The facts can be stubborn: there are very few countries of the European Union – never mind anywhere else – in which there is not a flourishing political grouping of any stripe that sits uncomfortably with the traditional foundations of democracy. Although not all of them are yet dying from it, most of them are affected to no less a degree by an ill that leads democracies, to different extents, to welcome their own Arturo Uis into the fold, in the form of cells that want nothing more than...