This work offers a unique critique of the new economic and military imperialism of the United States and its allies in the 21st century. Inspired by the anti-globalization and anti-war movements, in which the author himself has played a role, this is also an accessible introduction to the huge changes in global politics since the dominance of the American Empire with the end of the Cold War. It covers the key areas of: the nature of the new imperialism; the economic power of the US; globalization and inequality; wars in the post Cold War era; oil and empire; and resisting the new imperialism.