Imperialism as we knew it may be no more, but Empire is alive and well. It is, as Michael Hardt and Antonio Negri demonstrate in this bold work, the new political order of globalization. It is easy to recognize the contemporary economic, cultural, and legal transformations taking place across the globe but difficult to understand them. Hardt and Negri contend that they should be seen in line with our historical understanding of Empire as a universal order that accepts no boundaries or limits. Their book shows how this emerging Empire is fundamentally different from the imperialism of European dominance and capitalist expansion in previous eras. Rather, today’s Empire draws on elements of U.S. constitutionalism, with its tradition of hybrid identities and expanding frontiers.