What happened to the Soviet Union happened mainly for...

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.