for the Special Issue and Introduction This first special issue on the Yellow Vests Movement (YVM) published in English has three objectives. First, we advocate that this puzzling movement proved to be an insightful research field for scholars to make a plea for mixed-methods. By so doing, we bridge the usual gaps between positivist and constructivist approaches. Second, after four years of research, this publication is also a first milestone to provide empirical data and analysis of the movement, to better understand its evolution, significance and effects on French society. By combining casestudies and national based comparison, regional face-to-face surveys, national online surveys and in-person surveys, the nine articles provide a clearer and more precise picture of the movement's composition and its evolution over the months. In addition to a detailed description of the social and political components of the movement, several articles propose to establish bridges between the values and opinions of the Gilets Jaunes or Yellow Vests (YVs), the cultural practices of the social groups from which they come, and the modalities of mobilization and form of politicization, inscribed in space and in time. In this way, they provide the debate with valuable keys to understanding the dynamics of the movement. Third, this special issue consequently further analyses how the YVM challenges contemporary social movements studies, the understanding of uprisings and assumptions about contentious politics. The first article introduces the major analytical issues and mixed methods approaches of the 9 articles and their contributions as whole to scholarship on the study of the YVM and social movements in France and from a comparative perspective.