Abstract

In this study, Daniel Westberg offers readers an account of Aquinas’s ethics and the action theory that underlies it. Both friends and enemies of Aquinas have covered this subject matter before, but early commentators misunderstood central parts of Aquinas’s ethical theory, and they handed down their misinterpretations in traditions that continue into the present. Against the traditional view that Aquinas’s medieval Christian inheritance, with its focus on the will, and on grace and love, required an action theory fundamentally different from Aristotle’s, Westberg shows that the core of Aquinas’s action theory is authentically Aristotelian. Aquinas is neither a natural law theorist nor a voluntarist, as he is commonly thought to be. Instead, he holds a complex yet plausible account of human action that gives a greater role to practical reason and prudence than commentators generally recognize. This central contention is important, for it counters centuries of misinterpretation, and Westberg argues effectively for it. For this reason, anyone with a serious interest in medieval ethics should read Westberg’s study.