Argumenta – Journal of Analytic Philosophy

This article concerns Aquinas’ practical doctrine on two philosophical difficulties underlying much contemporary ethical debate. One is Hume’s Is-ought thesis and the other is its radical consequence, Moore’s Open-question argument. These ethical paradoxes appear to have their roots in epistemological scepticism and in a deficient anthropology. A possible response to them can be found in that a) Aquinas defends the substantial unity and rationality of the human being; b) Thomistic natural law is a natural consequence of the rational being; c) Thomistic human intellect is essentially theoretical and practical at…