Trade associations In 1931, together with Fernando Vives founded the Social League of Chile, who became general secretary in 1935. In those years, prohibited from forming trade unions and as a way of organizing workers, tackles the foundation of sports and cultural clubs. So ADIP born in 1938 (Public Institutions Sports Association). These foundations are the prelude to the union movement in Chile. In 1943 creates the ANEF (National Fiscal Employees Association), which also chairs. The aim was to improve the social, cultural and economic needs of workers, and is the creation of these small institutions the platform to drive the labor movement. This is done, finally, with the creation of the CUT (Central Workers Union) on February 15, 1953, which remains in operation until 1973. This institution brings together all workers in the country, and is characterized by its emphasis on the fight of their rights and interests over political differences.His presidency was held by Blest until 1961. In 1965, along with other union leaders founded the Movimiento de Izquierda Revolucionaria (MIR), which leaves after differences with the younger generation concerning control strategies among these new leaders were Miguel Enr quez, Luciano Cruz , Bautista van Schouwen and Andres Pascal Allende. In 1976, due to the existing dictatorial regime, revive the Committee for the Defence of Human Rights that he had founded in 1970. This was a secular institution, unlike the Vicariate of Solidarity, founded the same year (1976). During the same time helps to create the Association of Relatives of the Disappeared and Political Executions, whose headquarters was for years at home.