[icebraining]

The people who believe property rights are "natural" aren't saying they aren't a human creation at all. Just that they are a human right, like other rights that are also human creations.

I don't think this is true; why would it need the "natural" moniker in such case? Natural rights proponents claim that such rights are not invented, but an universal truth, either endowed by a god (like in the US Declaration of Independence) or derived from some natural property, such as human reason.

This is contrast with people who claim that all rights are subjective creations, not an innate property of nature nor a consequence of such, and therefore are not universal.