Sarah E. Kreps is an Assistant Professor of Government at Cornell University. She previously held fellowships at the Belfer Center for Science and International Affairs, Harvard University, and the Miller Center for Public Affairs, University of Virginia. Between 1999 and 2003, Kreps served as an active duty officer in the United States Air Force.

"When will countries seek allies for military intervention, and when will they go it alone? This is one of the most pressing security questions of today, and Coalitions of Convenience provides the best answer I've seen to date. Sarah Kreps' clear-eyed assessment of how the United States makes this decision evokes E.H. Carr in its supple analysis and graceful prose." --Daniel W. Drezner, Professor of International Politics, Tufts University, and author of All Politics is Global

"The striking variation in the United States' proclivity to act alone or in consort with other states has befuddled scholars and policymakers since the Cold War's end. In Coalitions of Convenience Sarah Kreps provides a rich and yet logically concise explanation, one that combines scholarly rigor with a feel for the realities of statecraft. This important book will shape the debate for years to come." --William C. Wohlforth, Professor of Government, Dartmouth College, and author of World Out of Balance

"This is an innovative study that adds a new dynamic to the field of international relations. it builds a bridge between scholarly approaches that tend to operate from either a realist/structural perspective or a liberal/normative approach... Coalitions of Convenience has a definite place in courses related to international conflict and intervention. It has the potential to transform the dated mindsets that see the world in black and white, neo-realist and liberal terms." --International Dialogue