This book offers an interdisciplinary analysis of the interplay between protest and institutions during an era of multiple crises in Denmark, Germany, Hungary, Italy, Romania and the UK. Focusing on the interaction between citizens, social movements and movement parties, and questions of democratic quality related to participation, competition and responsiveness, it considers the role of traditional and social media when connecting institutional and non-institutional arenas. Building on insights from political science, sociology and communication studies, it combines an original cross-national survey, interviews, media analysis, document analysis, statistical analytical techniques, critical discourse analysis, social network analysis and natural language processing, in a comparative perspective.