Rosa Brooks is a professor of law at Georgetown University, a Fellow at the New America Foundation, and a weekly columnist for Foreign Policy magazine. From 2009 to 2011, Brooks served as Counselor to the U.S. Under-Secretary of Defense for Policy. From 2001 to 2006 she was an associate professor of law at the University of Virginia, and from 2005 to 2009 she wrote a weekly op-ed column for the Los Angeles Times. Brooks is the author (with Jane Stromseth and David Wippman) of Can Might Make Rights? Building the Rule of Law after Military Interventions (2006). Her next book, By Other Means: How Everything Became War and the Military Became Everything, will appear in 2015. rosa.brooks@law.georgetown.edu

Michael W. Doyle is Director of the Columbia Global Policy Initiative and the Harold Brown Professor of International Affairs, Law, and Political Science at Columbia University. His current research focuses on international law and international relations. Among his publications are Empires (1986); Ways of War and Peace: Realism, Liberalism, and Socialism (1997); Making War and Peace: United Nations Peace Operations (with Nicholas Sambanis, 2006); Striking First: Preemption and Prevention in International Conflict (edited by Stephen Macedo, 2011); and The Question of Intervention: J. S. Mill and the Responsibility to Protect (forthcoming 2014). Doyle served as Assistant Secretary-General for Policy Planning and Special Adviser to UN Secretary-General Kofi Annan, where his responsibilities included strategic planning (the Millennium Development Goals), outreach to the international corporate sector (the Global Compact), and relations with Washington, DC. He also chaired the UN Democracy Fund through 2103. Doyle is a Trustee of the Carnegie Council for Ethics in International Affairs. md2221@columbia.edu

David Dyzenhaus is a professor of law and philosophy at the University of Toronto. He is the author of Hard Cases in Wicked Legal Systems: South African Law in the Perspective of Legal Philosophy (1991, second edition as Hard Cases in Wicked Legal Systems: Pathologies of Legality, 2010); The Constitution of Law: Legality in a Time of Emergency (2006); Judging the Judges, Judging Ourselves: Truth, Reconciliation and the Apartheid Legal Order (1998); and Legality and Legitimacy: Carl Schmitt, Hans Kelsen, and Hermann Heller in Weimar (1997). david.dyzenhaus@utoronto.ca

Toni Erskine is a professor of international and political studies and Acting Director of the Australian Centre for Cyber Security at the University of New South Wales (UNSW). She is also Senior Research Associate at Aberystwyth University, where she was a professor of international politics until 2013. From 2014 she is on both the Executive Committee and the Governing Council of the International Studies Association. Her books include Embedded Cosmopolitanism: Duties to Strangers and Enemies in a World of “Dislocated Communities” (2008), and, as editor, Tragedy and International Relations (2012) with Richard Ned Lebow. Her current book project, Locating Responsibility: Institutional Moral Agency and International Relations, is in preparation. T.Erskine@adfa.edu.au

Ian Hurd, associate professor of political science at Northwestern University, has written extensively about the politics of international law and international institutions. His work has appeared in leading academic and public policy journals, including International Organization, Foreign Affairs, International Politics, Global Governance, and Ethics & International Affairs. His book on the UN Security Council, After Anarchy: Legitimacy and Power in the UN Security Council (2007), won the Chadwick Alger Award from the International Studies Association and the Myres McDougal Prize from the Policy Sciences Society. His most recent book is International Organizations: Politics, Law, Practice, which appeared in a second edition in 2014. Hurd has been a visiting scholar at the Woodrow Wilson School at Princeton University, Sciences-Po in Paris, and the WZB Berlin Social Science Center, among other institutions, and is a frequent contributor to public debates on global affairs, foreign policy, and international law. His current work includes a book on the international rule of law, and he is a co-editor of the forthcoming Oxford Handbook of International Organizations. ianhurd@northwestern.edu

