St. Thomas’s Natural Law Theory

Abstract

Fifty years of debate have strengthened Germain Grisez’s 1965 interpretation of St. Thomas Aquinas’s famous article on the natural law in Summa theologiae I-II.94.2. Revisiting Grisez’s argument in light of these developments reveals that his “gerundive interpretation” of the first principle of practical reason is not only Thomistic, but essentially Aquinas’s interpretation.