What is the historical role of punishment in the management of labour? This is the central question of this Special Issue of the International Review of Social History (IRSH), “Punishing Workers, Managing Labour”. Through a close reading of the diverse range of articles included in this Special Issue and by addressing the relatively extensive but highly fragmented scholarship on the subject, this introduction argues that the key to labour management lay in the interplay of differentiated forms of punishment with distinct labour relations, rather than in the imposition of one punitive regime onto an undifferentiated workforce. In other words, the effective management of labour required the systematic differentiation of the workforce; to that end, the imposition of diversified forms of punishment did not merely reflect existing labour distinctions, but also contributed to creating them. This point leads us to address broader methodological and theoretical issues about how we can analyse such complex interactions: how we can compare the role of punishment in the management of labour across space and time, and how our findings can be used to explain short- and long-term historical changes.