The Soviet government was the political system of the Union of Soviet Socialist Republics (USSR), which existed from 1922 to 1991. It was based on the principles of Marxism-Leninism, emphasizing state control over the economy and society. The government was characterized by a single-party system led by the Communist Party, which held all political power and made decisions for the country. The structure of the Soviet government included various institutions, such as the Supreme Soviet, which served as the legislative body. Key leaders, like Joseph Stalin and Leonid Brezhnev, played significant roles in shaping policies and governance. The system aimed to create a classless society but often resulted in authoritarian rule and limited personal freedoms.