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
General Secretary of the Communist Party of the Soviet Union Soviet republics. General Secretary of the Communist Party of the Soviet Union General Secretary of the Central Committee of the Communist Party of the Soviet Union was an office of the Communist Party of the Soviet Union (CPSU) that by the late 1920s had evolved into the most powerful of the Central Committee's various secretaries. With a few exceptions, from 1929 until the union's dissolution the holder of the office was the "de facto" leader of the Soviet Union, because the post controlled both the CPSU and the Soviet government. Joseph Stalin elevated the office to overall command of the