Institute of Red Professors
He came from a Jewish working-class family. In the years 1925-1929 he studied philosophy at the Institute of Red Professors, which had the responsibility for educating a new Soviet intelligentsia. Mitin became a member of the Russian Communist Party (Bolsheviks) in 1919. In the years 1939-1961 he was a member of the Central Committee of the Communist Party of the Soviet Union and during the period 1950-1962 deputy of the Supreme Soviet of the USSR. From 1944 to 1950 he served on the editorial board of the journal "Bolshevik" ("Большевик" ). From 1939, for five years he was director of the Institute of Marxism-Leninism of the CPSU Central Committee.