Why did the Soviet Union disintegrate?

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Tags

1. #including
2. #political
3. #revive
4. #disbanded
5. #events
6. #economy
7. #intention
8. #problems
9. #union
10. #disintegration
11. #berlin
12. #identified
13. #economic
14. #declared
15. #started
16. #gorbachev
17. #reforms
18. #series
19. #soviet