Because we haven't figured out a better way to organize society, let alone get people to adopt it. I hate all these "look at the human race doing irrational thi

Because we haven't figured out a better way to organize society, let alone get people to adopt it. I hate all these "look at the human race doing irrational things, why can't they just do X instead?" Because the human race isn't a single intelligent agent. It's a bunch of individuals with different ideas, goals, and cultures. Everyone is trying to get to their own local optima. It's amazing our species manages to organize and coordinate effectively at all at such a large scale. If you got rid of borders tomorrow, then what? What government should right the laws? Should we have one world government? No government? What type of government? Etc.