The Communist Party of the Soviet Union (CPSU) was the founding and ruling political party of the Soviet Union. The CPSU was the sole governing party of the Soviet Union until 1990, when the Congress of People's Deputies modified Article 6 of the most recent 1977 Soviet constitution, which had granted the CPSU a monopoly over the political system.
The party was founded in 1912 by the Bolsheviks, a majority faction detached from the Russian Social Democratic Labour Party, led by Vladimir Lenin, who seized power in the October Revolution of 1917. After 74 years, it was dissolved on 29 August 1991 on Soviet territory, soon after a failed coup d'état by hard-line CPSU leaders against Soviet president and party general secretary Mikhail Gorbachev. It was completely outlawed three months later on 6 November 1991 on Russian territory.
The CPSU was a Communist party, organized on the basis of democratic centralism. This principle, conceived by Lenin, entails democratic and open discussion of policy issues within the party followed by the requirement of total unity in upholding the agreed policies. The highest body within the CPSU was the Party Congress, which convened every five years. When the Congress was not in session, the Central Committee was the highest body. Because the Central Committee met twice a year, most day-to-day duties and responsibilities were vested in the Politburo, (previously the Presidium), the Secretariat and the Orgburo (until 1952). The party leader was the head of government and held the office of either General Secretary, Premier or head of state, or some of the three offices concurrently—but never all three at the same time. The party leader was the de facto chairman of the CPSU Politburo and chief executive of the Soviet Union. The tension between the party and the state (Council of Ministers of the Soviet Union) for the shifting focus of power was never formally resolved, but in reality the party dominated and a paramount leader always existed (first Lenin and thereafter the General Secretary).
After the founding of the Soviet Union in 1922, Lenin had introduced a mixed economy, commonly referred to as the New Economic Policy, which allowed for capitalist practices to resume under the Communist Party dictation in order to develop the necessary conditions for socialism to become a practical pursuit in the economically undeveloped country. In 1929, as Joseph Stalin became the leader of the party, Marxism–Leninism, a fusion of the original ideas of German philosopher and economic theorist Karl Marx, and Lenin, became formalized as the party's guiding ideology and would remain so throughout the rest of its existence. The party pursued state socialism, under which all industries were nationalized and a command economy was implemented. After recovering from the Second World War, reforms were implemented which decentralized economic planning and liberalized Soviet society in general under Nikita Khrushchev. By 1980, various factors, including the continuing Cold War, and ongoing nuclear arms race with the United States and other Western European powers and unaddressed inefficiencies in the economy, led to stagnant economic growth under Alexei Kosygin, and further with Leonid Brezhnev and a growing disillusionment. After the younger, vigorous Mikhail Gorbachev (b. 1931), assumed leadership in 1985, (following two short-term elderly leaders who quickly died in succession), rapid steps were taken to transform the tottering Soviet economic system in the direction of a market economy once again. Gorbachev and his allies envisioned the introduction of an economy similar to Lenin's earlier New Economic Policy through a program of "perestroika", or restructuring, but their reforms, along with the institution of free multi-candidate elections led to a decline in the party's power, and after the dissolution of the Soviet Union, the banning of the party by later last RSFSR President Boris Yeltsin and subsequent first President of an evolving democratic and free market economy of the successor Russian Federation.
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