Capitalism really couldn't happen to this degree until industrialism became a thing.

I mean, all you have to do is look at all of recorded human history to see that we're not an altruistic or compassionate species. A person might be altruistic or compassionate, but people aren't. If people were, communism would actually work.

Regardless, tribalism isn't a good thing because you end up with 'that persons skin color is different from mine and that's bad.'