Current debates on human rationality are divided between what Matthew Boyle calls the additive and transformative approaches. My concern is not with the current debate, but with Boyle’s alignment of Descartes and Aristotle with the modern approaches, directing his criticisms against the former, and his defence in support of the latter. What motivates my enquiry is whether Boyle’s use of the two philosophers’ theses stands up to scrutiny and consequently whether his alignments are cogent. I focus primarily on Descartes’ position, (...) examining Boyle’s criticisms. Towards the end, I turn to Aristotle’s position and raise two central questions omitted by Boyle. (shrink)

First, I offer a solution to the metaphysical problem of the mind–body relation, drawing on the fact of its distinctness in kind. Secondly, I demonstrate how, contrary to what is denied, Descartes’ metaphysical commitments allow for the intellect's clear and distinct conception of the mind–body union. Central to my two-fold defence is a novel account of the metaphysics of Descartes’ Causal Principle: its neutrality, and the unanalysable, fundamental nature of causality. Without the presupposition, and uniqueness of the mind-body union there (...) can be no mind-body interaction; this throws new light on current concerns in metaphysics and philosophy of mind. (shrink)

In the _Meditations_ and related texts from the early 1640s, Descartes argues that the self can be correctly considered as either a mind or a human being, and that the self’s properties vary accordingly. For example, the self is simple considered as a mind, whereas the self is composite considered as a human being. Someone might object that it is unclear how merely considering the self in different ways blocks the conclusion that a single subject of predication—the self—is both simple (...) and composite, which is contradictory. In response to this objection, this paper develops a reading of Descartes’s various ways of considering the self. I argue that the best reading of Descartes’s qualified claims about the self, i.e., about the self _qua_ mind or the self qua human being, presupposes an account of the unqualified self, that is, of the self _simpliciter_. I argue that the self _simpliciter_ is not a mind, and that it is not a human being either. This result might suggest the pessimistic conclusion that Descartes’s view of the self is incoherent. To avoid this result, I introduce a new metaphysical account of the Cartesian self. On my view, the self is individuated by a unified mental life. The self is constituted by the beings that jointly produce this mental life, and derives its unity from it. (shrink)

Despite eschewing the utility of ends or purposes in natural philosophy, Descartes frequently engages in functional explanation, which many have assumed is an essentially teleological form of explanation. This article considers the consistency of Descartes's appeal to natural functions, advancing the idea that he is utilizing a non-normative, non-teleological form of functional explanation. It will be argued that Cartesian functional analysis resembles modern causal functional analysis, and yet, by emphasizing the interdependency of parts of biological systems, is able to avoid (...) many of the problems attendant upon modern causal theories. It is for this reason, if no other, that the study of Descartes's natural philosophy should be of interest to contemporary theorists of functional analysis. (shrink)

Descartes’s uncompromising rejection of the possibility of animal intelligence was among his most controversial theses. That rejection is based on (1) his commitment to the doctrine of animal automatism and (2) two tests that he takes to be sufficient indicators of thought (the action and language tests). Of these two tests, only the language test is truly definitive, and Descartes is firmly of the view that no animal could demonstrate the capacity to use signs to convey meaning in “all the (...) circumstances of life.” The topic is fascinating for forcing us to ponder what exactly reason is for Descartes and the role it plays in everyday life. This article explores the tensions in Descartes’s arguments produced by an over reliance on the analogy between animals and clocks, including the question of what to make of Descartes’s recognition of the need to posit representational and information-processing subsystems in the brain. (shrink)

This article closely compares the opposing foundations of theoretical philosophy in René Descartes and Ayn Rand. The developmental course of Rand's foundations, with their continual opposition to Descartes, is tracked. Arguments particularly against Descartes are assembled in this article, and the bountiful contemporary scholarship on Descartes is engaged.

An oft-cited truism about the emergence of a new, ‘mechanistic’ approach to natural philosophy in the seventeenth century is that it was inspired by analogy to the workings of clockwork. In Authori...

