 While in Peru, he became familiar with Víctor Raúl Haya de la Torre and drew intellectual inspiration from the founder of the Alianza Popular Revolucionaria Americana (American Popular Revolutionary Alliance, APRA).Later, he would participate in debates and conferences at universities throughout the United States.Santucho was one of the driving forces behind the Junta Coordinadora Revolucionaria (Revolutionary Coordinating Junta), a regional organization composed of Argentina's PRT, Bolivia's Ñancahuazú Guerrilla organization, Chile's Revolutionary Left Movement, and Uruguay's Tupamaros group.