Georgian Marxist revolutionary and later virtual dictator of the USSR (1928--53). Born in Gori, Georgia, the son of a cobbler and ex-serf. He studied at Tiflis Orthodox Theological Seminary, from which he was expelled in 1899. After joining a Georgian Social Democratic organization (1898), he became active in the revolutionary underground, and was twice exiled to Siberia (1902, 1913). As a leading Bolshevik he played an active role in the October Revolution, and became people's commissar for nationalities in the first Soviet government and a member of the Communist Party Politburo. In 1922 he became general secretary of the Party Central Committee, a post he held until his death, and also occupied other key positions which enabled him to build up enormous personal power in the party and government apparatus. After Lenin's death (1924) he pursued a policy of building "socialism in one country', and gradually isolated and disgraced his political rivals, notably Trotsky. In 1928 he launched the campaign for the collectivization of agriculture during which millions of peasants perished, and the first 5-year plan for the forced industrialization of the economy.