This dissertation examines collaborations between the International Trade Union Confederation (ITUC) and non-union elements of global civil society (GCS). GCS is presented as a crucial emergent site of transnational class formation, and ITUC collaborations within this field are treated as potentially important moments in transnational class formation. The goal of the dissertation is threefold. It seeks to 1) address the lacuna in GCS studies around the involvement of organized labour; 2) provide an analysis of what ITUC GCS collaborations mean for the remit and repertoire of action of the ITUC; and 3) provide an analysis of the impact of ITUC collaborations on transnational class formation. What the findings show is that the ITUC is heavily engaged in GCS through numerous collaborations with non-union organizations concerned with environmental degradation, human rights, global economic inequality, and women workers. Most significantly, collaboration within GCS has provided the ITUC an avenue to incorporate the needs of marginalized women workers whose work does not “fit” into the traditional model of trade union organizing. These findings lead to the conclusion that these collaborations have allowed the ITUC to expand the remit of its activities beyond “bread-and-butter” unionism, and expand its repertoire of action beyond interstate diplomacy. However, the findings do not support the idea that the ITUC has adopted a social movement framework, although it is clear that the ethos of social movement unionism has had an impact on the organization. Nonetheless, the dissertation concludes that the incorporation of marginalized women workers, and the active engagement of the ITUC in global environmental policy debates, signifies a new moment in transnational class formation. / Graduate / 0629 / 0703 / davidbhuxtable@gmail.com