Introduction /G. John Ikenberry -- Part I. Durability of unipolarity -- Structural realism after the Cold War / Kenneth N. Waltz -- Hollow hegemony or stable multipolarity? / Charles A. Kupchan -- U.S. strategy in a unipolar world / William C. Wohlforth -- Part II. Management of unipolarity -- Keeping the world "off balance" : self restraint and U.S. foreign policy / Stephen M. Walt -- Defying history and theory : the United States as the "last remaining superpower" / Josef Joffe -- Incomplete hegemony and security order in the Asia-Pacific / Michael Mastanduno -- Part III. Institutions and ideology of unipolarity -- Democracy, institutions, and American restraint / G. John Ikenberry -- Transnational liberalism and American primacy, or, Benignity is in the eye of the beholder / John M. Owen IV -- U.S. power in a liberal security community / Thomas Risse -- American unipolarity : the sources of persistence and decline / G. John Ikenberry.