—“The only thing anyone needs to live a good life is “be excellent to each other.”if everyone did that or tried their best to do that,the world would be fine. You’re all spouting philosophical bollocks.pipe down and be nice.”—

No, if enough people do that then they are overwhelmed by the people who don’t.

High trust is advantageous in-group but a tragic weakness outgrip.

That’s just (a) operational analysis, and (b) empirical evidence.

You cannot model a polity, set of polities, or all polities as naive extensions of the family. And that is what you are doing.

People compete for advantage at all times, and the value of high trust dissipates rapidly outside of family and community.