To presume that markets and market signals can best determine all allocative decisions is to presume that everything can in principle be treated as a commodity. Commodification presumes the existence of property rights over processes, things, and social relations, that a price can be put on them, and that they can be traded subject to legal contract. The market is presumed to work as an appropriate guide—an ethic—for all human action. In practice, of course, every society sets some bounds on where commodification begins and ends.