Also called (1925-52) All-Union Communist Party (Bolsheviks), Russian Kommunisticheskaya Partiya Sovetskogo Soyuza, or Vsesoyuznaya Kommunisticheskaya Partiya (Bolshevikov), the major political party of Russia and the Soviet Union from the Russian Revolution of October 1917 to 1991.
The Communist Party of the Soviet Union arose from the Bolshevik wing of the Russian Social Democratic Workers' Party (RSDWP). The Bolsheviks, organised in 1903, were led by Vladimir I. Lenin and argued for a tightly disciplined organisation of professional revolutionaries who were governed by democratic centralism and were dedicated to achieving the dictatorship of the proletariat.
In 1917 they formally broke with the right, or Menshevik, wing of the RSDWP. In 1918, when the Bolsheviks became the ruling party of Russia, they changed their organisation's name to the All-Russian Communist Party; it was renamed the All-Union Communist Party in 1925 after the founding of the USSR and finally to the Communist Party of the Soviet Union in 1952.
The Communist Party arose in opposition to both capitalism and the socialists of the Second International who had supported their capitalist governments during World War I. The name communist was specifically taken to distinguish Lenin's followers in Russia and abroad from such socialists.
Following their victory in the Russian Civil War (1918-20), the Soviet Communists followed a cautious policy of limited capitalism during the New Economic Program until Lenin's death in 1924. Then the powerful general secretary Joseph Stalin and leaders around him moved to assume the leadership of the party.
The Stalin group easily defeated such rival leaders as Leon Trotsky, Grigory Zinoviev, and Lev Kamenev. Then, in the late 1920s, opposition arose from Stalin's ally Nikolay Bukharin to the policies of rapid industrialisation and collectivisation.
Stalin eliminated Bukharin from the leadership in 1929 and sought to eradicate the last remnants of opposition within the party by launching the Great Purge (1934-38), in which many thousands of his real or assumed opponents were executed as traitors and millions more were imprisoned or sent to forced-labour camps. During Stalin's years in power the party's size expanded from about 470,000 members (1924) to several million from the 1930s on.
Following victory in World War II, Stalin faced no further challenges within the party, but discontent with his tyranny and arbitrariness smouldered among the party leadership.
Following Stalin's death in 1953, Nikita Khrushchev began a rapid rise and in 1956 repudiated Stalin's tyrannical excesses in his famous "Secret Speech" at the 20th party congress. The next year he decisively defeated his rivals Vyacheslav Molotov, Georgy Malenkov, and others of the "anti-party group" and became the party's undisputed leader.
Khrushchev ended the practice of bloody purges of the party membership, but his impulsive rule aroused dissatisfaction among the other party leaders, who ousted him in 1964.
Leonid Brezhnev succeeded him and was general secretary until his death in 1982, being in turn succeeded by Yuri Andropov. After Andropov's death in 1984, Konstantin Chernenko became party leader, and after Chernenko's death in 1985 the leadership went to Mikhail Gorbachev, who attempted to liberalise and democratise the party and-more largely-the USSR.
Internationally the CPSU dominated the Communist International (see Comintern) and its successor, the Cominform, from the 1920s on. But the very spread and success of communist parties worldwide brought challenges to the CPSU's hegemony, first from the Yugoslavs in 1948 and then from the Chinese in the late 1950s and early '60s.
The CPSU continued to serve as the model for the Soviet-dominated states of eastern Europe, however, until 1989, at which time the communist parties of eastern Europe either disintegrated or transformed themselves into Western-style socialist (or social democratic) parties.
From 1918 through the 1980s the Communist Party of the Soviet Union was a monolithic, monopolistic ruling party that dominated the political, economic, social, and cultural life of the USSR. The constitution and other legal documents that supposedly ordered and regulated the government of the Soviet Union were in fact subordinate to the policies of the CPSU and its leadership.
Constitutionally, the Soviet government and the CPSU were separate bodies, but virtually all high government officials were party members, and it was this system of interlocking dual membership in party and governmental bodies that enabled the CPSU to both make policy and see that it was enforced by the government.
But by 1990, Mikhail Gorbachev's efforts to restructure the Soviet Union's economy and democratise its political system had eroded both the CPSU's unity and its monopolistic hold on power. In 1990 the CPSU voted to surrender its constitutionally guaranteed monopoly of power, thereby permitting opposition parties to flourish legally in the Soviet Union. The holding of free (and in some cases multiparty) elections in various union republics hastened the decline in the party's membership and enabled defectors from its ranks (such as Boris Yeltsin) to rise to positions of power in republic governments.
Despite these changes, the party remained the principal obstacle to Gorbachev's attempts to reform the Soviet economy along free-market lines. A failed coup by Communist hard-liners against Gorbachev in August 1991 (see August Coup) discredited the CPSU and greatly hastened its decline.
In subsequent months the party was stripped of its physical assets; its control of the Soviet government, internal-security agencies, and armed forces was broken; and the party's activities were suspended.
The dissolution of the Soviet Union on Dec. 25, 1991, into a group of sovereign republics headed by democratically elected governments marked the CPSU's formal demise, though the party's former members retained muchof their control over economic and political decision making in the new republics.
The basic unit of the CPSU was the primary party organisation, which was a feature in all factories, government offices, schools, and collective farms and any other body of any importance whatsoever. At the party's peak size in the early 1980s, there were about 390,000 primary party organisations, and above this lowest level there were district, city, regional, and republic committees. At its height the CPSU had some 19 million members.
Nominally, the supreme body in the CPSU was the party congress, which usually met every five years and was attended by several thousand delegates. The party congress nominally elected the 300 or so members of the Central Committee of the CPSU, which met at least twice a year to perform the work of the party in between congresses.
In its turn the Central Committee elected the members of various party committees, two of which, the Politburo and the Secretariat, were the actual centres of ultimate power and authority in the Soviet Union. The Politburo, with about 24 full members, was the supreme policy-making body in the country and exercised power over every aspect of public policy, both domestic and foreign. The Secretariat was responsible for the day-to-day administrative work of the party machine.
The membership of these bodies, though nominally determined by the Central Committee, was in fact self-perpetuating and was largely determined by those bodies' members themselves.
The training ground for future candidates and members of the party was the All-Union Lenin League of Communist Youth, known as the Komsomol. The principal publications of the party were the daily newspaper Pravda and the monthly theoretical journal Kommunist.