In the early modern period, just before the rise of the modern nation-state, there were hundreds of political units in Europe. Now there are comparatively few. Some observers project that at some point in the future there will be just a handful of empires running the world, but others think the opposite might happen: that the nation-state as a concept will fall into disuse, and that city-states hold the future of politics. In this article Michael Shermer explores these themes.
