Matthijs Rooduijn is Associate Professor in the Department of Political Science at the University of Amsterdam. He is the initiator of The PopuList, an international research collaboration which offers academics and journalists an overview of populist, far-right and far-left parties in Europe; founding co-director of the Hot Politics Lab, an interdisciplinary research group using political psychology and adjacent fields to explain salient socio-political themes; and founding co-editor of, and regular contributor to, the Dutch political science blog Stuk Rood Vlees. He studies political parties and voters and the forces that strengthen and weaken liberal democracy.