Good and Evil

[Neo-Scholastic]

I wonder if you'd agree that there is no authoritative definition of human nature of what constitutes our fulfillment?  The only authority comes from the person who recognizes what is true for them, and them alone.  They can be correct and so can the person who makes another choice.

Then whatever each person identified as their nature would not have any universal commonalities with everyone else. In that case there is no reason for saying that anyone else is truly human or has human rights. Having a nature and the ability to fully define it are two separate questions. I do believe however that reasonable people can agree on the basics such as rational animal.