The General Secretary of the Central Committee of the Communist Party of the Soviet Union was an office of the Communist Party of the Soviet Union (CPSU) that by the late 1920s had evolved into the most powerful of the Central Committee's various secretaries. With a few exceptions, from 1929 until the union's dissolution the holder of the office was the de facto leader of the Soviet Union, because the post controlled both the CPSU and the Soviet government. Joseph Stalin elevated the office to overall command of the Communist Party and by extension the whole Soviet Union. Nikita Khrushchev renamed the post First Secretary in 1953; the change was reverted in 1966.
The office grew out of less powerful secretarial positions within the party: Technical Secretary (1917–1918), Chairman of the Secretariat (1918–1919), Responsible Secretary (1919–1922) (when Lenin was leader of the party of Bolsheviks).
In its first two incarnations the office performed mostly secretarial work. The post of Responsible Secretary was then established in 1919 to perform administrative work. In 1922, the office of General Secretary followed as a purely administrative and disciplinary position, whose role was to do no more than determine party membership composition. Stalin, its first incumbent, used the principles of democratic centralism to transform his office into that of party leader, and later leader of the Soviet Union.
In 1934, the 17th Party Congress refrained from formally re-electing Stalin as General Secretary. However, Stalin was re-elected into all other positions and remained leader of the party without diminishment.
In the 1950s, Stalin increasingly withdrew from Secretariat business, leaving the supervision of the body to Georgy Malenkov, possibly to test him as a potential successor. In October 1952, at the 19th Party Congress, Stalin restructured the party's leadership. His request, voiced through Malenkov, to be relieved of his duties in the party secretariat due to his age, was rejected by the party congress, as delegates were unsure about Stalin's intentions. In the end, the congress formally abolished Stalin's office of General Secretary, though Stalin remained one of the party secretaries and maintained ultimate control of the Party. When Stalin died on 5 March 1953, Malenkov was the most important member of the Secretariat, which also included Nikita Khrushchev, among others. Under a short-lived troika of Malenkov, Beria, and Molotov, Malenkov became Chairman of the Council of Ministers but was forced to resign from the Secretariat nine days later on 14 March, leaving Khrushchev in effective control of the body. Khrushchev was elected to the new office of First Secretary at the Central Committee plenum on 14 September of the same year. Khrushchev removed his rivals from power in both 1955 and (especially) 1957 and reinforced the supremacy of the First Secretary.
In 1964, opposition within the Politburo and the Central Committee led to Khrushchev's removal as First Secretary. Leonid Brezhnev succeeded Khrushchev to the post as part of another collective leadership, together with Premier Alexei Kosygin and others. The office was renamed General Secretary in 1966. The collective leadership was able to limit the powers of the General Secretary during the Brezhnev Era. Brezhnev's influence grew throughout the 1970s as he was able to retain support by avoiding any radical reforms. Yuri Andropov and Konstantin Chernenko ruled the country in the same way as Brezhnev had. Mikhail Gorbachev ruled the Soviet Union as General Secretary until 1990, when the Communist Party lost its monopoly of power over the political system. The office of President of the Soviet Union was established so that Gorbachev still retained his role as leader of the Soviet Union. Following the failed August coup of 1991, Gorbachev resigned as General Secretary. He was succeeded by his deputy, Vladimir Ivashko, who only served for five days as Acting General Secretary before Boris Yeltsin, the President of Russia, suspended all activity in the Communist Party. Following the party's ban, the Union of Communist Parties – Communist Party of the Soviet Union (UCP–CPSU) was established by Oleg Shenin in 1993. The UCP–CPSU works as a framework for reviving and restoring the CPSU. The organisation has members in all the former Soviet republics.