Transnational social movements base on a variety of activities at the national level. One reason for this is that transnational social movements crucially depend on successful national cooperation between different movement sectors (e.g. Unions, NGOs, and Churches). This paper examines cooperation work across different national movement sectors in the case of the Italian, Polish, and German Global Justice Movements. In particular, it focuses on the role of transnational protest events in facilitating national, cross-sectoral cooperation. Based on interviews with activists of the Global Justice Movements in Italy, Poland, and Germany the analysis shows, firstly, that national solidarity frames are invigorated during transnational protests and allow cross-sectoral rapprochement. Secondly, it reveals that these national reifications of difference interact with (and not necessarily block) transnational solidarity building.
