| Summary/Abstract |
The pillars of the Pax Americana are decaying. There are two critical challenges. Our interests with our closest allies have been drifting apart for decades, with increasingly serious consequences. A new populist and economic nationalist coalition has been mobilized in the United States, challenging the internationalist coalition that has prevailed at home since the second World War. These challenges are not the product of President Donald J. Trump. He is the manifestation of these challenges, not their cause. Understanding these challenges requires examining anew the role of international legitimacy and authority in world politics and recognizing that different international orders have different distributional consequences. This essay summarizes my past research on the incentives for international hierarchy, integrates the role of domestic interests into that theory, and explores the nature and role of international legitimacy in the study of world order. Part II examines the Pax Americana, and contrasts this order with those found in the Caribbean basin and Middle East. The final section outlines the changing incentives for cooperation between the United States and Europe, discusses the rise of populism in the United States, and suggests ways of addressing the current challenges to internationalism.
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