Michael Blake is professor of philosophy, public policy, and governance at the University of Washington. He is the author of Justice, Migration, & Mercy (2019) and is currently writing a book on the political aspects of the concept of meaning in life. miblake@uw.edu

François Boucher is a teaching fellow at the University of Québec at Trois-Rivières and an ethics advisor for the Science and Technology Ethics Commission of the Government of Québec. Most of his work explores different topics related to liberal theories of justice and the accommodation of ethnocultural diversity. He has published in such journals as Metaphilosophy, Raisons Politiques, Ethnicities, Studies in Philosophy and Education, Criminal Law and Philosophy, Revue Philosophique de Louvain, Interventions, and Comparative Migration Studies, among others. f.boucher2014@gmail.com

Eszter Kollar is associate professor of philosophy at the Institute of Philosophy at Catholic University (KU) Leuven, where she is co-directing the Justice and Migration research group. Her recently published work focuses on circumscribing the state's right to exclude and duty to include migrants (Journal of Moral Philosophy), prospect fairness for a European Social Union (European Journal of Philosophy), and reconciling people's right to self-determination with the principle of global equality of opportunity (Review of International Studies). eszter.kollar@kuleuven.be

Tony Milligan is a research fellow in the philosophy of ethics with the Cosmological Visionaries project at King's College London. His research focuses upon the ethics of space exploration and upon the importance of love within our human experience of time. He is the author of Nobody Owns the Moon: The Ethics of Space Exploitation (2015); co-editor of the standard collection of essays on the topic, The Ethics of Space Exploration (2016); and co-editor of the SpringerBrief Astrobiology and Society in Europe Today (2018). He is currently working on a SpringerBrief called “Cosmological Visions of the Pleiades”; and, with Koji Tachibana, on “What Is Space Exploration For?,” which is due to appear in a new Bristol University Press series on policy. anthony.milligan@kcl.ac.uk

Valeria Ottonelli is professor of political philosophy in the Department of Antiquities, Philosophy and History at the University of Genoa. Her main research interests focus on the normative theory of democratic institutions and participation and on the theory of just migration policies. She is author, with Tiziana Torresi, of The Right Not to Stay: Justice in Migration, the Liberal Democratic State, and the Case of Temporary Migration Projects (2022). vottonel@nous.unige.it

Nathan Pippenger is assistant professor of political science at the U.S. Naval Academy. He is a political theorist with interests in democracy, citizenship, and nationalism, especially in the context of American politics. His research has appeared in such venues as The American Journal of Political Science, The Journal of Politics, Political Research Quarterly, and The Review of Politics. He is currently writing a book about rival conceptions of nationhood and democracy in the United States. pippenge@usna.edu

Mitt Regan is McDevitt Professor of Jurisprudence, co-director of the Center on National Security at the Georgetown University Law Center, and faculty coordinator for the Atrocity Crimes Advisory Group for Ukraine. He also serves as a senior fellow at the Stockdale Center for Ethical Leadership at the United States Naval Academy and is a member of an expert group advising the Defense Advanced Research Projects Agency (DARPA) on legal and ethical dimensions of AI applications in military operations. He works in the fields of international law on the use of force, international human rights law, international criminal law, and military ethics. regan@georgetown.edu

Christine Straehle is professor of practical philosophy at the University of Hamburg, and professor for ethics and applied ethics at the University of Ottawa. Her research focuses on the ethics of migration, questions of global justice, and conceptions of vulnerability and autonomy in moral philosophy. She is editor or co-editor of several volumes, most recently The Political Philosophy of Refuge (2019), and is editor for the interdisciplinary journal Global Justice: Theory Practice Rhetoric. christine.straehle@uni-hamburg.de

Tiziana Torresi is senior lecturer in political theory in the Politics and International Relations and Philosophy departments at the University of Adelaide. She holds a Bachelor of Arts with Honours, first class, from the University of New South Wales, and a Doctor of Philosophy in politics and international relations from the University of Oxford. Her main research interests are in political philosophy. She writes on migration and temporary labor migration, migrants' voting rights, the role of cities in migration, citizenship, and populism. tiziana.torresi@adelaide.edu.au