Thomas Aquinas's Summa Contra Gentiles: A Guide and Commentary by Brian Davies

Abstract

Reviewed by: Thomas Aquinas's Summa Contra Gentiles: A Guide and Commentary by Brian Davies Raymond Hain Thomas Aquinas's Summa Contra Gentiles: A Guide and Commentary by Brian Davies (New York: Oxford University Press, 2016), xxviii + 485 pp. Brian Davies's Thomas Aquinas's Summa Contra Gentiles: A Guide and Commentary comes two years after the publication of his delightfully (some would say quixotically) ambitious Thomas Aquinas's Summa Theologiae: A Guide and Commentary. Like the first, this second book "aims to be introductory, if also comprehensive, and it does not presume that its reader is already familiar with medieval thinking" (xvii). But while both volumes run close to five hundred pages, the much shorter length of the Summa contra gentiles [SCG] allows Davies a little more breathing room, and the result is a smooth and thoughtful overview of the entire text immensely useful for nonspecialists and worth consulting for specialists. After a brief discussion of Aquinas's life and writings, Davies rejects the view that the SCG was written to aid missionaries, Dominican or otherwise, and instead claims (with the help of the opening chapters of the SCG) that Aquinas has provided "an extended essay in natural theology" in books I–III and then offers "defenses of the articles of faith" in book IV. "And that," he concludes, "is all that we can confidently refer to [End Page 1291] when it comes to the question 'Why did Aquinas write the SCG?'" (15). (But why the need to remark in a footnote that Aquinas "does refer to Islam" in these sections, offering "a brief tirade against Mohammed," even though this "little anti-Islamic outburst" is hardly evidence of a missionary purpose? [397]) Of the remaining seventeen chapters, eight address God's existence, nature, and creative power, six address creatures and their relation to God's providential plan, and the final three address the Trinity, the Incarnation, and the sacraments and salvation. Each chapter follows the same plan: a section of the SCG is explained, with copious quotations and sometimes exhaustive (and exhausting) lists of arguments with lots of examples to make Aquinas's claims both clear and attractive. Each expository section is then followed by Davies's own evaluation of the text. These are the most interesting and readable sections (and worth perusing for a specialist working on the topic at hand), and they make many references to contemporary challenges one might offer to Aquinas, as well as arguments in defense of, and occasionally critical of, Aquinas's views. Davies is most comfortable, and confident, in the eight chapters on God. These make up more than one third of his text (though treating about one fifth of the SCG), and an entire chapter is spent on SCG I, chapter 13 (arguments for God's existence). Davies is certain that Aquinas's arguments for God's existence are not obvious failures, but stops short of calling them successful demonstrations. "My view is that [whether or not they are successful demonstrations] is not an easy question to answer since some of the arguments contain stages that are difficult to understand" (45). Like most defenders of Aquinas, he constructs an example of a causal chain with two types of causes. If my hand holds a stack of books, then each book keeps the book above it from falling to the ground. But my hand is a cause of a different sort, something "whose causal power runs through the chain in such a way as to make the members of the chain do what they do or be what they are" (52). But does Davies think the arguments work? As he often does throughout the commentary, he ends only by quoting from another Aquinas scholar, in this case Edward Feser's defense of this type of argument, and then concludes: "I take it that Feser is suggesting that something that actually exists, but does not have to exist, is potentially nonexistent, and that its sheer existence depends on it being actualized by what cannot not-exist" (55). The remaining chapters on God focus on the divine attributes, which flow (as they do in the parallel questions in the Summa theologiae) from...