List of leaders of the Soviet Union
Following Joseph Stalin's consolidation of power in the 1920s, the post of the General Secretary of the Central Committee of the Communist Party became synonymous with leader of the Soviet Union, because the post controlled both the Communist Party and the Soviet Government, both indirectly, via Party membership, and via the tradition of a single person holding two highest posts: in the Party and in the government. The post of the General Secretary was abolished in 1952 under Stalin and later re-established by Nikita Khrushchev under the name of First Secretary. In 1966, Leonid Brezhnev reverted the office title to its former name. Being the head of the Communist Party of the Soviet Union (CPSU), the office of the General Secretary was the highest in the Soviet Union until 1990. The post of General Secretary lacked clear guidelines of succession, so after the death or removal of a Soviet leader the successor usually needed the support of the Politburo, the Central Committee, or another government or party apparatus to both take and stay in power. The President of the Soviet Union, an office created in March 1990, replaced the General Secretary as the highest Soviet political office.
Central Committee of the Communist Party of the Soviet Union
When Stalin died on 5 March 1953, Georgy Malenkov, a Deputy Chairman of the Council of Ministers succeeded him as Chairman and as the "de facto" leading figure of the Presidium (the renamed Politburo). A power struggle between Malenkov and Khrushchev began, and on 14 March Malenkov was forced to resign from the Secretariat. The official explanation for his resignation was "to grant the request of Chairman of the USSR Council of Ministers G. M. Malenkov to be released from the duties of the Party Central Committee". Malenkov's resignation made Khrushchev the senior member within the Secretariat, and made him powerful enough to set the agenda of the Presidium meetings alongside Malenkov. Khrushchev was able to consolidate his powers within the party machine after Malenkov's resignation, but Malenkov remained the "de facto" leading figure of the Party. Together with Malenkov's and Khrushchev's accession of power, another figure, Lavrentiy Beria was also contending for power. The three formed a short-lived Troika, which lasted until Khrushchev and Malenkov betrayed Beria. Beria, an ethnic Georgian, was the Presidium member for internal security affairs, and he was a strong supporter for minority rights and even supported reuniting East and West Germany to establish a strong, and neutral Germany between the capitalist and socialist nations. It was Beria, through an official pronouncement by the Ministry of Internal Affairs (MVD) and not by the Central Committee or the Council of Ministers, who renounced the Doctor's Plot as a fraud.