Workers' inquiry developed in a context marked by rapid industrialization, mass migration and the use of industrial sociology to discipline the working class. It was formulated within autonomist movements as a sort of parallel sociology based on a radical re-reading of Marx and Weber against the politics of the communist party and the unions. The process of inquiry took the contradictions of the labour process as a starting point and sought to draw out such political antagonisms into the formation of new radical subjectivities. With this issue we seek to rethink workers' inquiry as a practice and perspective, in order to understand and catalyse emergent moments of political composition.