"To justify property rights, two things must be shown. First, the kind of exclusive rights over goods or land that property rights involve must be justified. Second, it must be possible for such property rights to come into being. These are two separate issues. It is one thing to say that it is a good idea for there to be such rights, quite another to say that some person or procedure can bring them about."
van der Vossen, Bas. “Imposing Duties and Original Appropriation.” Journal of Political Philosophy, vol. 23, no. 1, 2015, pp. 64-85. https://doi.org/10.1111/jopp.12029