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In the same line of revisiting recent South American art movements for traces of anarchistic explorations that could reinvigorate stale aesthetics and philosophies here and there, there was the movement called Tropicália or Tropicalismo https://en.wikipedia.org/wiki/Tropic%C3%A1lia :

"The anarchistic, anti-authoritarian musical and lyrical expressions of the Tropicalistas soon made them a target of censorship and repression by the military junta that ruled Brazil in this period, as did the fact some of the collective, including Veloso and Gil, also actively participated in anti-government demonstrations. The Tropicalistas' passionate interest in the new wave of American and British psychedelic music of the period - most notably the work of The Beatles - also put them at odds with Marxist-influenced students on Brazil's left, whose aesthetic agenda was strongly nationalistic, and oriented towards 'traditional' Brazilian musical forms. This leftist faction vigorously rejected anything - especially Tropicalismo - which they perceived as being tainted by the corrupting influences of Western capitalist popular culture. The politico-artistic tensions between leftist students and the Tropicalistas reached a climax in September 1968, with Caetano Veloso's watershed performances at the third International Song Festival, held in the auditorium of Rio's Catholic University, where the audience not surprisingly included a large contingent of left-wing students."