Online research in philosophy

Descartes famously endorsed the view that (CD) God freely created the eternal truths, such that He could have done otherwise than He did. This controversial doctrine is much discussed in recent secondary literature, yet Descartes’s actual arguments for CD have received very little attention. In this paper I focus on what many take to be a key Cartesian argument for CD: that divine simplicity entails the dependence of the eternal truths on the divine will. What makes this argument both important and interesting is that Descartes’s scholastic predecessors share the premise of divine simplicity but reject the CD conclusion. To properly understand Descartes, then, we must determine precisely where he diverges from his predecessors on the path from simplicity to CD. And when we do so we obtain a very surprising result: that despite many dramatic prima facie differences, there is no substantive difference between the relevant doctrines of Descartes and the scholastics . Or so I argue.

There is considerable debate among scholars over whether Descartes allowed for genuine body-body interaction. I begin by considering Michael Della Rocca's recent claim that Descartes accepted such interaction, and that his doctrine of the creation of the eternal truths indicates how this interaction could be acceptable to him. Though I agree that Descartes was inclined to accept real bodily causes of motion, I differ from Della Rocca in emphasizing that his ontology ultimately does not allow for them. This is not the end of the story however, since two of Descartes's successors offered incompatible ways of developing his conflicted account of motion. I contrast the occasionalist view of Nicolas Malebranche that changes in motion derive directly from divine volitions with the non-occasionalist claim of Pierre-Sylvain Regis that such changes derive from a nature distinct from God. In light of Della Rocca's interpretation, it is noteworthy that the issue of eternal truths is relevant to both alternative accounts. Indeed, Regis took the doctrine that such truths are created to provide crucial support for his alternative to an occasionalist account of body-body interaction. What does not help Della Rocca, however, is that Regis's view of motion requires a fundamental revision of Descartes's ontology.

This is the first book-length study of two of Descartes's most innovative successors, Robert Desgabets and Pierre-Sylvain Regis, and of their highly original contributions to Cartesianism. The focus of the book is an analysis of radical doctrines in the work of these thinkers that derive from arguments in Descartes: on the creation of eternal truths, on the intentionality of ideas, and on the soul-body union. As well as relating their work to that of fellow Cartesians such as Malebranche and Arnauld, the book also establishes the important though neglected role played by Desgabets and Regis in the theologically and politically charged reception of Descartes in early-modern France. This is a major contribution to the history of Cartesianism that will be of special interest to historians of early-modern philosophy and historians of ideas.

A long tradition regards Robert Desgabets as a Cartesian empiricist. He says things that sound strikingly like Locke, and he argues against anti-empiricist reasoning in Descartes, Malebranche, and Arnauld. Moreover, throughout his writings he endorses the empiricist principle that nothing is in the intellect except what was previously in the senses. Since the Cartesians are generally supposed to be prototypical non -empiricists, Desgabets’s being a Cartesian empiricist would make him a particularly interesting specimen. In this paper, however, I challenge the case for taking Desgabets to be an empiricist.

Are the laws of nature among the eternal truths that, according to Descartes, are created by God? The basis of those laws is the immutability of the divine will, which is not an eternal truth, but a divine attribute. On the other hand, the realization of those laws, and in particular, the quantitative consequences to be drawn from them, depend upon the eternal truths insofar as those truths include the foundations of geometry and arithmetic.

Descartes's claim that the eternal truths were freely created by God is fraught with interpretive difficulties. The main arguments in the literature are classified as concerning the ontological status or the modalities of possibility and necessity of the eternal truths. The views of the principal defenders of the Creation Doctrine – Robert Desgabets, Pierre Sylvain Régis, and Antoine Le Grand are contrasted with those of Nicolas Malebranche. In clarifying the theological, ontological, and logical terms of the debate we can see that what was at stake was the objectivity and certainty of the truths of mathematics and physics. I conclude by suggesting that this issue might fruitfully be used to clarify the disparate discussions in the contemporary literature.