The term “solidarity” seems to have fallen out of theoretical fashion despite the fact that it has a long history of describing the shared struggles of those oppressed by economic or political power structures. This conference aims to explore the past, present and future of “solidarity at work” on both the conceptual and empirical level. Its focus is on the world of work, which it wants to investigate from a transnational perspective. How have the concepts, conceptions and categories of solidarity shaped labor and the labor movements of different countries? What about the divergent conceptual meanings and practices in these assorted contexts? How have power relations as well as people’s everyday life been changed by the various practices related to solidarity? How do technological and managerial changes help to shift ideas and practices of solidarity? Do we see new forms emerging? Who are the agents of “solidarity at work” and what are the concrete mechanisms involved? More broadly, what are the levers and brakes of solidarity in the workplace today?