This book analyzes how a sizable group of Gennan workers came to support Communism and how they in turn influenced the emergence and development of the German Communist Party (KPD) in its fonnative period as a mass party. It reconstructs the interaction between a party and the constituency to which it appealed within the constraints and opportunities set by social structures, econo mic conditions, and political competitors. This interaction revolved around the elaboration and implementation of a specific concept of revolutionary politics, and this study investigates both the rise of the KPD...