The Soviet Union, was a socialist federation in Eurasia that existed from 1922 to 1991. Nominally a union of multiple national Soviet republics, its government and economy were highly centralized. The country was a one-party state, governed by the Communist Party with Moscow as its capital in its largest republic, the Russian Soviet Federative Socialist Republic (Russian SFSR). This book covers the history of Soviet Union from 1917 to 1991 when it got dissolved. This book is a compilation of high quality articles from the Internet.