Abstract

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 43.1 (2005) 1-19 [Access article in PDF] God's Immutability and the Necessity of Descartes's Eternal Truths Dan Kaufman Descartes's doctrine of the creation of the eternal truths (henceforth "the Creation Doctrine") has been thought to be a particularly problematic doctrine, both internally inconsistent and detrimental to Descartes's system as a whole. According to the Creation Doctrine, the eternal truths, such as the truths of mathematics and those concerning true and immutable natures, are freely created by God.1 The Creation Doctrine has led several scholars to think that Descartes held (or was committed to) the view that the eternal truths are not necessary truths; in fact, there are no necessary truths if Descartes is correct.2 [End Page 1]In fact, however, Descartes held both of the following.The eternal truths are freely created by God.The eternal truths are necessarily true.That Descartes held (1) is uncontroversial; in fact, it is the characteristic thesis of his Creation Doctrine. However, his commitment to (2) is more controversial. I believe the controversy surrounding (2) arises precisely because Descartes' acceptance of (1) is so uncontroversial. That is, some have thought that his acceptance of (1) eliminates any possibility of accepting (2). This view is mistaken. In several texts, it is clear that Descartes believes that the eternal truths are necessarily true; this is especially noticeable in the 2 May 1644 letter to Mesland (AT IV 118; CSMK 235). The task, then, is to account for the necessity of the eternal truths within the confines of the Creation Doctrine; that is, to explain the fact that (2) is true, given that (1) is true.3 Unfortunately, Descartes says precious little about this issue. To make matters worse, there is a scarcity of treatments of this issue in the literature; and the literature that does address this issue tends to treat it quickly and vaguely, perhaps recognizing the difficulty of addressing it in any detail. In this paper, I attempt to remedy this unfortunate situation.I begin by examining the most prominent interpretation of Descartes's explanation of the necessity of the eternal truths: the Immutability Interpretation.4 This interpretation is given by Margaret Osler and most prominently by Edwin Curley.5 According to this interpretation, the eternal truths are necessarily true because they are created by God, and God's will is immutable. I will show that this interpretation is incorrect: It is either too weak to explain the necessity of the eternal truths or it is too strong in that it would commit Descartes to necessitarianism, [End Page 2] a view he does not hold.6 I also show that some suggestions for salvaging the Immutability Interpretation fall short. In the final section I present an alternative interpretation. My interpretation has a firm basis in Descartes's texts, does not have the shortcomings of the Immutability Interpretation, and has several virtues of its own. 1. Immutability Before examining the role, if any, that God's immutability actually plays in Descartes's explanation of the necessity of the eternal truths, it may be helpful to have a working account of God's immutability. To be immutable is not merely to be unchanging, but rather to be unable to change. That is: I1: x is immutable iff x is essentially unchanging.7We must recognize, however, that there are extrinsic and relational properties that a thing may acquire or lose without any real change in the thing; that is, there are so-called Cambridge changes that something may undergo without thereby being mutable. For example if x is five feet tall at t and x is five foot five at some later time t´, then x has really changed; but if x is not an uncle at t and x is an uncle at some later time t´, then x has not really changed in virtue of acquiring this property. The idea is that there are some properties which are, to use Edward Wierenga's and Nicholas Wolterstorff's term, "change...