Who is this "our" and "us" you're referring to if everyone has a different sense of morally? Are you talking about the evolution of a "culture" or of "every individual." If these are all different, why would their "evolutions" have the same goal?

This all seems very empty. What's the difference between what you've said here and "all people have different moral frameworks, and they all follow those" (which I don't think is possible to dispute)?