by those in the profession of journalism. (Note: in the original text, published in 1988, the fifth filter was "anticommunism". However, with the fall of the Soviet Union, it has been broadened to allow for shifts in public opinion.) The model describes how the media form a decentralized and non-conspiratorial but nonetheless very powerful propaganda system, that is able to mobilize an élite consensus, frame public debate within élite perspectives and at the same time give the appearance of democratic consent.

Chomsky and Herman test their model empirically by picking "paired examples"—pairs of events that were objectively similar except for the alignment of domestic élite interests. They use a number of such examples to attempt to show that in cases where an "official enemy" does something (like murder of a religious official), the press investigates thoroughly and devotes a great amount of coverage to the matter, thus victims of "enemy" states are considered "worthy". But when the domestic government or an ally does the same thing (or worse), the press downplays the story, thus victims of US or US client states are considered "unworthy."

They also test their model against the case that is often held up as the best example of a free and aggressively independent press, the media coverage of the Tet Offensive during the Vietnam War. Even in this case, they argue that the press was behaving subserviently to élite interests.

Academic achievements, awards and honors

In early 1969, he delivered the John Locke Lectures at Oxford University; in January 1970, the Bertrand Russell Memorial Lecture at University of Cambridge; in 1972, the Nehru Memorial Lecture in New Delhi; in 1977, the Huizinga Lecture in Leiden; in 1988 the Massey Lectures at the University of Toronto, titled "Necessary Illusions: Thought Control in Democratic Societies"; in 1997, The Davie Memorial Lecture on Academic Freedom in Cape Town, and many others.

Chomsky has received many honorary degrees from universities around the world, including from the following:

University of London

University of Chicago

Loyola University of Chicago

Swarthmore College

University of Delhi

Bard College

University of Massachusetts

University of Pennsylvania

Georgetown University

Amherst College

University of Cambridge

University of Colorado

University of Buenos Aires

McGill University

Rovira i Virgili University

Columbia University

Villanova University

University of Connecticut

University of Maine

Scuola Normale Superiore

University of Western Ontario

University of Toronto

Harvard University

Universidad de Chile

University of Bologna

Universidad de La Frontera

University of Calcutta

Universidad Nacional de Colombia

Vrije Universiteit Brussel

Santo Domingo Institute of Technology

Uppsala University

University of Athens

University of Cyprus

Central Connecticut State University

National Autonomous University of Mexico (UNAM)

Peking University National Tsing Hua University He is a member of the American Academy of Arts and Sciences, the National Academy of Sciences, and the American Philosophical Society. In addition, he is a member of other professional and learned societies in the United States and abroad, and is a recipient of the Distinguished Scientific Contribution Award of the American Psychological Association, the Kyoto Prize in Basic Sciences, the Helmholtz Medal, the Dorothy Eldridge Peacemaker Award, the 1999 Benjamin Franklin Medal in Computer and Cognitive Science, and others. He is twice winner of The Orwell Award, granted by The National Council of Teachers of English for "Distinguished Contributions to Honesty and Clarity in Public Language" (in 1987 and 1989).

He is a member of the Serbian Academy of Sciences and Arts in Department of Social Sciences.

Chomsky is a member of the Faculty Advisory Board of the MIT Harvard Research Journal.

In 2005, Chomsky received an honorary fellowship from the Literary and Historical Society. In 2007, Chomsky received The Uppsala University (Sweden) Honorary Doctor's degree in commemoration of Carolus Linnaeus. In February 2008, he received the President's Medal from the Literary and Debating Society of the National University of Ireland, Galway. Since 2009 he is honorary member of IAPTI.

In 2010, Chomsky received the Erich Fromm Prize in Stuttgart, Germany. In April 2010, Chomsky became the third scholar to receive the University of Wisconsin's A.E. Havens Center's Award for Lifetime Contribution to Critical Scholarship.

Chomsky has an Erdős number of four.

