The Supreme Soviet of the Union of Soviet Socialist Republics (SSUSSR) was the highest organ of state authority of the Soviet Union from 1936 to 1991. Based on the principle of unified power, it was the only branch of government in the Soviet state, and headed the unified state apparatus. Prior to 1936, the Congress of Soviets was the highest organ of state authority. During 1989–1991 a similar, but not identical organ acted as the highest organ of state authority. The Supreme Soviet appointed the Council of Ministers, the Supreme Court, and the Procurator General of the Soviet Union as well as elected the Presidium which served as the Soviet Union's collective head of state under both the 1936 and 1977 Soviet Constitutions. By the Soviet constitutions of 1936 and 1977, the Supreme Soviet was defined as the highest organ of state power in the Soviet Union and was imbued with great lawmaking powers. In practice, however, it was a rubber stamp parliament which did little more than ratify decisions already made by the Soviet Union's executive organs and the Communist Party of the Soviet Union (CPSU) – always by unanimous consent – and listen to the General Secretary's speeches. This was in accordance with the Stalinist CPSU's principle of democratic centralism and became the norm for other Communist legislatures. Source: Wikipedia (en)