There really is such a thing as the psychological unity of humankind. Read a morality tale from an entirely different culture; I bet you can figure out what it's trying to argue for, even if you don't agree with it.

I'm not sure how the first sentence there relates to the second. For example, we can figure out in great detail what a highly alien "intelligence" like evolution "wants", but that doesn't mean that there's much in common between the evolutionary process and our own mental processes.