Jeffrey E. Brower

Brian Leftow sets out to provide us with an account of Aquinas’s metaphysics of modality. Drawing on some important recent work, which is surely close to the spirit (if not quite the letter) of Aquinas’s thought, he frames his discussion in terms of “truthmakers”: what is it that makes true claims about possibility and necessity—that is to say, what serves as their ontological ground or ultimate metaphysical explanation? Leftow’s main thesis is that, for Aquinas, all true modal claims are made true by one and the same thing—namely, God. Along the way, however, he also attempts to show that Aquinas’s endorsement of this thesis commits him to an objectionable form of Platonism about possible worlds.

Peter Abelard is one of the greatest philosophers of the medieval period. Although best known for his views about universals and his dramatic love affair with Heloise, he made a number of important contributions in metaphysics, logic, philosophy of language, mind and cognition, philosophical theology, ethics, and literature. The essays in this volume survey the entire range of Abelard's thought, and examine his overall achievement in its intellectual and historical context. They also trace Abelard's influence on later thought and his relevance to philosophical debates today.

Few notions are more central to Aquinas’s thought than those of matter and form. Although he invokes these notions in a number of different contexts, and puts them to a number of different uses, he always assumes that in their primary or basic sense they are correlative both with each other and with the notion of a “hylomorphic compound”—that is, a compound of matter (hyle) and form (morphe). Thus, matter is an entity that can have form, form is an entity that can be had by matter, and a hylomorphic compound is an entity that exists when the potentiality of some matter to have form is actualized.1 What is more, Aquinas assumes that the matter of a hylomorphic compound explains certain of its general characteristics, whereas its form explains certain of its more specific characteristics. Thus, the matter of a bronze statue explains the fact that it is bronze, whereas its form explains the fact that it is a statue. Again, the matter of a human being explains the fact that it is a material object, whereas its form explains the specific type of material object it is (namely, human). My aim in this chapter is to provide a systematic introduction to Aquinas’s primary or basic notions of matter and form. To accomplish this aim, I focus on the two main theoretical contexts in which he deploys them—namely, his theory of change and his theory of individuation. In both contexts, as we shall see, Aquinas appeals to matter and form to account for relations of sameness and difference holding between distinct individuals.

There is a traditional theistic doctrine, known as the doctrine of divine simplicity, according to which God is an absolutely simple being, completely devoid of any metaphysical complexity. On the standard understanding of this doctrine—as epitomized in the work of philosophers such as Augustine, Anselm, and Aquinas—there are no distinctions to be drawn between God and his nature, goodness, power, or wisdom. On the contrary, God is identical with each of these things, along with anything else that can be predicated of him intrinsically.

Jeffrey E. Brower presents and explains the hylomorphic conception of the material world developed by Thomas Aquinas, according to which material objects are composed of both matter and form. In addition to presenting and explaining Aquinas's views, Brower seeks wherever possible to bring them into dialogue with the best recent literature on related topics. Along the way, he highlights the contribution that Aquinas's views make to a host of contemporary metaphysical debates, including the nature of change, composition, material constitution, the ontology of stuff vs. things, the proper analysis of ordinary objects, the truthmakers for essential vs. accidental predication, and the metaphysics of property possession.

There is a real question about whether Anselm developed anything like a systematic ethical theory.1 Indeed, scholars have sometimes suggested that his treatment of ethical matters consists in little more than recapitulation of ethical principles implicit in Scripture or transmitted to him by Christian thinkers such as Augustine and Boethius.2 The truth of the matter, however, is quite the opposite. Although it is easy to overlook the systematic nature of Anselm’s ethical theorizing, as well as its genuine originality, his contribution to medieval ethical theory is considerable. Admittedly, none of his philosophical or theological works is devoted to the systematic presentation of ethical issues; nor is there much novelty to be found in them at the level of specific ethical principles. Nonetheless, it is possible to extract from his works..