Communist Party of the Soviet Union along with the institution of free multiparty elections led to a decline in the party's power, and after the dissolution of the Soviet Union, the banning of the party by later last RSFSR President Boris Yeltsin and subsequent first President of an evolving democratic and free market economy of the successor Russian Federation. A number of causes contributed to CPSU's loss of control and the dissolution of the Soviet Union during the early 1990s. Some historians have written that Gorbachev's policy of "glasnost" (political openness) was the root cause, noting that it weakened the party's control over society. Gorbachev maintained
Congress of People's Deputies of the Soviet Union Soviet Union. Frustrated by the 'old guard's resistance to his attempts to liberalise, Gorbachev changed tack and embarked upon a set of constitutional changes to try and separate party and state, and thereby isolate his conservative opponents. Detailed proposals for the new Congress of People's Deputies of the Soviet Union were published for public consultation on 2 October 1988, and to enable the creation of the new legislature the Supreme Soviet, during its 29 November to 1 December 1988 session, implemented the amendments to the 1977 Soviet Constitution, enacted a law on electoral reform, and set the date of the