Ideas about soul and body – about thinking or remembering, mind and life, brain and self – remain both diverse and controversial in our neurocentric age. The history of these ideas is significant both in its own right and to aid our understanding of the complex sources and nature of our concepts of mind, cognition, and psychology, which are all terms with puzzling, difficult histories. These topics are not the domain of specialists alone, and studies of emotion, perception, or reasoning (...) have never been isolated theoretical endeavours. As Francis Bacon described human philosophy or ‘the knowledge of ourselves’, within which he located the study of body, soul, and mind, it ‘deserveth the more accurate handling, by how much it toucheth us more nearly’ (1605/ 2000: 93). The history of ideas in these domains is particularly challenging given the practical dimensions and implications of theories of mind. Because theories of human nature and debates about body and mind do ‘touch us’ so ‘nearly’, they attract and can thus reveal, in specific historical contexts, interconnected discourses or associations which may be quite unlike our own. So there are no neat boundaries around a historical category of ‘seventeenth-century British philosophy of the soul’. The central topic of this chapter can be thought of either as pneumatology, the doctrine or science of spirits and souls, or as continuous with the ‘psychologia’ or psychology of Aristotelian traditions (Park and Kessler 1988; Hatfield 1995: 184-6). In neither case, however, should we expect any deep unity to be provided by history, geography, discipline, or subject-matter. (shrink)

As a practicing life scientist, Descartes must have a theory of what it means to be a living being. In this paper, I provide an account of what his theoretical conception of living bodies must be. I then show that this conception might well run afoul of his rejection of final causal explanations in natural philosophy. Nonetheless, I show how Descartes might have made use of such explanations as merely hypothetical, even though he explicitly blocks this move. I conclude by (...) suggesting that there is no reason for him to have blocked the use of hypothetical final causes in this way. (shrink)

This article situates Descartes’ physical thinking within the nexus of machine science, which rests upon different foundational piers than regular classical mechanics of a Newtonian stripe. In particular, connected cyclic processes of the sort encountered in clockwork mechanisms (and Descartes’ own vortices) become central rather than impactive collisions of any kind. Such a placement supplies a more sympathetic understanding of many of his most notorious claims: conservation of ‘quantity of motion’, relationalism with respect to space, relative rest as an explanation (...) of particle cohesion, etc. Of course, the resulting system of ideas is not perfect, but the mistakes are more subtle than usually presumed. (shrink)

The current antireductionist consensus rests in part on the indefensibility of the deductive-nomological model of explanation, on which classical reductionism depends. I argue that the DN model is inessential to the reductionist program and that mechanism provides a better framework for thinking about reductionism. This runs counter to the contemporary mechanists’ claim that mechanism is an alternative to reductionism. I demonstrate that mechanists are committed to reductionism, as evidenced by the historical roots of the contemporary mechanist program. This view shares (...) certain core commitments with reductionism. It is these shared commitments that constitute the essential elements of the reductionist program. (shrink)

In the two volumes which make up Capitalism and Schizophrenia, Deleuze and Guattari propose new concepts of “machine” and “organism.” The problem of the relationship between machines and organisms has a long philosophical history, and this essay treats their work as a contribution to this debate. It is argued that their solution to this problem is found in their difficult concept of the “body without organs,” a concept that is given some much-needed clarification in the essay. The first section details (...) Deleuze and Guattari’s concept of the machine, examining the ways in which it differs from the traditional concept as described by Canguilhem: their machines do not have predictable movements, but instead produce events; they do not have a purpose; they are able to reproduce themselves. The second section details their conception of the organism through their account of Geoffroy Saint-Hilaire: organisms are bodies which normalize and which create hierarchies; they also do not have a purpose; they have a “unity of composition.” The final section argues that their concept of the “body without organs” shows us how to understand the relation between the two transformed concepts, and defines the body without organs as the becoming-machine of the organism. (shrink)

It is a matter of continuing scholarly dispute whether Descartes offers a metaphysics of the material world that is “monist” or “pluralist.” One passage that has become crucial to this debate is from the Synopsis of the Meditations, in which Descartes argues that since “body taken in general” is a substance, and since all substances are “by their nature incorruptible,” this sort of body is incorruptible as well. In this article I defend a pluralist reading of this passage, according to (...) which there are indefinitely many bodies-taken-in-general, each of which counts as an incorruptible material substance. However, I also consider some surprising features of the argument in the Synopsis. One is that this argument conflicts with the implication in Descartes that any two “really distinct” substances can each exist without the other existing. Another is that the argument tends to undermine his suggestion that there is room at a fundamental metaphysical level for ordinary material objects. (shrink)

