In this paper I aim to explore the relationship between teleology and normativity at the intersection of neo-Aristotelian naturalism and constitutivism. First, I show how the two theories rest normativity on a relationship between function (the Aristotelian ergon) and practical reason, paradoxically failing in similar ways to convincingly articulate that relationship. Then, I expose three proposals for mediating between the two poles that converge on a better synthesis between the two competing poles, while not entirely dispelling the suspicion that the hiatus between ergon and practical reason is to some extent irreducible.
