Nova et vetera

Fr. Stephen L. Brock is arguably one of the most important contemporary contributors to the Thomistic understanding of natural law. Hence, the publication of his updated and revised doctoral dissertation on the topic [End Page 289] of the metaphysics of natural law in St. Thomas will be gladly received by Thomistic scholars and moral theorists alike. In The Light That Binds, Brock's central task is to explain the metaphysics of the promulgation of natural law in man. Put differently although extant literature on natural law may be useful for action analysis—why lying is always wrong, say—less attention has been paid to the way in which natural law has been promulgated by God and is present in the human intellect. What literature is available, either as an explanation of St. Thomas or as criticism of the same, has failed to do Aquinas justice, so Brock argues.

The book comprises seven chapters and an introduction. In the first chapter, Brock's central goal is to survey the ways in which (especially more recent) commentators of Aquinas have distorted the sense in which natural law constitutes genuine law, as well as the relationship between natural law and God. For, there is a line of thought on natural law, particularly prominent in the "new natural law" tradition, according to which the principles at the heart of the theory do not fully satisfy the four criteria of legitimate law given by Aquinas. Rival views have natural law constituting a real law, but in virtue of an epistemically explicit reliance on God as lawgiver, among other distortions. Figureheads surveyed in the chapter include Dom Odon Lottin, Ernest Fortin, and Francisco Suárez, among others.

In the second chapter, Brock outlines and defends his positive view regarding the legal status of the natural law by way of continued discussion of Lottin, particularly Lottin's contention that St. Thomas was heavily influenced by a mid-thirteenth-century Franciscan tract, De legibus et praeceptis. Brock argues that St. Thomas conceives of natural law as having an even closer relationship to eternal law than is posited by the earlier Franciscan tract, and the rest of the chapter is largely focused on unpacking this close relationship. In sum, natural law is law because it involves a rational ordering by God of our intellect to the goods of our nature, a human participation in an eternal ordering of all things to their ends (i.e., the eternal law). We need not discover the source of the ordering—namely, God—in grasping the first principles of his ordering, as Brock explains here and elsewhere. But the strictly legal status of the principles requires that natural law comes from a legitimate authority, among other essential elements.

Chapters 3 and 4 tackle the more human side of the metaphysics of natural law. More concretely, in these chapters, Brock explains the wheres and the whats of our possession of the natural law. For, not all ordering of objects to ends implies the sort of normativity we see in the natural law. Brute animals, among others, have natural inclinations too, and yet they are not governed through these instinctual drives by a natural law. Natural law [End Page 290] is present preeminently in the human intellect, Brock argues, and is not to be confused with the prerational drives that we share as part of our animal nature. God instills these rational drives—the light, as it were—into reason in such a way that an individual can grasp its force autonomously, as basic conceptional truths about what right and wrong consist in (72). Here it would have been nice for Brock to reflect briefly on how Aquinas's views on moral knowledge fit within his broader epistemological commitments, as the natural (conceptual) knowledge of right and wrong at first glance shares common ground with the Franciscan tradition on divine illumination as found in figures...