Fidel Castro's endorsement of Salvador Allende's revolutionary program in August 1970 was determined by global transformations and changing priorities within both Chile and Cuba. Since 1968, favorable prospects for the Left encouraged Havana to abandon its radicalism premised on the inevitability of armed struggle. Prior to 1970 Chile gradually promoted rapprochement with the socialist world and lessened Cuba's hemispheric isolation, imposed by the Organization of American States. It is within this framework that the meeting between Cuba's and Chile's revolutions has to be understood. Allende, knowing that Castro's support would push the radical Left to side with Popular Unity in the 1970 elections, sent a delegation to convince the Cubans that socialism could be achieved by peaceful means. These events and strategic discussions within Chile and Cuba reveal how the history of the Left needs to be placed in a broad context defined by the complex unfolding of domestic, hemispheric, and international transformations shaping Latin America in the 1960s.