Tore Bjørgo, Dr., is Director of the Center for Research on Extremism: The Far Right, Hate Crime and Political Violence (C-REX), professor at the University of Oslo, and adjunct professor at the Norwegian Police University College (PHS). His main fields of research have been political extremism and terrorism, racist and right-wing violence, disengagement from violent groups, delinquent youth gangs, crime prevention, and policing. He is associate editor of the journal Perspectives on Terrorism. He has (co)authored or (co)edited sixteen books, including Racist and Right-Wing Violence in Scandinavia (1997), Root Causes of Terrorism (2005), Perspectives of Police Science in Europe (2007), Leaving Terrorism Behind: Individual and Collective Disengagement (2009), Strategies for Preventing Terrorism (2013), Preventing Crime: A Holistic Approach (2016), The Dynamics of a Terrorist Targeting Process: Breivik and the 22 July Attacks in Norway (2016), and a special issue on Terrorism from the Extreme Right (2018). https://orcid.org/0000-0003-3985-4444 Miroslav Mareš, PhD, is professor at the Department of Political Science, Faculty of Social Studies Masaryk University (FSS MU). He is guarantor of the study program Security and Strategic Studies and researcher at the International Institute of Political Science of the FSS MU. He focuses on research of political violence and extremism and security policy, specifically in the Central European context. He is a member of the editorial board of the Radicalisation Awareness Network (RAN) in the EU. He is a co-author (with Astrid Bötticher) of the book Extremismus – Theorien – Konzepte – Formen (Oldenbourg Verlag, 2012) and co-author (with Jan Holzer and Martin Laryš ) of the book Militant Right-Wing Extremism in Putin´s Russia. Legacies, Forms and Threats (Routledge, 2019) and author or co-author more than 200 scientific academic articles, chapters and books. https://orcid.org/0000-0002-7102-3205