Sovereign Inequalities and Hierarchy in Anarchy: American Power and

How is unrivalled American power reshaping 21st-century international society? Is the United States an empire, in fact or in the making? This article attempts to elaborate the conceptual resources required to answer such questions. I focus on multiple forms of hierarchy in anarchy and diverse practices of sovereign inequality — concepts that most main-stream perspectives ignore, find paradoxical, or even dismiss as self-contradictory.2 After defining empire and hierarchy in anarchy, I present a typology of international orders tuned to thinking about empire and its alternatives. The central section of the article explores three classes of formal inequalities common during the Westphalian era — special rights of Great Powers, restricted rights for outlaws, and a wide range of particular practices of ‘semi-sovereignty’. I then sketch ten historically grounded models of hierarchical international relations. Two brief applications to contemporary American power seek to illustrate the value of this conceptual apparatus. Throughout, my focus is on appreciating the precise nature and considerable variety of international inequalities. I argue that the concepts of hierarchy in anarchy and sovereign inequality, but not empire, are essential for understanding the shape and develop-ment of contemporary international order. KEY WORDS ♦ anarchy ♦ empire ♦ hierarchy ♦ inequality ♦ semi-sovereignty ♦ sovereignty Concepts and a Typology Empire ‘Empire ’ derives from the Latin imperium. Originally the right of Roman magistrates to enforce the law, imperium came to mean legitimate authority