George R. Lucas, Jr., recently retired from the Distinguished Chair in Ethics in the Vice Admiral James B. Stockdale Center for Ethical Leadership at the U.S. Naval Academy, is currently a professor of ethics and public policy at the Graduate School of Public Policy at the Naval Postgraduate School in Monterey, California. He has taught at Georgetown University, Emory University, Randolph-Macon College, the French Military Academy (Saint-Cyr), and the Catholic University of Leuven in Belgium. His main areas of interest are applied moral philosophy and military ethics, and he has written on such topics as irregular and hybrid warfare, cyber conflict, military and professional ethics, and ethical challenges of emerging military technologies. His most recent book is Anthropologists in Arms: The Ethics of Military Anthropology (2009), and he has a commissioned work on military ethics in preparation for Oxford University Press, and is currently editing The Routledge Handbook on Military Ethics for publication in 2015. grlucas@nps.edu

Amartya Sen is the Thomas W. Lamont University Professor and a professor of economics and philosophy at Harvard University, and was until recently the Master of Trinity College, Cambridge University. Previously, he was the Drummond Professor of Political Economy at Oxford University, and a Fellow of All Souls College (now a Distinguished Fellow of All Souls). Prior, he was Professor of Economics at Delhi University and at the London School of Economics. He studied at Santiniketan and at Presidency College in Calcutta, and at Trinity College, Cambridge. Amartya Sen has served as President of the Econometric Society, the Indian Economic Association, the American Economic Association, and the International Economic Association. He was formerly Honorary President of OXFAM and is now its Honorary Advisor. He is a Trustee of the British Museum and of the Nuclear Treaty Initiative. His books on economics, philosophy, and related areas have been translated into more than thirty languages. His research has ranged over a number of fields in economics, philosophy, and decision theory, including social choice theory, welfare economics, theory of measurement, development economics, public health, gender studies, moral and political philosophy, and the economics of peace and war. Among his many awards are honorary doctorates from universities worldwide; the “Bharat Ratna” (India's highest civilian award); the Senator Giovanni Agnelli International Prize in Ethics; the Edinburgh Medal; the Brazilian Ordem do Merito Cientifico (Gra-Cruz); the Presidency of the Italian Republic Medal; the Eisenhower Medal; Honorary Companion of Honour (U.K.); the 2011 National Humanities Medal Award, presented by President Obama; the George E. Marshall Award; and the Nobel Prize in Economics. asen@fas.harvard.edu

Christian Reus-Smit is a Fellow of the Academy of the Social Sciences in Australia and professor of international relations at the University of Queensland. Among his books are Individual Rights and the Making of the International System (2013); American Power and World Order (2004); The Moral Purpose of the State (1999); and (as co-author) Special Responsibilities: Global Problems and American Power (2012). Rues-Smit is editor of The Politics of International Law (2004) and co-editor of The Oxford Handbook of International Relations (2008). c.reussmit@uq.edu.au

Joseph E. Stiglitz is University Professor at Columbia University, the winner of the 2001 Nobel Prize in Economics, and a lead author of the 1995 Intergovernmental Panel on Climate Change report, which shared the 2007 Nobel Peace Prize. He was chairman of the U.S. Council of Economic Advisors under President Clinton and chief economist and senior vice president of the World Bank for 1997–2000. Stiglitz received the John Bates Clark Medal, awarded biennially to the American economist under forty who has made the most significant contribution to the subject. He was a Fulbright Scholar at Cambridge University, held the Drummond Professorship at All Souls College, Oxford, and has taught at MIT, Yale, Stanford, and Princeton. jes322@columbia.edu

Ruti Teitel is the Ernst C. Stiefel Professor of Comparative Law, New York Law School; Visiting Fellow, London School of Economics; and an affiliated visiting professor at Hebrew University of Jerusalem. She is the author of Transitional Justice (2000) and many articles and book chapters on international and comparative law, often focusing on political transitions. Her latest work is Humanity's Law (2012), which aims to set out a paradigm shift in international affairs. She is the founding co-chair of the American Society of International Law Interest Group on Transitional Justice and Rule of Law, a life member of the Council on Foreign Relations, and a member of the ILA International Human Rights Law Committee. For 2012–2013, Teitel was a Straus Fellow-in-Residence at New York University Law School's Straus Institute for the Advanced Study of Law and Justice. rteitel@nyls.edu