grounds property rights. Most importantly, Reinach asserts that the nature ownership is not determined by positive law but presupposed by it. Some have objected that such realism raises insuperable difficulties as to the origin of ownership, difficulties that could only be dealt with under a more conventionalist approach. I argue that the independence of the nature ownership from positive law is, in fact, compatible with the claim that its existence is dependent on human conventions." /> The metaphysics of ownership - Massin Olivier | sdvig press