Thomas Aquinas has always been viewed as a highly important figure in Western civilization, and the chief philosopher of Roman Catholicism. In recent decades there has been a renewed interest in Aquinas's thought as scholars have been exploring the relevance of his thought to contemporary philosophical problems. The book will be of interest not only to historians of medieval philosophy, but to philosophers who work on problems associated with the nature of material objects. Because human beings are typically understood to be a kind of material object, the book will also be of interest to philosophers working on topics in the philosophy of religion, philosophy of mind, and the philosophy of human nature. Although the work contains the kinds of details that are necessary for a work of historical scholarship, it is written in a manner that makes it approachable for undergraduate students in philosophy and so it would be a welcomed addition to any university library.