For the last decade the European Union has faced increasingly diverse and complex challenges. The financial and economic crisis, the Eurozone sovereign debt crisis, the migration crisis and recent terrorist attacks have not only highlighted gaps in the EU’s capabilities, but have also exacerbated the erosion of citizens’ trust towards institutions. This has opened up a divide that runs deep into the foundations of the European integration project. Populist and nationalist sentiments, which call into question the EU’s authority and even its raison d’être, have been on the rise, from the Brexit referendum to challenges to democracy and the rule of law in a number of Member States. At the heart of all this are European societies which have never been as diverse and divided on their vision for the European integration project.