This essay explores the vexed issue of individual corporeal substance in Descartes' natural philosophy. Although Descartes' often referred to individual material objects as separate substances, the constraints on his definitions of matter and substance would seem to favor the opposite view; namely, that there exists only one corporeal substance, the plenum. In contrast to this standard interpretation, however, it will be demonstrated that Descartes' hypotheses make a fairly convincing case for the existence of individual material substances; and the key to (...) this new found individuation is a long neglected set of passages in the Principles of Philosophy. (shrink)

The aim of philosophy, abstractly formulated, is to understand how things in the broadest possible sense of the term hang together in the broadest possible sense of the term. Under 'things in the broadest possible sense' I include such radically different items as not only 'cabbages and kings', but numbers and duties, possibilities and finger snaps, aesthetic experience and death. To achieve success in philosophy would be, to use a contemporary turn of phrase, to 'know one's way around' with respect (...) to all these things, not in that unreflective way in which the centipede of the story knew its way around before it faced the question, 'how do I walk?', but in that reflective way which means that no intellectual holds are barred. (shrink)

This chapter contains section titled: Descartes's Uses of the Word “Substance” Individual Substances in the Meditations and Objections and Replies Descartes and Aristotle Modes and Attributes: Tropes Two Further Points About Substances in the Meditations Substance in the Synopsis of the Meditations Substance in the Fourth Replies Substance in the Principles The Most General Things Uni‐Generic Attributes Attributes in General Substance in Descartes's Later Works Conclusion Acknowledgments References and Further Reading.

The seventeenth century was a period of extraordinary invention, discovery and revolutions in scientific, social and political orders. It was a time of expansive automation, biological discovery, rapid advances in medical knowledge, of animal trials and a questioning of the boundaries between species, human and non-human, between social classes, and of the assumed naturalness of political inequality. This book gives a tour through those objects, ordinary and extraordinary, which captivated the philosophical imagination of the single most important French philosopher of (...) this period, Rene Descartes. Deborah J. Brown and Calvin G. Normore document Descartes' attempt to make sense of the complex, composite objects of human and divine invention, consistent with the fundamental tenets of his metaphysical system. Their central argument is that, far from reducing all the categories of ordinary experience to the two basic categories of substance, mind and body, Descartes' philosophy recognises irreducible composites that resist reduction, and require their own distinctive modes of explanation. (shrink)

Descartes notoriously characterizes substance in two ways: first, as an ultimate subject of properties ; second, as an independent entity. The characterizations have appeared to many to diverge on the definition as well as the scope of the notion of substance. For it is often thought that the ultimate subject of properties need not—and, in some cases, cannot—be independent. Drawing on a suite of historical, textual, and philosophical considerations, this essay argues for an interpretation that reconciles Descartes's two characterizations. It (...) proposes that both characterizations invoke a type of independence that obtains just in case there is no relation to another entity that holds by the nature of the entity in question. Even though the ultimate subject of properties is sometimes not independent in other respects, it satisfies this independence-by-nature condition. (shrink)

According to the Monist Interpretation of Descartes, there is really only one corporeal substance—the entire extended plenum. Evidence for this interpretation seems to be provided by Descartes in the Synopsis of the Meditations, where he claims that all substances are incorruptible. Finite bodies, being corruptible, would then fail to be substances. On the other hand, ‘body, taken in the general sense,’ being incorruptible, would be a corporeal substance. In this paper, I defend a Pluralist Interpretation of Descartes, according to which (...) there are many corporeal substances. In particular, I show that none of the claims in the Synopsis about incorruptibility and substance entail either that finite bodies are not substances, or that the only corporeal substance is the entire plenum. (shrink)

Traditionally, independence accounts of substance have held pride of place. Aristotle, Aquinas, Descartes and Spinoza—among many others—accepted independence accounts in one form or another. The general thrust of such views is that substances are those things that are apt to exist in themselves. In this paper, I argue that several contemporary independence theories of substance—including those of Kit Fine, E.J. Lowe and Michael Gorman—include an ad hoc element that renders them unacceptable. I'll also consider the theories of Hoffman and Rosenkrantz.

In the first part of this paper I explore the relations among distinctness, separability, number, and non-identity. I argue that Descartes believes plurality in things themselves arises from distinction, so that things distinct in any of the three ways are not identical. The only exception concerns universals which, considered in things themselves, are identical to particulars. I also argue that to be distinct is to be separable. Things distinct by reason are separable only in thought by means of ideas not (...) clear and distinct. In the second part I argue that the notion of separability in Descartes’s account of real distinction between mind and body is subject to five different interpretations. I claim that the heart of Cartesian dualism concerns the separability of the attributes thought and extension. It does not require that mind and body are separable in the sense that each can exist without the other existing. (shrink)

This is a 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. (shrink)