Chomsky was voted the leading living public intellectual in The 2005 Global Intellectuals Poll conducted by the British magazine ''Prospect''. He reacted, saying "I don't pay a lot of attention to polls". In a list compiled by the magazine ''New Statesman'' in 2006, he was voted seventh in the list of "Heroes of our time".

Actor Viggo Mortensen with avant-garde guitarist Buckethead dedicated their 2006 album, called ''Pandemoniumfromamerica'' to Chomsky.

On January 22, 2010, a special honorary concert for Chomsky was given at Kresge Auditorium at MIT. The concert, attended by Chomsky and dozens of his family and friends, featured music composed by Edward Manukyan and speeches by Chomsky's colleagues, including David Pesetsky of MIT and Gennaro Chierchia, head of the linguistics department at Harvard University.

In June 2011, Chomsky was awarded the Sydney Peace Prize, which cited his "unfailing courage, critical analysis of power and promotion of human rights".

Bibliography

Filmography

''Manufacturing Consent: Noam Chomsky and the Media'', Director: Mark Achbar and Peter Wintonick (1992)

''Last Party 2000'', Director: Rebecca Chaiklin and Donovan Leitch (2001)

''Power and Terror: Noam Chomsky in Our Times'', Director: John Junkerman (2002)

''Distorted Morality—America's War On Terror?'', Director: John Junkerman (2003)

''Noam Chomsky: Rebel Without a Pause'' (TV), Director: Will Pascoe (2003)

''The Corporation'', Directors: Mark Achbar and Jennifer Abbott; Writer: Joel Bakan (2003)

''Peace, Propaganda & the Promised Land'', Directors: Sut Jhally and Bathsheba Ratzkoff (2004)

''On Power, Dissent and Racism: A discussion with Noam Chomsky'', Journalist: Nicolas Rossier; Producers: Eli Choukri, Baraka Productions (2004)

''Lake of Fire'', Director: Tony Kaye (2006)

American Feud: A History of Conservatives and Liberals, Director: Richard Hall (2008)

In the Time We've Got, Director: Christopher Ives (2008)

''Chomsky & Cie'' Director: Olivier Azam (out in 2008)

''An Inconvenient Tax'', Director: Christopher P. Marshall (out in 2009)

''The Money Fix,'' Director: Alan Rosenblith (2009)

''Pax Americana and the Weaponization of Space'', Director: Denis Delestrac (2010)

''Article 12: Waking up in a surveillance society'', Director: Juan Manuel Biaiñ (2010)

See also

American philosophy

Axiom of categoricity

Chomskybot

Colorless green ideas sleep furiously

English studies

Important publications in computability

Knowledge worker

List of American philosophers

References

External links

chomsky.info official website

Noam Chomsky at MIT

Noam Chomsky articles on libcom.org

Noam Chomsky at ''Democracy Now!''

Column archive at ''The Guardian''

Articles and videos featuring Noam Chomsky at AnarchismToday.org

;Interviews and articles

Talks by Noam Chomsky at A-Infos Radio Project

Interview about Human Rights by scholars (English with French subtitles) – 2009

Chomsky media files at the Internet Archive

Noam Chomsky interviewed by Alyssa McDonald on New Statesman, September 2010.

The Real News (TRNN) ">Noam Chomsky Interviews on The Real News (TRNN)

Hegemony or Survival: America's Quest for Global Dominance -discussion on the "Bush doctrine" and its implications, C-SPAN, Feb 2004

Philosophies of Language & Politics -talk at The Commonwealth Club, October 2009

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Martin Crawford is Director of the Agroforestry Research Trust, a British charity which conducts research into temperate agroforestry.

Martin Crawford has spent over twenty years in organic agriculture and horticulture and is director of The Agroforestry Research Trust, a non-profit-making charity that researches into temperate agroforestry and all aspects of plant cropping and uses, with a focus on tree, shrub and perennial crops. It produces several publications and a quarterly journal, and sells plants and seeds.

Books

Creating a Forest Garden: Working with Nature to Grow Edible Crops

External links

Category:Living people