The Ethics of Liberty/territory
From Critiques Of Libertarianism
If the State may be said to properly own its territory, then it is proper for it to make rules for anyone who presumes to live in that area. It can legitimately seize or control private property because there is no private property in its area, because it really owns the entire land surface. So long as the State permits its subjects to leave its territory, then, it can be said to act as does any other owner who sets down rules for people living on his property.
Murray Rothbard, "The Ethics of Liberty" p. 172.