I am a Lecturer (assistant professor) in international relations at the University of Cambridge and a fellow of Clare Hall.  My principal research interests are in international security studies, US foreign policy, multilateralism, and just war.

My monograph, Reassuring the Reluctant Warriors: US Civil-Military Relations and Multilateral Intervention, was published in 2015 in the Cornell Studies in Security Affairs book series. The book develops a new explanation of when and why the United States seeks multilateral approval through the United Nations or NATO for planned military interventions. Drawing on declassified documents and about 100 interviews that I conducted with senior US officials, I argue that America's top-ranking generals and admirals – as reluctant warriors who value international burden sharing and the potential exit ramp that a handoff to the UN or NATO can provide – play an underappreciated role in steering US intervention policy toward these multilateral bodies. 

I have further published two books on classical international relations theory: Just and Unjust Military Intervention: European Thinkers from Vitoria to Mill (co-edited with Jennifer Welsh; Cambridge UP 2013), and A Cosmopolitanism of Nations: Giuseppe Mazzini’s Writings on Democracy, Nation Building, and International Relations (co-edited with Nadia Urbinati; Princeton UP 2009). My research has also appeared in a variety of peer-reviewed journals, including Security Studies, the Review of International Studies, Political Science Quarterly, and Ethics & International Affairs

I hold a PhD from Columbia University (awarded with distinction) and a Master's degree from the London School of Economics and Political Science. I have held fellowships at Harvard's Kennedy School of Government, the Brookings Institution, the European University Institute (EUI), and the Free University of Berlin.

My name is pronounced as /stɛ́fəno /rɛ́kiə/