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
Premier of the Soviet Union USSR. However, Kosygin's prestige was weakened when he proposed the economic reform of 1965. Under the 1977 Soviet Constitution, the Premier of the Council of Ministers was the head of government of the USSR. The Premier was the chief of the executive branch and head of the Soviet government as a whole, the premiership was the most powerful governmental office in the USSR by influence and recognition until the establishment of the presidency during 1990. The Premier was responsible and accountable to the Supreme Soviet and during the period between sessions of the Supreme Soviet he was also accountable to