Animals – both tame and wild, as metaphors and as real presences – populate many of More’s works. In this essay, I show that, from the early Psychodia Platonica to the Divine Dialogues, animals are at the core of key metaphysical issues that reverberate on the levels of psychology and ethics. In particular I discuss three main aspects: the role of animals in More’s critique of atheism, both as safeguard for the body–soul interaction and as proofs of divine providence in (...) nature; the problem of evil in the universe, and how to justify the existence of ‘evil’ animals in particular; the differentiation between animals and humans, especially on the basis of their respective possibility of attaining happiness. In all three cases, I argue that More attempts to ‘tame’ the nature of animals, and yet that he is aware that ‘animality’ remains partly untamed. (shrink)

In the past decade, several Descartes scholars have gone on record claiming that, for biological purposes, Descartes likely accepts the practical scientific necessity of the existence of “physical natures,” even while his official substance-mode ontology and his characterization of matter in terms of extension do not license the existence of physical natures. In this article, I elaborate on the historical context of Descartes’s biology, the “practical scientific necessity” just mentioned, and argue, contrary to other interpretations, that Descartes does offer a (...) philosophical justification for the existence of physical natures, albeit not by appeal to the categories of substance and mode, or matter as such, but by appeal to our “nature” as a union between mind and body. (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)

Descartes analysed the mind into various faculties or powers, including pure intellect, imagination, senses, and will. This article focuses on his account of the sensory power, in relation to its Aristotelian background. Descartes accepted from the Aristotelians that the senses serve to preserve the body by detecting benefits and harms. He rejected the scholastic Aristotelian sensory ontology of resembling species, or ‘forms without matter’. For the visual sense, Descartes offered a mechanistic ontology and a partially mechanized account of sensory processes, (...) including some previously ascribed to judgement. He did this in the context of his theory of brain signs that prompt sensations. The article contends that Descartes’s use of the sign-relation was modelled on standard discussions of non-resembling signs in commentaries on Aristotle’s De interpretatione. It follows three uses of the sign-relation: brain states that cause colour sensations; brain states that cause experiences of spatialized contents, such as shapes; and brain states that realize a ‘natural geometry’. It argues that Descartes’s natural geometry does not involve mental operations but physiological mechanisms that co-vary with the distance to seen objects. While retaining the language of sensory powers, Descartes offered a partial mechanization of those powers. (shrink)

ArgumentThis article investigates the reasons behind the disappearance of Francis Glisson's theory of irritability during the eighteenth century. At a time when natural investigations were becoming increasingly polarized between mind and matter in the attempt to save both man's consciousness and the inert nature of theres extensa, Glisson's notion of a natural perception embedded in matter did not satisfy the new science's basic injunction not to superimpose perceptions and appetites on nature. Knowledgeofnature could not be based on knowledgewithinnature, i.e., on (...) the very knowledge that nature has of itself; or – to look at the same question from the point of view of the human mind – man's consciousness could not be seen as participating in forms of natural selfhood. Albrecht Haller played a key role in this story. Through his experiments, Haller thought he had conclusively demonstrated that the response given by nature when irritated did not betray any natural perceptivity, any inner life, anysentiment interiéur. In doing so, he provided a less bewildering theory of irritability for the rising communities of experimental physiology. (shrink)

RESUMEN La interpretación habitual de Descartes sostiene que la nueva ciencia cartesiana es resultado del remplazo, en las explicaciones científicas, de las causas finales y formales por las causas eficientes. Si bien dicha afirmación en líneas generales es correcta, se ha tendido a asumir que las causas eficientes no entrañan problema alguno. Este artículo desea cuestionar dicha asunción, poniendo de manifiesto una serie de problemáticas concernientes a la cognoscibilidad de las causas eficientes. ABSTRACT The common interpretation of Descartes argues that (...) the new science is a result of Cartesian replacement, in scientific explanations, of the final and formal causes by the efficient causes. While this statement is broadly correct, it has tended to assume that efficient causes do not imply any problem. This paper wishes to question this assumption, showing a number of problems concerning the knowability of efficient causes. (shrink)

