The title refers to the Anglo-American Empire enforced ultimately by NATO that has been imposed on the rest of the world. I refuse to quibble over some of his observations (for example, he suggests that the Soviet Union was an Empire) because his overall thesis is right on target.
The present capitalist model (the only one available) for a rising power, whether China, India, or Brazil, is also a model for planetary decline, possibly of a precipitous nature.