How we understand Descartes’s physics rests on how we interpret his ontological commitment to individual bodies, and in particular on how we account for their individuation. However, Descartes’s contemporaries as well as contemporary philosophers have seen Descartes’s account of the individuation of bodies as deeply flawed. In the first part of this paper, I discuss how the various problems and puzzles involved in Descartes’s account of the individuation of bodies arise, and the relevance of these problems for his physics. With (...) an eye toward resolving these puzzles, I argue for an interpretation of the Cartesian ontology in which bodies are not individuated by motion but, instead, are mind-dependent. As part of this reading, I demonstrate the sense in which we can clearly and distinctly perceive bodies, and also the senses in which the real, conceptual, and modal distinctions apply to them. I conclude by explaining how this account of the mind-dependent individuation of bodies is consistent with Descartes’s definition of ‘motion’ and ‘a body’ in Principles, Part II, section 25—the very passage that prima facie entails the most troubling of the individuation puzzles. Finally, I show that this account is consistent with Descartes’s general goal in constructing his physics. (shrink)

. The concept of bodily health is problematic for mechanists like Descartes, as it seems that they need to appeal to something extrinsic to a machine, i.e., its purpose, to determine whether the machine is working well or badly, and so healthy or unhealthy. I take issue with this claim. By drawing on the history of medicine, I suggest that in the seventeenth century there was space for a non-teleological account of health. I further argue that mechanists can and did (...) appeal to structural integrity, as a non-teleological notion of form, to ground the norms required for ascriptions of health. (shrink)

Descartes propounded the allegedly "strange", "peculiar", "curious" and "incoherent" doctrine that necessary truths are made true by God's voluntary act. It is generally held that this doctrine must be kept out of sight while other Cartesian topics are being discussed. This paper offers an interpretation of this Cartesian doctrine under which it comes out as reasonable, consistent with the rest of his philosophy, and possible even true. According to this interpretation--which is more respectful of and close to Descartes's text than (...) is the customary one--Descartes equated the alethic modalities with facts about human intellectual limitations, somewhat in the manner of Wittgenstein. Thus, God created modalities creating humans in the way he did. (shrink)

This chapter contains section titled: Extension and Extended Substance? Bodies and Extended Substances Bodies, Space, and the Ontology of Everyday Life Acknowledgments References and Further Reading.

The thirty chapters work through various fundamental metaphysical issues, sometimes focusing more on scholastic thought, sometimes on the seventeenth century.

: Given Descartes's conception of extension, space and body, there are deep problems about how there can be any real motion. The argument here is that in fact Descartes takes motion to be only phenomenal. The paper sets out the problems generated by taking motion to be real, the solution to them found in the Cartesian texts, and an explanation of those texts in which Descartes appears on the contrary to regard motion as real.

Although the basis of modern biology is Cartesian, Descartes’s theories of biology have been more often ridiculed than studied. Yet, Dennis Des Chene demonstrates, the themes, arguments, and vocabulary of his mechanistic biology pervade the writings of many seventeenth-century authors. In his illuminating account of Cartesian physiology in its historical context, Des Chene focuses on the philosopher’s innovative reworking of that field, including the nature of life, the problem of generation, and the concepts of health and illness. Des Chene begins (...) by surveying works that Descartes would likely have encountered, from late Aristotelian theories of the soul to medical literature and treatises on machines. The Cartesian theory of vital operations is examined, with particular attention to the generation of animals. Des Chene also considers the role of the machine-model in furnishing a method in physiology, the ambiguities of the notion of machine, and of Descartes’s problem of simulation. Finally, he looks at,the various kinds of unity of the body, both in itself and in its union with the soul. Spirits and Clocks continues Des Chene’s highly regarded exploration -- begun in his previous book, Life’s Form -- of the scholastic and Cartesian sciences as well as the dialogue between these two worldviews. Introduction 1 Part One - Tales of the Bête-Machine [ 1 ] - Self-Movers 13 [ 2 ] - Where Do Machines Come From? 32 [ 3 ] - The Uses of Usus 53 Part Two - Machines, Mechanisms, Bodies, Organs [ 4 ] - Tools of Knowledge 71 [ 5 ] - Jeux D’Artifice 103 [ 6 ] - Unity of the Body 116 Conclusion 153 Bibliography 159 Index 177. (shrink)

This book is a systematic study of Descartes' theory of causation and its relation to the medieval and early modern scholastic philosophy that provides its proper historical context. The argument presented here is that even though Descartes offered a dualistic ontology that differs radically from what we find in scholasticism, his views on causation were profoundly influenced by scholastic thought on this issue. This influence is evident not only in his affirmation in the Meditations of the abstract scholastic axioms that (...) a cause must contain the reality of its effects and that conservation does not differ in reality from creation, but also in the details of the accounts of body-body interaction in his physics, of mind-body interaction in his psychology, and of the causation that he took to be involved in free human action. In contrast to those who have read Descartes as endorsing the "occasionalist" conclusion that God is the only real cause, a central thesis of this study is that he accepted what in the context of scholastic debates regarding causation is the antipode of occasionalism, namely, the view that creatures rather than God are the causal source of natural change. What emerges from the defense of this interpretation of Descartes is a new understanding of his contribution to modern thought on causation. (shrink)