El lenguaje incorporado desde y para la cognición incorporada fundamenta el origen del lenguaje en la evolución de la especie humana y en los contornos de la estructura cerebral actual del hombre. En el cerebro hay continuidad: las áreas sensoriales reciben estímulos, a los que se pone la voz, propio de la especie, y se produce el lenguaje conceptual; sobre esta base se abstrae los términos y se llega a niveles de alta abstracción. Así se da razón que la dimensión (...) lingüística es la facultad que articula lo sustancial de la facultad fonética humana, con los elementos del ambiente. Por lo tanto, se rechaza las explicaciones lingüísticas tanto del internalismo como las del externalismo, que absolutizan sea la facultad o la periferia respectivamente. (shrink)

The concept of teleonomy has been attracting renewed attention recently. This is based on the idea that teleonomy provides a useful conceptual replacement for teleology, and even that it constitutes an indispensable resource for thinking biologically about purposes. However, both these claims are open to question. We review the history of teleological thinking from Greek antiquity to the modern period to illuminate the tensions and ambiguities that emerged when forms of teleological reasoning interacted with major developments in biological thought. This (...) sets the stage for an examination of Pittendrigh’s (Adaptation, natural selection, and behavior. In: Roe A, Simpson GG (eds) Behavior and evolution. Yale University Press, New Haven, pp 390–416, 1958) introduction of “teleonomy” and its early uptake in the work of prominent biologists. We then explore why teleonomy subsequently foundered and consider whether the term may yet have significance for discussions of goal-directedness in evolutionary biology and philosophy of science. This involves clarifying the relationship between teleonomy and teleological explanation, as well as asking how the concept of teleonomy impinges on research at the frontiers of evolutionary theory. (shrink)

Descartes is usually taken to be a strict reductionist, and he frequently describes his work in reductionist terms. This dissertation, however, makes the case that he is a nonreductionist in certain areas of his philosophy and natural philosophy. This might seem like simple inconsistency, or a mismatch between Descartes's ambitions and his achievements. I argue that here it is more than that: nonreductionism is compatible with his wider commitments, and allowing for irreducibles increases the explanatory power of his system. Moreover, (...) Descartes depends on nonreductionist knowledge and on irreducibles in order to maintain his epistemology and metaphysics. That is, there is more in the Cartesian world than mind, matter, and God. (shrink)

In this paper, I join the so-called voluntarism debate on Descartes’s theory of will and judgment, arguing for an indirect doxastic voluntarism reading of Descartes, as opposed to a classic, or direct doxastic voluntarism. More specifically, I examine the question whether Descartes thinks the will can have a direct and full control over one’s suspension of judgment. Descartes was a doxastic voluntarist, maintaining that the will has some kind of control over one’s doxastic states, such as belief and doubt. According (...) to a long-held reading, the control that the will has over doxastic states in Descartes’s theory is direct; the doxastic states are affected by the mere act of will. This reading is called direct doxastic voluntarism (DDV), or direct voluntarism (DV) for short, and it states that we are capable of assenting, rejecting and suspending a judgment based only on our will to do so. Thus, these actions would be utterly and merely volitional. DV can be divided into two further positions, direct positive voluntarism (+DV) and direct negative voluntarism (-DV). Direct positive voluntarism deals with the act of forming judgments, maintaining that one can accept or deny a proposition wilfully and either merely believe or not believe something voluntarily. Direct negative voluntarism deals with the suspension of judgment, maintaining that it can likewise be accomplished by a simple act of will. However, I support an alternate account of Descartes’s voluntarism, which is called indirect doxastic voluntarism (IDV), or indirect voluntarism (IV) for short. By this account, the will is capable of affecting a doxastic state indirectly by making one concentrate on essential tasks for forming that state, such as gathering up and paying attention to strong reasons and evidence. IV is also possible to divide into indirect positive voluntarism (+IV) and indirect negative voluntarism (-IV). Per indirect positive voluntarism the will needs to pay attention to reasons for accepting or denying some proposition. Likewise, by indirect negative voluntarism, in order to suspend judgment the will needs to direct this attention to the reasons for doubt. By attending to these reasons, the will also comes face-to-face with its own freedom. This feeling of freedom can be described as affectivity of the reasons for belief (assent) and doubt (suspension). (shrink)

