Osvaldo Bayer (Santa Fe Province, Argentina, 18 February 1927) is an Argentine anarcho-communist historian, journalist and film scenarist. He lives today mostly in Buenos Aires, he had a home in Berlin, where he went into exile during the "National Reorganization Process" dictatorship (1976 1983). Self-designed as an "ultra-pacifist anarchist", Osvaldo Bayer was raised in Bernal, in the Province of Buenos Aires, and then in Belgrano, Buenos Aires. His parents, however, were living in Rio Gallegos during the strike in the 1920s which led to the Patagonia rebelde movement.