General Secretary of the Communist Party of the Soviet Union 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
Censorship of images in the Soviet Union was also among the first members of the Politburo. He became an enemy of the State and was erased from Soviet history after leading the failed struggle of the Left Opposition against the policies and rise of Joseph Stalin in the 1920s and the increasing bureaucratization of the Soviet Union. Trotsky was expelled from the Communist Party and deported from the Soviet Union in the Great Purge. As the head of the Fourth International, he continued in exile to oppose the Stalinist bureaucracy in the Soviet Union, and was eventually assassinated in Mexico by Ramón Mercader, a Soviet agent who