Amitav Acharya is Distinguished Professor of international relations at American University, Washington, D.C. He has taught at York University, the University of Bristol, and Nanyang Technological University, and held visiting appointments at Rhodes University, University of Oxford, and Harvard University. His books include Agency and Change in World Politics: Constructing Global Order (forthcoming); Rethinking Power, Institutions and Ideas in World Politics (2014); The End of American World Order (2014); and Whose Ideas Matter? Agency and Power in Asian Regionalism (2009). He is also editor of Why Govern? Rethinking Demand and Progress in Global Governance (2016). His articles have appeared in International Organization, International Security, International Studies Quarterly, World Politics, and The National Interest, and he frequently writes op-eds for the Washington Post (Monkey Cage), the Financial Times, and Foreign Affairs Today. aacharya@american.edu

Chris Brown is Emeritus Professor of international relations at the London School of Economics and Political Science. He has written numerous articles in international political theory as well as several books, including International Society, Global Polity (2015); Practical Judgement in International Political Theory: Selected Essays (2010); Sovereignty, Rights and Justice (2002); and International Relations Theory: New Normative Approaches (1992). He is also editor of Political Restructuring in Europe: Ethical Perspectives (1994) and co-editor (with Terry Nardin and N. J. Rengger) of International Relations in Political Thought: Texts from the Ancient Greeks to the First World War (2002) and (with Robyn Eckersley) of The Oxford Handbook of International Political Theory (forthcoming, 2018). His textbook, Understanding International Relations (2009), is now in its fourth edition and has been translated into Arabic, Chinese, Portuguese, and Turkish. c.j.brown@lse.ac.uk

Jamie Gaskarth is senior lecturer and deputy head of the Department of Political Science and International Studies at the University of Birmingham. He is the editor of China, India and the Future of International Society (2015) and Rising Powers, Global Governance and Global Ethics (2015). He has published widely on foreign policy, international society, and global ethics in, among other journals, the European Journal of International Relations, International Affairs, the Review of International Studies, Foreign Policy Analysis, and the Journal of European Public Policy. j.b.gaskarth@bham.ac.uk

Laura M. Hartman is assistant professor of environmental studies at the University of Wisconsin Oshkosh. Her background is in Christian environmental ethics, and her interests include consumption, transportation, climate engineering, narrative, virtue, and feminist ethics. She is the author of The Christian Consumer: Living Faithfully in a Fragile World (2011) and is currently editing a volume entitled Flourishing: Comparative Religious Environmental Ethics (forthcoming). hartmanl@uwosh.edu

Aidan Hehir is reader in international relations at the University of Westminster. He earned his PhD in 2005 and has previously worked at the University of Limerick and the University of Sheffield. His research focuses on the Responsibility to Protect and post-conflict reconstruction in Kosovo. His books include International Law, Security and Ethics (2014, co-editor); Libya, the Responsibility to Protect, and the Future of Humanitarian Intervention (2013, co-editor); Humanitarian Intervention: An Introduction, 2nd Edition (2013); and The Responsibility to Protect: Rhetoric, Reality and the Future of Humanitarian Intervention (2012). a.hehir@westminster.ac.uk

James Turner Johnson is Distinguished Professor Emeritus in the Department of Religion at Rutgers University. He has written eleven books dealing with Western moral and legal traditions on war and has edited or coedited three others. His most recent books are Sovereignty: Moral and Historical Perspectives (2014) and The Ashgate Research Companion to Military Ethics (edited with Eric Patterson, 2015). jtj@rci.rutgers.edu

Amartya Sen is Thomas W. Lamont University Professor and a professor of economics and philosophy at Harvard University, and was until 2004 the Master of Trinity College, Cambridge. Previously, he was the Drummond Professor of Political Economy at Oxford University, and a Fellow of All Souls College. Prior to that, he was Professor of Economics at Delhi University and at the London School of Economics. 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, jurisprudence, and moral, political, and legal philosophy. Prof. Sen has served as President of the Econometric Society, the American Economic Association, the Indian 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. Among his many awards are honorary doctorates from universities worldwide; the “Bharat Ratna” (India's highest civilian award); the Commandeur de la Légion d'Honneur (France); the National Humanities Medal (U.S.); the Ordem do Mérito Científico: Grã-Cruz (Brazil); the Aztec Eagle (Mexico); the Honorary Companion of Honour (U.K.); the George E. Marshall Award (U.S.); the Senator Giovanni Agnelli International Prize in Ethics (Italy); the Edinburgh Medal (U.K.); the Eisenhower Medal (U.S.); and the Nobel Prize in Economics. asen@fas.harvard.edu