So I certainly agree that that facts about evolution don’t imply moral facts. But the way you talk seems to imply you think there are other ways to discover moral facts. But I doubt there are objective justifications for human morality that are any better than justifications for lion morality. In terms of what we actually end up valuing biological evolution (a long with cultural transmission) are hugely important. Certainly a brain module for altruism is not a confirmation of altruistic normative facts. But if we want to learn about human morality as it actually exists (say, for the purpose of programming something to act accordingly) it seems very unlikely that we would want to neglect this research area.
So I certainly agree that that facts about evolution don’t imply moral facts. But the way you talk seems to imply you think there are other ways to discover moral facts. But I doubt there are objective justifications for human morality that are any better than justifications for lion morality. In terms of what we actually end up valuing biological evolution (a long with cultural transmission) are hugely important. Certainly a brain module for altruism is not a confirmation of altruistic normative facts. But if we want to learn about human morality as it actually exists (say, for the purpose of programming something to act accordingly) it seems very unlikely that we would want to neglect this research area.