Sean M. Lynn-Jones is an International Security Program Associate and a member of the International Security Editorial Board. He is the former Editor of International Security, the International Security Program's quarterly journal and former series editor of the Belfer Center Studies in International Security, the Program's book series that is published by MIT Press. Sean previously served as Managing Editor of International Security (1987–1991) and was a fellow at the Center (1984–1987 and 1991–1992).

Sean's research interests include international relations theory, U.S. foreign policy, and why rivalries end peacefully. His articles have appeared in Foreign Policy, International Security, and Security Studies, as well as in many edited volumes. He has edited or co-edited several anthologies of International Security articles, including Do Democracies Win Their Wars? (2011); Contending with Terrorism: Roots, Strategies, and Responses (2010); Going Nuclear: Nuclear Proliferation and International Security in the 21st Century (2010); Primacy and Its Discontents: American Power and International Stability (2009); Offense, Defense, and War (2004); Theories of War and Peace (1998); America's Strategic Choices (1997); Nationalism and Ethnic Conflict (1997); East Asian Security (1996); Debating the Democratic Peace (1996); The Perils of Anarchy: Contemporary Realism and International Security (1995); Global Dangers: Changing Dimensions of International Security (1995); The Cold War and After (1991; expanded edition 1993); and Military Strategy and the Origins of the First World War (1991).

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