"What would the benefit be? I think the point of the warnings is that there's this thing built into human nature where our ancient ancestors mated and reproduced under conditions where people hitting each other and hitting back was much more of an equilibrium, and now we have instincts that are about that. But incentivizing fair strategies in the Ultimatum game is not about that, it is a different structure that reflects a different bit of math than the bit of math that got incarnated into hitting people back when they hit you. But-but it involves somebody else doing something you think is unfair, and then you make sure you do something that causes them to lose some expected value, even if that thing is just not trading with them. So it's the sort of thing that could map onto the hitting-back instinct if you weren't specifically warned not to map it onto the hitting-back instinct."
"Imagine that room full of children if you told them that, any time somebody made them an unfair offer and tried to cheat them, they ought to hit back in a way that made sure the person lost even more value than that, to teach them a lesson, no matter how much more that cost their own position in expected value. Those kids wouldn't grow up to be dath ilan's Civilization. Possibly they wouldn't grow up to be any civilization at all."