Matthew Longo is an Assistant Professor of Political Science at Leiden University. His research sits on the intersection of political theory and international relations, and focuses on several critical issues in global politics—borders, sovereignty, and security—or how states react to the challenges posed by terrorism and immigration. He is the author of the new book, The Politics of Borders: Sovereignty, Security, and the Citizen after 9/11 (Cambridge University Press, 2018). His work has also been published in academic journals such as American Journal of Political Science, Geopolitics, and Democratization, as well as in the New York Times, the Los Angeles Times and has been featured in the Washington Post and National Public Radio. Before joining the faculty at Leiden, he was the Clayman Junior Research Fellow in Politics and Political Ideas at St Anne’s College, Oxford. He received his PhD with distinction from Yale University in 2014 and was awarded the American Political Science Association's Leo Strauss Award for the Best Doctoral Dissertation in Political Philosophy.