Special Issue 11 February 2019 Towards a European Social Union? A Rokkanian–Mephistophelian remark By Martin Heidenreich The deep frictions in the aftermath of the financial and eurozone crises and the related crisis of legitimacy might lead to greater consciousness of the gap between the winners and the losers of Europeanisation processes. In the best of all worlds, this might be the power basis for a stronger and more integrated European Social Union.