Abstract

The aim of this essay is to sketch the basic outline of Aquinas’s metaethics and its support for his virtue-based ethics. When Aquinas’s central metaethical thesis is combined with his theological views, especially his understanding of the doctrine of divine simplicity, then the theological interpretation of the central metaethical thesis constitutes the basis for a religious ethics that makes God essential to human morality but without tying morality to God’s will. The result is a metaphysically grounded, objective normative virtue ethics which is theological at least in this sense that it is ultimately based in God’s nature.