If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.
Poster's Note: omg, it felt so weird typing "2012" up there.
It seems uncontroversial that a substantial amount of behavior that society labels as altruistic (i.e. self-sacrificing) can be justified by decision theoretic concepts like reputation and such. For example, the "altruistic" behavior of bonobos is strong evidence to me that more altruism can be justified by decision theory than I know decision theory. (Obviously, this assumes that bonobo behavior is as de Waal describes).
Still, I have an intuition that human morality cannot be completely justified on the basis of decision theory. Yes, superrationality and such, but that's not mathematically rigorous AFAIK and thus is susceptible to being used as a just-so story.
Does anyone else have this intuition? Can the sense that morality is more than game theory be justified by evidence or formal logic?
Morality is a goal, like making paperclips. That doesn't follow from game-theoretic considerations.