The Soviet Union (short for the Union of Soviet Socialist Republics or USSR) was a single-party Marxist–Leninist state. It existed for 68 years, from 1922 until 1991, a few days before its 69th anniversary. It was the first country to declare itself socialist and build towards a communist society. It was a union of 14 Soviet socialist republics and one Soviet Federative Socialist Republic (Russian SFSR).
The Soviet Union was created about five years after the Russian Revolution. It was announced after Vladimir Lenin overthrew Alexander Kerensky as Russian leader. The communist government developed industry and over time became a major, powerful union. The largest country in the Union was Russia, Kazakhstan was the second, and Ukraine the third largest. The capital city of the Soviet Union was Moscow. The Soviet Union expanded its political control greatly after World War II. It took over the whole of Eastern Europe. Those countries were not made part of the Soviet Union, but they were controlled by the Soviet Union indirectly. These countries, like Poland, Czechoslovakia, Hungary Bulgaria, Romania and East Germany, were called satellite states.
The top-level committee which made the laws was the Supreme Soviet of the Soviet Union. In practice, the General Secretary of the Communist Party of the Soviet Union was the leader and most important decision-maker in their system of government.
Although the constitution said the Republics could leave the Union if they wanted, it was a completely centralized government, with no states' rights for the member countries.
The Union was formed with the idea to give everyone equal social and economic rights (equality). There was virtually no private property—everything belonged to the state (public property was an idea discussed by Karl Marx, and formed the basis for socialism) 'Soviets', or workers' councils, were created by the working class to lead the socialist state democratically, but they soon lost power with the rise of Stalinism. The Union was successful in many fields, putting the first man, first woman, and first satellite into space, defeating Hitler's Nazi Germany and winning World War II, together with the United States and United Kingdom, helping build infrastructure, as well as schools and hospitals in many third-world countries. However, its centralized government found innovation and change difficult to handle. The Union collapsed in 1991, partly due to the efforts at reform by its leader, Mikhail Gorbachev.


