The Evolution of Selfishness

Evolution and psychological forces are pushing against people caring about strangers. I suspect that over millions of years of evolution, far predating the emergence of humans, there's been a n encouragement of natural selection for eatures that care deeply about their own well being but not very much about others. But i suspect selfishness is just a really powerful force. Do you think that's a silly argument? We're not merely a species that following evolutionary plessures where the cultural species were able to respond to arguments and reasons about what we ought to do. And this was true for the abolition of slavery. It was not in the self interest of the slave owners or the british empire when they