B.A, Harvard, 1970; Ph.D. 1977. Atherton Prize fellow and Resident Tutor in Government in Leverett House, Harvard, 1971-75. Lecturer in International Studies, University of Warwick (UK), 1975-76. Assistant professor of Public and International Affairs, Woodrow Wilson School, Princeton, 1977-84. Member of the Institute for Advanced Study, Princeton, 1982-83. Assistant and then associate professor of political science, Johns Hopkins University, 1984-87. Associate professor, professor and then Edwards S. Sanford Professor of Politics and International Affairs, Princeton, 1987-2003. Vice president of the International Peace Academy, New York, 1993-94. Director of the Center of International Studies, Princeton, 1997-2001. Chairman of the Committee of Editors, World Politics, 1997-2001. Chairman of the Committee of Editors, World Politics, 1997-2001.  Fellow of the Center for Advanced Study in the Behavioral Sciences, Stanford, 2000-01. Assistant secretary-general and special adviser to United Nations Secretary-General Kofi Annan, 2001-2003. Fellow of the American Academy of Arts and Sciences.

Principal areas of publishing and teaching: international relations theory, international security, and international organizations.