[cess11]

How did you come to this hedonic position?

MacIntyre wrote in response to the failures of utilitarianism and deontology, and certain responses to that, so you'd better have arguments for utilitarianism that top those he knew about.

You've also clearly misread him. His argument is that morality is inherently social and good morals necessarily dependent on a good society. To show how deeply connected morals and society are he opts for the use of descriptions of historical societies, because superstition and fantasy alone, like math or thought experiments, just aren't good enough for him. In this he agrees with Marx and disagrees with parts of the analytic tradition in philosophy.

Specifically in After Virtue he also uses such examples to show that the ethics of a society might carry little moral weight, and that some historical societies were better at understanding and teaching morals than his own, in particular the philosophical ethics of the Enlightenment, i.e. deontology and utilitarianism.

If you actually have an argument for why the napkin math morals and disregard of freedom at the center of utilitarianism would be the pinnacle of human ethics I'd really like to hear it.