[laredo44]

Well, the objection would be that if man is the source of the rights, then man can remove these rights.

The assertion is that man's nature is the source of the rights, not man. There is a difference. In this scenario, man's nature is the source of man, a circumstance man cannot change anymore than he could change God as the source of man, if that is the case.

[robertpaulsen]

"The assertion is that man's nature is the source of the rights"

Man's nature as a source of rights? No way. Too much evil in the nature of man to grant any rights. And those men end up with the tanks and guns.