As Schwartz makes clear, the dissolution of a system that did not permit capitalist exploitation wasn't sufficient to satisfy Empire capitalists--they wanted total subservience. That, of course, is the nature of capitalists to compete forever for dominance over everything that provides them with profits and power: private ownership of economies, commodification of labor, control of markets, and exploitation of nature.
The dissolution of the Soviet Union and the introduction of the capitalist market created conditions for the social wealth created by generations of workers to be plundered by a handful of oligarchs and international finance. The social gains made in the field of education, health care, culture and infrastructure were smashed and left to decline.
This was not enough, however, for the US and the major European powers.