The Decline of the American Empire by Gabriel Kolko

The dilemma the US has had for a half-century is that the priorities it must impose on its budget and its imperial plans have never guided its actual behavior and action. It has always believed, as well it should, that Europe and its control would determine the future of world power. But it has fought in Korea, Vietnam, and now Iraq – the so-called "Third World" in general – where the stakes of power were much smaller.