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.
Premier of the Soviet Union
The Premier of the Soviet Union () was the head of government of the Union of Soviet Socialist Republics (USSR). Twelve individuals became Premier during the time span of the office. Two of the twelve Premiers died in office of natural causes (Vladimir Lenin and Joseph Stalin), three resigned (Alexei Kosygin, Nikolai Tikhonov and Ivan Silayev) and three had the offices of party secretary and Premier simultaneously (Lenin, Stalin and Nikita Khrushchev). The first Premier was Lenin, who was inaugurated during 1922 after the Treaty on the Creation of the Soviet Union. Ivan Silayev spent the briefest time in office at 126 days during 1991. At more than fourteen years, Kosygin spent the longest time in office and became the only premier to serve in more than two government cabinets. He died soon after his resignation during 1980.