Peter Niesen has taught Political Theory at Universität Hamburg, Germany, since 2013. Before that he worked at Technische Universität Darmstadt and Goethe Universität Frankfurt/Main. Niesen is speaker of the Political Theory Standing Group in the German Political Science Association (DVPW) and co-convenes the International Political Theory Standing Group in the European Consortium for Political Research. With Markus Patberg, he is conducting a research project on "Reclaiming Constituent Power: Emerging Counter-Narratives in European Constitutionalisation". The project is to answer the question whether and, if so, where, a *Pouvoir Constituant* exists in the complex European polity. Niesen believes Brexit to be a disaster of historical proportions, not least for the European philosophical research community.