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.
First Deputy Premier of the Soviet Union
The First Deputy Premier of the Soviet Union, also known as First Vice Premier of the Soviet Union, was the deputy head of government of the Union of Soviet Socialist Republics (USSR); despite the title, the office was not necessarily held by a single individual. A total of 26 individuals had held this post; 18 of them held other posts simultaneously with their First Deputy Premiership. The first officeholder was Valerian Kuibyshev, who was inaugurated in 1934 as First Deputy Chairman of the Council of People's Commissars (, abbreviated Sovnarkom). Lavrentiy Beria spent the shortest time in office and served for 113 days. At over seventeen years, Vyacheslav Molotov spent the longest time in office, and held his position through most of Joseph Stalin's tenure as Premier, as well as through the tenureships of Georgy Malenkov and Nikolai Bulganin.