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
Communist Party of the Soviet Union Bukharin, in 1938, Stalin said that a world revolution was impossible and that Engels was wrong on the matter. At the 18th Congress, Stalin took the theory to its inevitable conclusion, saying that the communist mode of production could be conceived in one country. He rationalized this by saying that the state could exist in a communist society as long as the Soviet Union was encircled by capitalism. However, with the establishment of socialist regimes in Eastern Europe, Stalin said that socialism in one country was only possible in a large country like the Soviet Union and that to survive,