One is that the group of young students from Concepción led by Miguel Enríquez was the most numerous. The second is that the group from Concepción had internally some different ideological profiles, which were represented in the document by the co-authors. Several tendencies were represented on the Central Committee, but later, the only line that prevailed was the Marxist-Leninist. Both Maoists and Trotskyites abandoned MIR or were ousted by the new Secretariat led by Miguel Enriquez. The few anarchist and left liberal cadres supporting the "tendencia social-humanista" and that remained in the organization, were confined to academic tasks and trusted the ideological polemic with the emergent "Christian Humanism" and old Stalinists.