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 (until 1939), forced 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, deemed by Stalinism to be 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.
Stalin's regime forcibly purged society of what it saw as threats to itself and its brand of communism (so-called "enemies of the people"), which included political dissidents, non-Soviet nationalists, the bourgeoisie, better-off peasants ("kulaks"), and those of the working class who demonstrated "counter-revolutionary" sympathies. This resulted in mass repression of such people and their families, including mass arrests, show trials, executions, and imprisonment in forced labour camps known as gulags. The most notorious examples were the Great Purge and the Dekulakization campaign. Stalinism was also marked by militant atheism, mass anti-religious persecution, and ethnic cleansing through forced deportations. However, there was a short era of reconciliation between the Orthodox Church and the state authorities in WW2. Some historians, such as Robert Service, have blamed Stalinist policies, particularly the collectivization policies, for causing famines such as the Holodomor. Other historians and scholars disagree on the role of Stalinism.
