The UK exit from the EU represents a qualitative change in the nature of EU membership. On the one hand, it conveyed the lesson that for the Union to be sustainable, membership needs to entail constant caretaking as far as individual members' contributions to the common good are concerned, with...

Variable geometry ought to imply "variably geometry Europe" as variable geometry or differentiated integration in the European Union has reached its limits. Drawing on the lessons of the Eurozone crisis and of Brexit, this chapter argues that (treaty-based) variable geometry or differentiated...