 This was one of David Hume’s conclusions. There is nothing natural about private property, wrote Hume. The ‘contrariety’ of our passions and the ‘looseness and easy transition [of material objects] from one person to another’ mean that any situation in which I hold or use a resource is always vulnerable to disruption (Hume 1978 [1739], p. 488). Until possession is stabilized by social rules, there is no secure relation between person and thing. We may think that there ought to be: we may think, for example, that a person has a moral right to something that he has made and that society has an obligation to give legal backing to this moral right. But according to Hume, we have to ask what it is in general for society to set up and enforce rules of this kind, before we can reach any conclusions about the normative significance of the relation between any particular person and any particular thing.