Stalin implemented radical policies of industrialization, collectivization, and terror that transformed the Soviet Union into a global superpower but resulted in immense human costs. Millions died from famine during collectivization as peasants were forced off their land into collective farms. Stalin also purged perceived political opponents through mass arrests, executions, and imprisonment in the Gulag system. While industrial output increased dramatically, the Soviet people suffered under Stalin's brutal totalitarian rule characterized by censorship, propaganda, and constant fear of repression or death.