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.
Lazar Kaganovich
In 1924, Kaganovich became a member of the Central Committee. From 1925 to 1928, Kaganovich was the First Secretary of the Communist Party of the Ukrainian SSR. He was given the task of "ukrainizatsiya" – meaning at that time the building up of Ukrainian communist popular cadres. He also had the duty of implementing collectivization and the policy of economic suppression of the kulaks (wealthier peasants). He opposed the more moderate policy of Nikolai Bukharin, who argued in favor of the "peaceful integration of kulaks into socialism". In 1928, due to numerous protests against Kaganovich's management, Stalin was forced to transfer Kaganovich from Ukraine to Moscow, where he returned to his position as a Secretary of the Central Committee of the Communist Party, a job he held until 1939. As Secretary, he endorsed Stalin's struggle against the so-called Left and Right Oppositions within the Communist Party, in the hope that Stalin would become the sole leader of the country. In 1933 and 1934, he served as the Chairman of the Commission for the Vetting of the Party Membership ("Tsentralnaya komissiya po proverke partiynykh ryadov") and ensured personally that nobody associated with anti-Stalin opposition would be permitted to remain a Communist Party member. In 1934, at the XVII Congress of the Communist Party, Kaganovich chaired the Counting Committee. He falsified voting for positions in the Central Committee, deleting 290 votes opposing the Stalin candidacy. His actions resulted in Stalin's being re-elected as the General Secretary instead of Sergey Kirov. By the rules, the candidate receiving fewer opposing votes should become the General Secretary. Before Kaganovich's falsification, Stalin received 292 opposing votes and Kirov only three. However, the "official" result (due to the interference of Kaganovich) saw Stalin with just two opposing votes (Radzinsky, 1996).