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
20th Congress of the Communist Party of the Soviet Union 20th Congress of the Communist Party of the Soviet Union The 20th Congress of the Communist Party of the Soviet Union was held during the period 14–25 February 1956. It is known especially for First Secretary Nikita Khrushchev's "Secret Speech", which denounced the personality cult and dictatorship of Joseph Stalin. Delegates at this Congress of the Communist Party of the Soviet Union were given no advance warning of what to expect. Indeed, proceedings were opened by First Secretary Khruschev's call for all to stand in memory of the Communist leaders who had died since the previous Congress, in which he