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
Anatoly Chernyaev the Soviet Union. He became General Secretary Gorbachev's foreign-policy advisor in 1986 and continued to advise Gorbachev when the latter became President of the Soviet Union. In 2004, Chernyaev donated his diaries from the Gorbachev period to the National Security Archive at George Washington University, which has published portions of them in English translation; according to the editor, "One can confidently say that every bold foreign policy initiative advanced by Gorbachev in the years 1985-1991 bears Chernyaev's mark on it." Since then, the National Security Archive has made available Chernyaev's diaries from 1972 to 1978 with an English translation of