Abstract:

In a sense, the violent change of the Soviet Union resulted from the loss of legitimacy of the Communist Party and its regime. The Cate resources, but in the process of socialist construction, the Soviet Union's Communisommunist ideology and ruling efficiency has been its important legitimt Party didn't foster its two legitimate bases, causing them disintegrated continuously and even leading to a legitimate crisis. When Gorbarchev tried to explore a new legitimate source through reform, he didn't strengthen the former legitimacy, but negated the former, thus leading to the violent change of the Soviet Union.

Key words: legitimacy, violent change of the Soviet Union, ideology, ruling efficiency