Among his many initiatives of that period, Alicia Penalba’s sculptures and Antonio Berni’s etchings were sent to the São Paulo and Venice Biennales respectively, both artists obtaining First Prize.
It was at this time that he supported the construction of the impressive memorial monument to U.S. President John F. Kennedy by Uruguayan artist Lincoln Presno in Quemú Quemú, a vast deserted plain in the Argentine province of La Pampa; his outspoken inauguration speech as official representative of the OAS, pronounced during the military government of General Juan Carlos Onganía, won public acclaim while provoking angry reactions on the part of the authorities present, earning him the local government’s condemnation as persona non grata, revoked a few years later.
Back in Buenos Aires he has supported culture in all its forms through an incessant activity of lectures in his own country and abroad, prologues for artists’ exhibitions and a constant output of articles on Argentine daily La Nación, with which he collaborated for over twenty years, often sharing the Culture page with Jorge Luis Borges during the Eighties.
Several volumes of Squirru’s poetry and prose writings have been published over the years, most of which are today out of print and considerably difficult to find.
His friends, correspondents and acquaintances included such personalities as Henry Miller, Fernando Demaría, Thomas Merton, Edward Hopper, Ned O'Gorman, Huntington Hartford, Sir Herbert Read, Edward Albee, Oswaldo Vigas, Julio Cortázar, Olga Blinder, Alejandra Pizarnik, Barnaby Conrad, Paul Blackburn, Amancio Williams, Jackie Kennedy and Robert F. Kennedy, Batuz, Renata Adler, J. Carter Brown, Benjamin Bradlee, Nina Auchincloss Straight, Kay Halle, Alberto Ginastera, Elsa Wiezell, Hiram D. Williams, Leopoldo Marechal, Arthur Schlesinger Jr., Stefan Baciu, Emilio Pettoruti, Antonio Berni, Eduardo Mac Entyre, Pérez Celis, Leopoldo Presas, Leonardo Castellani and Marco Denevi.