Abstract

This essay defends Aristotelian naturalism against the objection that it is naïvely optimistic, and contrary to empirical research, to suppose that virtues like justice are naturally good while vices like injustice are naturally defective. This objection depends upon the mistaken belief that our knowledge of human goodness in action and choice must come from the natural sciences. In fact, our knowledge of goodness in human action and character depends upon a practical understanding that is possessed by someone not qua scientist but qua practically wise person. I spell out some key features of this knowledge of human form, including its relation to practical reasons and its similarity to the “know-how” of crafts-persons. My account of virtue as knowledge of human form sheds light on the Aristotelian thesis that humans live according to an understanding of their own form. My account also clarifies the kinship and the divergence between Aristotelian and Kantian ethics