The Russian SFSR (Russian Soviet Federated Socialist Republic) (Russian: Росси́йская Сове́тская Федерати́вная Социалисти́ческая Респу́блика, РСФСР) was the largest and most populous of the fifteen former Soviet republics, and became the modern day Russia after the collapse of the Soviet Union.
The state was founded in 1918 by the 1918 Soviet Constitution. It was made into a part of the Soviet Union in 1922, an act later formalised by the 1924 Soviet Constitution. In English, the term Bolshevist Russia is commonly used for the period 1917–1922. In Russian official documents of the time it was referred to as Russian Republic (Российская республика) and Soviet Republic (Советская республика).
The country was run by the Chairman of the Presidium of the Supreme Soviet of the Russian SFSR (most recent title). Its capital was Moscow, also the capital of the Soviet Union.
Following the collapse of the Soviet Union in 1991, the RSFSR rejected a socialist system and went through reforms. It was renamed as the Russian Federation under the leadership of President Boris Yeltsin. The Commonwealth of Independent States (CIS), founded after the breakup of the USSR, loosely bound the former Soviet republics, except for Latvia, Lithuania and Estonia.
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