Goodness here is 'flourishing' according to human potential... the best man would be the most physically fit, the most knowledgeable, etc., he who makes the best use of his potential, in every way, according to what he is.
Does that not sound a bit "ubermensch"-ish to anyone? Maybe I'm being hyper-sensitive on the matter, but when I hear that sort of language, with Man as his own god, fulfilling his potential where others are content to be confined by 'superstitions', my thoughts tend to go in that direction.
Reading my description again, I guess it does sort of sound like that.
That's
not the Aristotelian-Perfectionist position, however... and while atheistic Aristotelian perfectionists
could veer into that territory with their moral theory, I have yet to read one who has.
Thomas Hurka, the 'godfather', as it were, of the retrieved theory, perhaps describes it best:
"This moral theory starts from an account of the good life, or the intrinsically desirable life. And it characterizes this life in a distinctive way. Certain properties, it says, constitute human nature or are definitive of humanity -- they make humans human. The good life, it then says, develops these properties to a high degree or realizes what is central to human nature. Different versions of the theory may disagree about what the relevant properties are and so disagree about the content of the good life. But they share the foundational idea that what is good, ultimately, is the development of human nature." (Hurka,
Perfectionism, Oxford University Press, 1993, pp. 3.)