When MIR was founded on 12 October 1965 at the locals of an anarchist union in Santiago, less than 100 participated, and all the above ideological tendencies were represented. Revolutionary socialists (by Miguel Enríquez and B. Van Schowen), former communists (represented by the Maoist Cares), Trotskyists (by Dr. Enrique Sepúlveda and Marco Antonio Enríquez, Miguel Enríquez's brother), left-libertarians or social anarchists (by Marcello Ferrada de Noli), and anarcho-sindicalists (by Clotario Blest). It took some time before the MIR finally could achieve its ultimate identification as a solely Marxist-Leninist political organization, and this was the work of Miguel Enríquez for the two years to come.