In this chapter certain contributions by sociologues du travail that have been more or less explicitly focused upon industrial relations will be considered. The term 'industrial relations', whether it designates an order of social phenomena, or the study of those structures and events, is characteristically imprecise. 'Industrial Relations' as a branch of study can have a historical, economic, or juridical emphasis, and more recent fashions for some kind of 'transdisciplinary' approach have often merely increased the uncertainty over what 'Industrial Relations' 'really is'.