A nation-state is a political community governed by laws that unites a people with a supposedly common ancestry. When nation-states arose out of city-states and kingdoms and empires, they explained themselves by telling stories about their origins—stories meant to suggest that everyone in, say, “the French nation” had common ancestors, when they of course did not. As I wrote in my book These Truths, “Very often, histories of nation-states are little more than myths that hide the seams that stitch the nation to the state.”