Descartes and Augustine (review)

As most readers of this journal well know, scholars in the history of philosophy can, however roughly, be divided into two distinct (and sometimes antagonistic) camps: those who think that work on the great philosophers of the past should focus almost exclusively on an analysis of their theses and arguments, and those who believe that we cannot truly understand any philosopher’s ideas without serious investigation into the historical, philosophical and even more general intellectual context of their thought. Stephen Menn’s book is a profoundly good example of the latter school.

While it is undeniable that Descartes was strongly influenced by his Jesuit education and by his later reading of latter-day scholastics like Suarez, and that he was motivated in part by a desire to move philosophy beyond its sterile and unprogressive Aristotelian paradigm, one of the crucial questions in Cartesian scholarship concerns the extent to which Descartes was himself an Augustinian Platonist. In this long, brilliant, learned, at times tedious but generally fascinating study, Menn argues that in terms of both method and substance, with respect to motivation, discipline and goals, there was no thinker more important for Descartes’s intellectual development and philosophical project than St. Augustine. Taking on the great triumvirate of French Cartesian scholarship—Gilson, Gueroult and Gouhier, all of whom argued that, while it is possible to find Augustinian elements in Descartes’s philosophy, nonetheless his thought is radically anti-Augustinian, sharing neither “the Augustinian spirit nor the Augustinian conception of philosophy itself” (8–10)—Menn insists that Augustinian principles inform and sustain in a very deep way Descartes’s metaphysics and epistemology. Moreover, Descartes’s general philosophical project is fundamentally the same as that of the Bishop of Hippo: to show how true wisdom can be born only from scientia. For Descartes, this means showing how the failure of Aristotelian science should lead not to a suspicion of science in general, nor to limiting oneself to a skeptical prudentialist moralizing (such as that of the Renaissance humanists), but to a true wisdom based on certain knowledge of the world. That knowledge of the world will, of course, be a mechanistic one, but it will be grounded in an Augustinian metaphysics. In the end—and here is where Menn most clearly takes issue with Gilson and Co.—the project is to reconcile Christianity and philosophical knowing, precisely what Augustine set out to do.

Understanding Augustine, Menn claims, requires an understanding of Plotinus and the Platonist tradition. And this, he further insists, demands that we know the essential elements of Plato’s metaphysics itself. Menn’s pursuit of depth and attention to detail can sometimes be wearying—do we really need in a book such as this a discussion of the variations in Plato’s explanation of how sensible particulars relate to intelligibles between the middle and late dialogues?—but in the end most of it pays off. We find out what Augustine found of value in his reading of Plotinus and what he needed to leave behind. Of the greatest importance, especially for someone seeking to move beyond the materialism of the Manicheans, was a conception of the human soul as an incorporeal thing and an understanding of God or nous as an immaterial and transcendent source of being and, through illumination, of knowledge. “[Augustine] went to the Platonists to learn a method for understanding God and the soul, and he accepts a great deal of the doctrine that comes from this way of understanding them, but he knew from the beginning what it was he wanted to understand: it was the God and the human souls described in the Christian scriptures” (166).

What Descartes wanted was much the same, although he hoped to put it to further use by returning from the heights of metaphysics to the most general science of the natural world (physics) and the particular, practical sciences (wisdom) that follow from it. If he could successfully ground his physics in proper metaphysical first principles, then his philosophical goals would...