Anti-communism is opposition to communism. Organized anti-communism developed in reaction to the rise of communism, especially after the 1917 October Revolution in Russia and reaching global dimensions during the Cold War. Anti-communism has been an element of movements of many different positions, including capitalist, liberal, socialist, anarchist, and fascist viewpoints.

Most anti-communists reject the concept of historical materialism, which is a central idea in Marxism. Anti-communists reject the Marxist belief that capitalism will be followed by socialism and communism, just as feudalism was followed by capitalism. Anti-communists question the validity of the Marxist claim that the socialist state will "wither away" when it becomes unnecessary in a true communist society. Anti-communists also accuse communists of having caused several famines that occurred in 20th-century communist states, such as the Russian Famine of 1921 and the much more severe famine in China during the Great Leap Forward.

Anti-communists argue that the repression in the early years of Bolshevik rule, while not as extreme as that during Joseph Stalin's rule, was still severe by reasonable standards, citing examples such as Felix Dzerzhinsky's Cheka secret police, which eliminated numerous political opponents by extrajudicial executions, and the brutal crushing of the Kronstadt rebellion and Tambov rebellion. Some anti-communists refer to both communism and fascism as totalitarianism, seeing similarity between the actions of communist and fascist governments.

Opponents argue that communist parties that have come to power have tended to be rigidly intolerant of political opposition. Communist governments have also been accused of creating a new ruling class (a Nomenklatura), with powers and privileges greater than those previously enjoyed by the upper classes in the non-communist regimes.

Formation Date 1917
Conflict Name Initiation Year Termination Year Total Killed Total Casuality
August Coup in the Soviet Union 1991 1991 1991 unknown unknown