Michael Rea

There are five individually plausible and jointly incompatible assumptions underlying four familiar puzzles about material constitution. The problem of material constitution just is the fact that these five assumptions are both plausible and incompatible. I will begin by providing a very general statement of the problem. I will present the five assumptions and provide a short argument showing how they conflict with one another. Then, in subsequent sections, I will go on to show how these assumptions underlie each of the four puzzles. I will conclude by providing an exhaustive taxonomy of possible solutions to the problem.

The doctrine of the Trinity maintains that there are exactly three divine Persons (Father, Son, and Holy Spirit) but only one God. The philosophical problem raised by this doctrine is well known. On the one hand, the doctrine seems clearly to imply that the divine Persons are numerically distinct. How else could they be ’three’ rather than one? On the other hand, it seems to imply that Father, Son, and Holy Spirit are identical. If each Person is divine, how else could there be exactly ’one’ God? But the divine Persons can’t be both distinct and identical. Thus, the doctrine appears to be incoherent. Some try to solve this problem by appeal to the view that identity is sortal-relative. In this paper, I argue that this strategy is unsuccessful as a stand-alone solution to the problem of the Trinity.

In World Without Design: The Ontological Consequences of Naturalism, I argued that there is an important sense in which naturalism’s current status as methodological orthodoxy is without rational foundation, and I argued that naturalists must give up two views that many of them are inclined to hold dear—realism about material objects and materialism. In a review recently published in Faith and Philosophy, Dale Jacquette alleges that my arguments in World Without Design are directed mainly against strawmen and that I have neglected to discuss at least one formulation of naturalism that straightforwardly addresses my main objections. In this reply, I show that these and other objections raised by Jacquette are unsound and, in fact, rest on egregious misrepresentations of the book.

The question raised by this volume is “How successful is naturalism?” The question presupposes that we already know what naturalism is and what counts as success. But, as anyone familiar with the literature on naturalism knows, both suppositions are suspect. To answer the question, then, we must first say what we mean in this context by both ‘naturalism’ and ‘success’. I’ll start with ‘success’. I will then argue that, by the standard of measurement that I shall identify here, naturalism is an utter failure.

In this paper I provide a metaphysical account of the incarnation that starts from substantive assumptions about the nature of natures and about the metaphysics of the Trinity and develops in light of these a story about the relations among the elements involved in the incarnation. Central to the view I will describe are two features of Aristotle's metaphysics, though I do not claim that my own development of these ideas is anything of which Aristotle himself would have approved: (i) a hylomorphic understanding of material objects; (ii) a doctrine of numerical sameness without identity; and (iii) the view that the nature of a thing can appropriately be identified with its form. These ideas, along with other important aspects of the metaphysical framework with which I shall be working, are laid out in the first five sections below, followed in the sixth section by a brief sketch of the account of the Trinity that Jeff Brower and I have presented in detail elsewhere. In the final section, I present my account of the incarnation.

In this paper, I present an Aristotelian solution to the problem of material constitution. The problem of material constitution arises whenever it appears that an object a and an object b share all of the same parts and yet are essentially related to their parts in different ways. (A familiar example: A lump of bronze constitutes a statue of Athena. The lump and the statue share all of the same parts, but it appears that the lump can, whereas the statue cannot, survive radical rearrangements of those parts.) I argue that if we are prepared to follow Aristotle in making a distinction between numerical sameness and identity, we can solve the problem of material constitution without recourse to co-location or contingent identity and without repudiating any of the familiar objects of common sense (such as lumps and statues) or denying that these objects have the essential properties we ordinarily think that they have.

Classical Christian orthodoxy insists that God is Triune: there is only one God, but there are three divine Persons — Father, Son, and Holy Spirit — who are somehow of one substance with one another. But what does this doctrine mean? How can we coherently believe that there is only one God if we also believe that there are three divine Persons? This problem, sometimes called the ‘threeness-oneness problem’ or the ‘logical problem of the Trinity’, is the focus of this interdisciplinary volume. It includes a selection of recent philosophical work on this topic, accompanied by a variety of essays by philosophers and theologians to further the discussion. The book is divided into four parts, the first three dealing in turn with the three most prominent models for understanding the relations between the Persons of the Trinity: Social Trinitarianism, Latin Trinitarianism, and Relative Trinitarianism. Each section includes essays by both proponents and critics of the relevant model. The volume concludes with a section containing essays by theologians reflecting on the current state of the debate.

In "Persons and Bodies," Lynne Baker defends what she calls the "Constitution View" of human persons, according to which (a) human persons are constituted by their bodies, and (b) constitution is an asymmetric, nontransitive relation that is somehow "intermediate between identity and separate existence". (Baker 2000: 29) Thesis (a), or something like it, is precisely what we would expect from someone who believes that persons and bodies both are material objects. But thesis (b) is distinctive. Materialists who treat constitution as identity arrive at the view that human persons are identical with their bodies, their brains, or some other material object in the vicinity of their heads. At the other extreme, materialists who treat constitution as nothing more than complete overlap without identity arrive at a simple coincidence theory of the relation between persons and bodies (or brains, or whatever). Baker's view is supposed to stake out a novel account of the nature of constitution.