Didier Georgakakis is Professor of Political Science and Jean Monnet Chair in the Sorbonne School of Politics, University of Paris I, France, Senior Fellow at the Institut Universitaire de France, and Head of the Inter-Departmental European Advanced Studies (IDEAs) programme at the College of Europe in Bruges, Belgium. Martin Westlake is a Visiting Professor at the College of Europe in Bruges, Belgium and a Visiting Professor in Practice at the European Institute, London School of Economics, United Kingdom.