I have spent most of my career working at the intersetion of academia and public policy. After a first teaching job at Princeton, I opted for a stint in the government, working on the National Security Council during the first Clinton administration. Since the mid-1990s, I have been a professor at Georgetown University and a senior fellow at the council on Foreign Relations. I have also served as a visiting scholar at Harvard University's Center for International Affairs, Columbia University's Institute for War and Peace Studies, the International Institute for Strategic Studies in London, the Centre d'Etude et de Recherches Internationales in Paris, and the Imstitute for International Policy Studies in Tokyo.


B.A. (1981) East Asian Studies, Harvard University
M. Phil. (1983) Politics, Oxford University
D. Phil. (1985) Oxford University


Balkan Region,European Union,Homeland Security,NATO,U.S. Foreign Policy


Director for European Affairs, National Security Council, 1993-1994
Assistant Professor of Politics, Princeton University, 1987-1992


Transatlantic relations; European Union and NATO; Balkans, U.S. foreign policy; U.S. national security

Project Summary

The project examines instances in which nations become lasting friends -- when and how sovereign states are able to escape geopolitical competition and build zones of stable peace within which the prospect of war becomes unthinkable. The historical cases include instances of rapprochement, security community, and union. Although scholars and policymakers are well aware that such zones of peace exist -- the Atlantic community and the European Union are contemporary examples -- there is scant understanding of how these uniquely peaceful groupings of states come about and persist.

Major Publications

  • The End of the American Era: U.S. Foreign Policy and the Geopolitics of the Twenty-first Century (New York: Knopf, 2002)
  • Nationalism and Nationalities in the New Europe (Ithica: Cornell University Press, 1995)
  • The Vulnerability of Empire (Ithica: Cornell University Press, 1994)
  • Power in Transition: The Peaceful Change of International Order (2001)
  • Civic Engagement in the Atlantic Community (1999)
  • Atlantic Security: Contending Visions (1998)
  • The Persian Gulf and the West (1987)