Abstract

It is usual to classify the moral thinking of St. Thomas Aquinas as a theory of natural law. The purpose of the present article is to challenge such a classification. While the notion of natural law does play a part in Aquinas’s teaching on morality, this does not seem to me to be a central role. Indeed there are many reasons why it might be better, today, to stop talking about natural moral law, both in the context of Thomistic philosophy and in the broader context of contemporary ethics. What I now advocate is the position that right reason is the key theme in the ethics of Aquinas.