What was the Soviet Union?
The Soviet Union, officially the Union of Soviet Socialist Republics (U.S.S.R.), was a Eurasian state that existed from 1922 to 1991. It was the largest country in the world by area, encompassing 15 Soviet Socialist Republics, with Moscow as its capital. The majority of its population was composed of East Slavs, though over 100 distinct nationalities resided within its borders.
The Soviet Union was the successor to the Russian Empire and was established following the 1917 Revolution. Its political system was characterized by a highly centralized, authoritarian structure dominated by the Communist Party of the Soviet Union (CPSU). Economically, it operated under a command economy controlled by five-year plans.
Significant reforms of glasnost (openness) and perestroika (restructuring) in the late 1980s led to increased political and economic liberalization. However, these reforms, coupled with economic stagnation, ethnic nationalism, and the costly involvement in Afghanistan, contributed to the Soviet Union's eventual collapse on December 31, 1991. It was succeeded by 15 independent nations, with Russia assuming its permanent seat on the United Nations Security Council.