Ethnocentricnationalism isn't dead and should be confronted head on

This is the argument of Jerry Z. Muller in the latest issue of Foreign Affairs. He argues that WWII has not the end of ethnonationalism in Europe. He points towards the huge population transfers at the close of the war and the disintergration of Czechoslovakia, Yugoslavia, and the USSR down to their constituent ethnicly based nation states. Indeed, Muller argues that there is something inherent in the process of modernisation which leads to ethnic conflagration.
As an historical argument this is all well and good. Whether or not you think that europe is entering a postnational age, or is useing the conforting framework of the EU to disintergrate further (e.g. Scotland, Wallonia, Flanders), or a bit of both, this is not the important question. Muller's implication, and indeed what he finishes his article with, is what will be the fate of the post-colonial, especially African countries, who have artificial borders cutting across ethnic lines. He believes that population transfer is necessary and that the borders of the nations of the "southern world" are not set and will be subject to bloody change. If this is the case then ethnocentricnationalism, real and "imagined", will be the driving force. We need to start planning. Now.