Christian Barry is Senior Research Fellow in the School of Philosophy at the Research School of Social Sciences, Australian National University. He works on moral and political theory, with a particular emphasis on questions of international justice. He is the author (with Sanjay Reddy) of International Trade and Labor Standards: A Proposal for Linkage (2008), and his articles have appeared in Philosophy & Public Affairs; Journal of Political Philosophy; Philosophy, Politics & Economics; and Review of International Studies, among other journals. He is currently working on a book about the distinction between doing and allowing harm. christian.barry@anu.edu.au

Alex J. Bellamy is Professor of Peace and Conflict Studies at the University of Queensland. His books include Kosovo and International Society (2002), Security Communities and Their Neighbours: Regional Fortresses or Global Integrators? (2004), Understanding Peacekeeping (edited with Paul D. Williams and Stuart Griffin, 2004), International Society and Its Critics (editor, 2004), Just Wars: From Cicero to Iraq (2006), Fighting Terror: Ethical Dilemmas (2008), and Responsibility to Protect (2009). He serves on the editorial board of Ethics & International Affairs. a.bellamy@griffith.edu.au

Megan Braun is a Rhodes Scholar pursuing a master's in Philosophy in International Relations at Oxford University, where her research focuses on the interaction between technology, law, and the just war tradition. braun.meg@gmail.com

Daniel Brunstetter is Assistant Professor in the Department of Political Science at the University of California, Irvine. He has published on the just war tradition and modern political philosophy in Political Studies, International Relations, Review of Politics, and elsewhere. He is also codirector of UC Irvine's Program in Conflict Analysis and Resolution. dbrunste@uci.edu

Simon Chesterman is Vice Dean and Professor of Law at the National University of Singapore and Global Professor and Director of the New York University School of Law Singapore Programme. Educated in Melbourne, Beijing, Amsterdam, and Oxford, his books include Law and Practice of the United Nations (with Thomas M. Franck and David M. Malone, 2008) and One Nation Under Surveillance: A New Social Contract to Defend Freedom Without Sacrificing Liberty (2011). chesterman@nus.edu.sg

Joy Gordon is Professor of Philosophy at Fairfield University. She has written on ethical aspects of economic sanctions, as well as on issues in international law and international governance. Her articles have appeared in many publications, including Le Monde diplomatique, Global Governance, Yale Human Rights and Development Law Journal, Harper's and the Atlantic. She is the author of Invisible War: The United States and the Iraq Sanctions (2010). Her work is available at www.invisiblewar.net. JGordon@fairfield.edu

Ian Hurd is Associate Professor of Political Science at Northwestern University, and in 2010–2011 he was a Fellow at the Niehaus Center for Globalization and Governance at the Woodrow Wilson School at Princeton University. He is the author of many works on international organizations, international relations, and international law, including the books After Anarchy: Legitimacy and Power in the United Nations Security Council (2007) and International Organizations: Politics, Law, Practice (2011). His articles have appeared in International Organization, Foreign Affairs, Global Governance, and other journals. ianhurd@northwestern.edu

James Pattison is Lecturer in Politics at the University of Manchester. Prior to that he was Senior Lecturer in International Relations at the University of the West of England, Bristol. His research interests include humanitarian intervention, the responsibility to protect, the ethics of war, and the increased use of private military and security companies. His book, Humanitarian Intervention and the Responsibility to Protect: Who Should Intervene?, was awarded a Notable Book Award in 2011 by the International Studies Association (International Ethics Section). He has published various articles on the ethics of force, including for Ethics & International Affairs, International Theory, Journal of International Political Theory, Journal of Military Ethics, International Journal of Human Rights, and Journal of Political Philosophy. He is currently working on a second monograph, provisionally entitled The Morality of Private War. james.pattison@manchester.ac.uk

David Rodin is Director of Research at the Uehiro Centre for Practical Ethics at Oxford University. A former Rhodes Scholar from New Zealand, he holds a B.Phil. and doctorate in philosophy from Oxford University. His research covers a broad range of issues in moral and political philosophy, with particular emphasis on applied and public policy issues. He has worked on just war theory and the ethics of international conflict, business ethics, and bioethics. Rodin's first book, War and Self-Defense (2002), was awarded the American Philosophical Association Frank Chapman Sharp Prize for the best monograph on the philosophy of war and peace. david.rodin@politics.ox.ca.uk

Nicholas Southwood is Junior Research Fellow at Jesus College, Oxford, and Assistant Professor in the School of Philosophy at the Research School of Social Sciences, Australian National University. He works mainly in moral and political philosophy, with a special focus on practical reason and normativity. He is the author of Contractualism & the Foundations of Morality, and articles in Ethics, Nous, Philosophical Studies, and elsewhere. nicholas.southwood@jesus.ox.ac.uk

Thomas G. Weiss is Presidential Professor of Political Science at the CUNY Graduate Center and Director of the Ralph Bunche Institute for International Studies. Past President of the International Studies Association (2009–2010) and Past Chair of the Academic Council on the UN System (2006–2009), he was the research director for the International Commission on Intervention and State Sovereignty. His latest single-authored books are Humanitarian Intervention: Ideas in Action (2007), What's Wrong with the United Nations and How to Fix It (2009), and Thinking about Global Governance: Why People and Ideas Matter (2011). TWeiss@gc.cuny.edu

Jennifer Welsh is Professor of International Relations and Fellow of Somerville College at the University of Oxford. She is the author of At Home in the World: Canada's Global Vision for the 21st Century (2004), Edmund Burke & International Relations (1995), and a forthcoming book on sovereignty as responsibility. Her edited volumes include Humanitarian Intervention and International Relations (2004) and The United Nations Security Council and War: The Evolution of Thought and Practice since 1945 (with Vaughan Lowe, Adam Roberts, and Dominik Zaum, 2008). In 2006, Professor Welsh was named a Trudeau Fellow, and currently codirects (with David Rodin) the Oxford Institute for Ethics, Law, and Armed Conflict. jennifer.welsh@some.ox.ac.uk