" The principle of the national state, that is to say, the political demand that the territory of every state should coincide with the territory inhabited by one nation, is by no means so self-evident as it seems to appear to many people to-day. Even if anyone knew what he meant when he spoke of nationality, it would be not at all clear why nationality should be accepted as a fundamental political category, more important for instance than religion, or birth within a certain geographical region, or loyalty to a dynasty, or a political creed like democracy (which forms, one might say, the uniting factor of multi-lingual Switzerland). "

― Karl Popper , The Open Society and Its Enemies