There are five reasons for the disintegration of the Soviet Union: the failure of CPSU in ideology and policy is the fundamental reason; The imperfect political system is an important reason for the disintegration of the Soviet Union. The failure of the state in the operation of the economic system is also an important reason for the disintegration of the Soviet Union. Wrong ethnic policy; And the peaceful evolution of the west.

1.The failure of CPSU in ideology and policy is the fundamental reason: the main reason for the tragedy of the disintegration of the Soviet Union is the failure of CPSU, which first began in the ideological field. In the later period of CPSU, some * * * connived at or directly advocated the diversification of guiding ideology, which led to ideological confusion within the party, economic decline, sharp social contradictions and ethnic divisions, and also opened the door for the infiltration of hostile forces and western ideas.

2. Imperfect political system is an important reason for the disintegration of the Soviet Union: the highly centralized political system of the Soviet Union has many factors that are not conducive to democracy and decision-making, and it has also become another important factor that eventually led to the disintegration of the Soviet Union.

3. The failure of the country in the operation of the economic system is also an important reason for the disintegration of the Soviet Union: during Gorbachev's period, the living standards and quality of the Soviet people were seriously backward compared with those of developed capitalist countries. Economic recession? Retreat became another accelerator for the disintegration of the Soviet Union. The fundamental reason for the economic decline of the Soviet Union lies in the rigid economic system of the Soviet Union. Structure and strategy can't adapt to the development and changes of the times.

4. Wrong ethnic policy: The Soviet Party and state have made a lot of efforts to solve ethnic problems, and have also made some achievements. However, due to the seriousness of ethnic issues left over from history and the complexity of ethnic relations, as well as a series of theoretical and practical mistakes in dealing with ethnic issues, ethnic issues have not been fundamentally resolved, which directly led to the eventual separation of the participating republics from the Soviet Union.

5. Peaceful evolution of the West: The strategy of peaceful evolution contributed to the drastic changes in the Soviet Union, but only when there was a political and social crisis and turmoil in the Soviet Union could external factors play a certain role.