Pass Laws in South Africa were a form of internal passports intended to give substance to 'Apart' heid (heid means ness, but could equally mean hate here). The idea of self determination wasn't just a South African thing. As Empires and the idea of expanding to conquer everyone with 'a better way' was failing, the idea that people who are intrinsically the same should determine their own destiny was rising. I think culture is beautiful, but also fairly random. Our culture depends on the path we have stumbled on. Our culture gains flavour as we are exposed to new ingredients. Passports just formalise modern Global Apartheid and Xenophobia.