Private property ownership is what differentiates humans from the other animals.
"For, every man has by nature the right to possess property as his own. This is one of the chief points of distinction between man and the animal creation, for the brute has no power of self direction... But animal nature, however perfect, is far from representing the human being in its completeness, and is in truth but humanity's humble handmaid, made to serve and to obey.
It is the mind, or reason, which is the predominant element in us who are human creatures; it is this which renders a human being human, and distinguishes him essentially from the brute. And on this very account - that man alone among the animal creation is endowed with reason - it must be within his right to possess things not merely for temporary and momentary use, as other living things do, but to have and to hold them in stable and permanent possession; he must have not only things that perish in the use, but those also which, though they have been reduced into use, continue for further use in after time."