1. As for what decides the individual's rights in a society, this is a pretty complicated question but the answer is going to be rooted in evolutionary psycholo

1. As for what decides the individual's rights in a society, this is a pretty complicated question but the answer is going to be rooted in evolutionary psychology, cultural evolution and memetic evolution. On what grounds do they hold that right? I'm not religious so I can't appeal to an ultimate moral authority. See (2). 2. If you grant and enforce property rights you stake the individual, and the overall outcome is a more prosperous world. Removing property rights is a good way to collective starvation, it's been tried before. So it's moral in the sense that enforcing property rights minimises human suffering through the above mechanism.