Duncan McDonnell is Professor of Politics at Griffith University in Brisbane and an Australian Research Council Future Fellow. Sofia Ammassari is a Research Fellow at the School of Government and International Relations in Griffith University, Brisbane. Ann-Cathrine Jungar is a Professor in Political Science at Södertörn University in Stockholm, Sweden. Anders Ravik Jupskås is the Director of the Center for Research on Extremism (C-REX) at the University of Oslo. Cas Mudde is Stanley Wade Shelton UGAF Professor of International Affairs and Distinguished Research Professor at the University of Georgia.