Abstract
This paper argues that Aristotelian ethical naturalism can combine two commitments that are often held to be incompatible: (a) a commitment to a strong form of ethical objectivity and (b) a thoroughgoing historicism about ethical value. The notions of species and life-form invoked by ethical naturalism do not, I argue, rely upon an ahistorical picture of human nature. I develop this idea by building upon Philippa Foot's defence of ethical naturalism in Natural Goodness. I go on to argue that linguistic changes in the ways we articulate the conditions of human flourishing can be understood, in some cases, as transforming those very conditions.