Societies with private property are often described as free societies. Part of what this means is surely that owners are free to use their property as they please; they are not bound by social or political decisions. […] But that cannot be all that is meant, for it would be equally apposite to describe private property as a system of unfreedom, since it necessarily involves the social exclusion of people form resources that others own.

Jeremy Waldron, ‘Property’, in Edward Zalta (ed.), The Stanford Encyclopedia of Philosophy, Fall 2004, sect. 5