The cultural re-organization of Cambodian society by the dictator Pol Pot
created a government which tried to re-make its society anti-intellectual in what became known as Democratic Kampuchea
(1975–1979), a de-industrialized, agricultural country
In the Night of the Long Batons
(29 July 1966), the federal police physically purged politically-incorrect academics who opposed the right-wing military dictatorship of Juan Carlos Onganía
(1966–1970) in Argentina
from five faculties of the University of Buenos Aires
In the 20th century, societies have systematically removed intellectuals from power, to expediently end public political dissent. During the Cold War (1945–1991), the Czechoslovak Socialist Republic (1948–1990) ostracized the philosopher Václav Havel as a politically-unreliable man unworthy of ordinary Czechs' trust; the post-communist Velvet Revolution (17 November – 29 December 1989) elected Havel president for ten years. Ideologically-extreme dictatorships who mean to recreate a society such as the Khmer Rouge rule of Cambodia (1975–1979) pre-emptively killed potential political opponents, especially the educated middle-class and the intelligentsia. To realize the Year Zero of Cambodian history, Khmer Rouge social engineering restructured the economy by de-industrialization and assassinated non-communist Cambodians suspected of "involvement in free-market activities" such as the urban professionals of society (physicians, attorneys, engineers, et al.) and people with political connections to foreign governments. The doctrine of Pol Pot identified the farmers as the true proletariat of Cambodia and the true representatives of the working class entitled to hold government power, hence the anti-intellectual purges.
In 1966, the anti-communist Argentine military dictatorship of General Juan Carlos Onganía (1966–1970) intervened at the University of Buenos Aires with the Night of the Long Batons to physically dislodge politically-dangerous academics from five university faculties. That expulsion to exile of the academic intelligentsia became a national brain drain upon the society and economy of Argentina. In support of the military repression of free speech, biochemist César Milstein said: "Our country would be put in order, as soon as all the intellectuals who were meddling in the region were expelled".
However, anti-intellectualism is not always violent. Any social group can act anti-intellectually by discounting the humanist value to their society of intellect, intellectualism, and higher education.