What happened to the Soviet Union happened mainly for domestic reasons. It was a failure of the model based on a command economy and dictatorship. The rejection of freedom and democracy, the decisionmaking monopoly of one party, and the monopoly of one ideology all had a chilling effect on the country. That model turned out to be incapable of making structural changes. It did not open up ways for initiative and was overly centralized.
Mikhail GorbachevNew approaches are needed, new orientations in both thought and action. We must make the transition to a new civilization...We are talking of a transition toward a new civilization. No one knows what it will be like. What is important is to orient in that direction... I am convinced that a new civilization will inevitably take on certain features that are characteristic of, or inherent in, the socialist ideal.
Mikhail GorbachevWhen I cleared out Moscow apartment after stepping down as president, they found all kinds of wiring in the walls. It turned out that they had been spying on me all along.
Mikhail Gorbachev