That might correlate with utility or happiness, but that’s an empirical question, not a given.
No one is claiming it is.
Edit: The argument is not “evolution has selected us for X, therefore we should do X”. It’s “evolution has selected as for X, therefore humans have property Y, therefore organizing society according to principal Z leads to more efficient utility generation.”
Evolution has selected for successful reproduction. That might correlate with utility or happiness, but that’s an empirical question, not a given.
No one is claiming it is.
Edit: The argument is not “evolution has selected us for X, therefore we should do X”. It’s “evolution has selected as for X, therefore humans have property Y, therefore organizing society according to principal Z leads to more efficient utility generation.”