Gillian Brock is professor of philosophy at the University of Auckland. From 2013 to 2015 she was a fellow at the Edmond J. Safra Center for Ethics at Harvard University, where she researched institutional corruption. Her recent books include Global Justice: A Cosmopolitan Account (2009); the edited volume Cosmopolitanism versus Non-Cosmopolitanism (2013); and Debating Brain Drain: May Governments Restrict Emigration? (2015, with Michael Blake). Her current research interests include responsibilities for addressing corruption, issues of migration and justice, and how global justice theorizing can usefully translate into policy recommendations. g.brock@auckland.ac.nz

Anne Clunan is associate professor of national security affairs at the Naval Postgraduate School. Her interests include how states define and respond to emerging national security threats, international status and identity politics, emerging technologies, and the implications of globalization and nonstate actors for sovereignty and governance. She has authored The Social Construction of Russia's Resurgence (2009), and co-edited the volumes Ungoverned Spaces (2010) and Terrorism, War, or Disease? (2008). Her work has appeared in Communist and Post-Communist Studies, Political Science Quarterly, and Perspectives on Politics, among other journals. She earned her PhD in political science at the University of California, Berkeley. alclunan@nps.edu

Andrew Hurrell is Montague Burton Professor of International Relations at the University of Oxford and a fellow of Balliol College. He was elected to the Johns Hopkins Society of Scholars in 2010 and to the British Academy in 2011. His research interests cover theories of international relations, theories of global governance, the history of thought on international relations, comparative regionalism, and the international relations of the Americas, with particular reference to Brazil. His book On Global Order: Power, Values, and the Constitution of International Society was the winner of the International Studies Association's Annual Best Book Award in 2009. He is currently working on a history of the globalization of international society and the implications for twenty-first-century global order. andrew.hurrell@politics.ox.ac.uk

G. John Ikenberry is the Albert G. Milbank Professor of Politics and International Affairs at Princeton University in the Department of Politics and the Woodrow Wilson School of Public and International Affairs. He is also co-director of Princeton's Center for International Security Studies; a Global Eminence Scholar at Kyung Hee University in Seoul, South Korea; and a fellow of the American Academy of Arts and Sciences. From 2013 to 2014 he was the 72nd Eastman Visiting Professor at Balliol College, University of Oxford. gji3@princeton.edu

Deepa M. Ollapally is research professor of international affairs and director of the Rising Powers Initiative at the Elliott School of International Affairs, George Washington University, where she is currently leading a project on power and identity and the worldviews of aspiring powers in Asia. Her research focuses on domestic foreign-policy debates in India, U.S.-India relations, and maritime security in the Indian Ocean. She is the author or editor of numerous books, including Energy Debates in Asia and Eurasia (2017, with Mike Mochizuki); Worldviews of Aspiring Powers (2012, with Henry Nau); and The Politics of Extremism in South Asia (2008). She holds a PhD from Columbia University. deepao@gwu.edu

Ayelet Shachar is director at the Max Planck Institute for the Study of Religious and Ethnic Diversity and professor of law and political science at the University of Toronto. She earned her doctoral degree in law from Yale and has held distinguished visiting professorships at Stanford and Harvard. Her research focuses on citizenship theory, immigration policy, cultural diversity, and gender equality, and combines insights from law and political theory with innovative problem-solving and institutional design. She is the author of several books, including Multicultural Jurisdictions: Cultural Differences and Women's Rights (2001), The Birthright Lottery: Citizenship and Global Inequality (2009), and the forthcoming Olympic Citizenship: Migration and the Global Race for Talent. She is also the lead editor of The Oxford Handbook of Citizenship (2017). ayelet.shachar@utoronto.ca

Shiping Tang is Fudan Distinguished Professor and Dr. Seaker Chan Chair Professor at the School of International Relations and Public Affairs, Fudan University, Shanghai, China. He also holds a Changjiang Scholar Distinguished Professorship from the Chinese Ministry of Education. His research interests include international relations, comparative politics, institutional economics, philosophy of social sciences, and political theory. Widely published, his most recent book, The Social Evolution of International Politics (2013), received the International Studies Association's Annual Best Book Award in 2015. twukong@yahoo.com

Ole Wæver is professor of international relations and founder of the Centre for Advanced Security Theory at the University of Copenhagen, Denmark, where he also directs the Centre for Resolution of International Conflicts. He coined the concept of securitization and co-developed what is known as the Copenhagen School in security studies. He was elected to the Royal Danish Academy of Sciences and Letters in 2007, became Knight of the Order of the Dannebrog in 2014, and was the first recipient of the Hesbjerg Foundation Peace Prize in 2015. His books include International Relations Scholarship Around the World (2009, ed. with Arlene B. Tickner), Regions and Powers: The Structure of International Security (2003, with Barry Buzan), and Security: A New Framework for Analysis (1998, with Barry Buzan and Jaap de Wilde). ow@ifs.ku.dk