The Islamic State (ISIS) perplexed the world when its leader Abu BakrAl-Baghdadi declared a caliphate in 2014. This declaration was not justfollowed by territorial expansion, but also by several new developmentsin terrorism’s actors, ideology, methods and geopolitics. Terrorism andCounterterrorism after the Caliphate analyzes these new developmentsin terrorism and counterterrorism in the wake of the ISIS-caliphate.This multidisciplinary volume combines legal, philosophical and international relations perspectives in two main lines of inquiry. First, the concepts relevant to terrorism and counter-terrorism studies are analyzed,such as the status of the ‘caliphate’, the role of ‘ideology’ and the linkswith ‘militant democracy’. Second, country-specific contributions discussthe latest developments in terrorism and counterterrorism in Belgium,the Netherlands, Germany, Italy and the United States.Terrorism and Counterterrorism after the Caliphate is essential readingfor researchers and policy makers alike, grappling with the postcaliphate world of terrorism. The book constitutes a timely follow-up to earlier volumes in which Leiden Jurisprudence researchers collaboratedwith other Dutch and international scholars on the issues of terrorism,counter-terrorism and militant democracy: Terrorism: Ideology, Law andPolicy (2011), The State of Exception and Militant Democracy in a Timeof Terror (2012) and Militant Democracy - Political Science, Law andPhilosophy (2018).Afshin Ellian is Professor of Jurisprudence at Leiden University. His latestbook is Reflections on Democracy in the European Union (2020, as coeditor).Bastiaan Rijpkema is Associate Professor of Jurisprudence at LeidenUniversity. His most recent book is Militant Democracy: The Limits ofDemocratic Tolerance (2018).Gelijn Molier is Associate Professor of Jurisprudence at Leiden University.In 2018 he co-edited Strijd om de democratie: essays over democratischezelfverdediging [Struggle for democracy: essays on democratic selfdefense]