But you know what? That doesn't happen _within_ countries. I can't go murder someone here in the vast majority of countries without being punished severely. W

But you know what? That doesn't happen _within_ countries. I can't go murder someone here in the vast majority of countries without being punished severely. What is responsible for the difference? Within countries, there is government Between countries, there is anarchy. So your point is just giving an example of my point that self-interested individuals will set up a government that prohibits the initiation of force. (To be clear, I don't advocate a world government, though.)