Stalinism is the means of governing and Marxist–Leninist policies implemented in the Soviet Union (USSR) from 1927 to 1953 by Joseph Stalin. It included the creation of a one-party totalitarian police state, rapid industrialization, the theory of socialism in one country, collectivization of agriculture, intensification of class conflict, a cult of personality, and subordination of the interests of foreign communist parties to those of the Communist Party of the Soviet Union, which Stalinism deemed the leading vanguard party of communist revolution at the time. After Stalin's death and the Khrushchev Thaw, a period of de-Stalinization began in the 1950s and 1960s, which caused the influence of Stalin's ideology to begin to wane in the USSR.