This chapter considers philosophical problems concerning non-human (and sometimes human) animals, including their metaphysical, physical, and moral status, their origin, what makes them alive, their functional organization, and the basis of their sensitive and cognitive capacities. I proceed by assuming what most of Descartes’s followers and interpreters have held: that Descartes proposed that animals lack sentience, feeling, and genuinely cognitive representations of things. (Some scholars interpret Descartes differently, denying that he excluded sentience, feeling, and representation from animals, and I consider (...) the evidence for these interpretations as well.) Given that Descartes denied any sort of soul to animals, his other philosophical commitments entailed that he must explain the vital and sensitive powers of non-human animals through purely material causes. Indeed, he welcomed this task, for he was engaged in the larger project of providing purely mechanistic explanations for all natural phenomena of the material world. Animal bodies form functional unities that are adapted to environmental circumstances. In his new physics, Descartes sought to discover or hypothesize material mechanisms that would explain the physiological and behavioral capacities of animals, including how they maintain themselves by seeking food and drink, reproduce themselves, and modify their behavior to fit current circumstances. Metaphysically, his new perspective raised the problem of accounting for the functional unity of the animal body considered as a purely material construction, devoid of an active, organizing power such as the sensitive soul. Descartes’s project becomes even more challenging if we ask whence come such mechanisms that are capable of performing the functions of living things. Officially, Descartes endorsed the accepted theological orthodoxy, that God designed and created the bodily mechanisms of humans and animals. However, in his natural philosophy he set himself the task of explaining the origin of animals as part of the natural development of the universe out of an original chaotic soup of material particles. Within this naturalistic perspective, he must explain how, through purely material processes, the functionally organized bodies of living things (plants and animals) could be produced from non-living matter. Without a designing creator, how do animal bodies arise that are capable of digesting food, growing, reproducing, and performing the behaviors needed to preserve life and health? (shrink)

Descartes was born in La Haye (now Descartes) in Touraine and educated at the Jesuit college of La Fleche` in Anjou. Descartes’modern reputation as a rationalistic armchair philosopher, whose mind–body dualism is the source of damaging divisions between psychology and the life sciences, is almost entirely undeserved. Some 90% of his surviving correspondence is on mathematics and scientific matters, from acoustics and hydrostatics to chemistry and the practical problems of constructing scientific instruments. Descartes was just as interested in the motions (...) of matter as in the supernatural soul, and he advised against spending too much time on metaphysical inquiries which neglect imagination and the senses. After meeting the Dutch engineer Isaac Beeckman in 1618, Descartes became committed to a systematically ‘mechanical’account of nature. This involved explaining all natural processes in terms of interactions between microscopic material bodies in motion. Descartes modelled his physics and cosmology on the behaviour of fluids, which also have a distinctive and central role in his physiology: the key processes for natural philosophical investigation are the circulation and mutual displacement of constrained bodies, rather than the isolated collisions of atoms in a void. Descartes settled in Holland in 1628, and commenced an ambitious programme of physiological research. In 1630 he was ‘studying chemistry and anatomy simultaneously’, and in late 1632 he was ‘dissecting the heads of various animals’, in order to ‘explain what imagination, memory, etc. consist in’. By late 1633 Descartes had almost completed L’homme, the Treatise on Man; but he abandoned plans to publish it along with a work on matter theory and optics which relied on Copernican cosmology, after he heard of the condemnation of Galileo. L’homme was published posthumously in 1662 (Latin) and 1664 (French); not until 1972 was it fully translated into English. L’homme draws on many (mostly unnamed) Renaissance medical writers, and covers, firstly, a range of traditional physiological topics, such as digestion and respiration.. (shrink)