Abstract

In this review of Dominik Perler’s book Eine Person sein, Perler’s reconstruction of the relationship between Thomas Aquinas’s unitarist position and his theory of incontinence is analyzed. Perler argues that the unitarist position of Thomas allowes him to conceive of incontinence as a weakness of the whole psychological system of the person. Unlike the mad person, the incontinent has responsibility because she has preserved a degree of rational control. Perler argues that the incontinent person is not responsible for the spontaneous emergence of desire, which is a natural process, only for the way in which she rationally controls it (or not). By analyzing Aquinas’s notion of naturality with respect to desires, I argue that the person is actually responsible for the emergence of a desire, just in case the content of the desire is constituted by a rational choice of end.