Leibniz construit, teste et vérifie sans cesse la pertinence et la cohérence de sa philosophie en la rapportant aux conclusions des autres disciplines. Cette méthode heuristique nourrit son dialogue avec les sciences mathématiques et physiques; moins connus, les enjeux révélés par la réforme moderne de la médecine et la chimie suscitent une interrogation sur la vie et la qualité. Ces sciences expérimentales s'avèrent en effet cruciales pour une philosophie de la nature qui cherche à concilier le mécanisme et le finalisme (...) à travers les concepts d'entéléchie et de monade. Elles obligent en outre à préciser la logique de l'expérience, la fonction de la raison, le statut des principes explicatifs (loi, cause, éléments, analogie). Enfin, elles exigent un fondement qui permette de rapporter les phénomènes organiques à leur véritable origine: la vie. Ce programme se réalise de façon systématique dans la controverse qu'entretiennent Leibniz et Stahl au sujet d'une philosophie de la nature capable de prendre acte des découvertes modernes de la médecine et de la chimie, tout en fondant ces connaissances sur une théorie générale de la substance et de la vie. (shrink)

Georg Ernst Stahl (1659-1734) was a German physician and chemist. The book (in German) documents a symposium of the Academy Leopoldina on his works and thoughts that contributed to the Enlightenment. Der weite Horizont seines Denkens und seiner Arbeiten umfasst die Phlogiston-Theorie der Verbrennung, die später mit der Entdeckung des Sauerstoffs widerlegt wurde, aber dennoch wichtige Erkenntnisse zur Reversibilität von Reaktionen und zur unsichtbaren Persistenz der beteiligten chemischen Komponenten beitrug. Seine Gedanken zur Rolle der „Anima“, die heute überholt (...) erscheinen, führten bereits am Beginn des 18. Jahrhunderts Konzepte ein, die für die moderne Biologie und Psychologie von Bedeutung sind. Dazu zählen etwa Homöostase, Synergie, die Vorbereitung willentlicher Bewegungen und Unterschiede zwischen unbewussten aber vernünftigen Handlungen und solchen, die von rationalen Erwägungen geleitet werden. Stahls medizinisches Hauptwerk ist die „Theoria medica vera”, Halle 1708. Eine der zentralen Publikationen zur chemischen Theorie der Verbrennung ist die „Zymotechnia fundamentalis seu fermentationis theoria generalis”, Halle 1697, in deutscher Sprache 1734. Siehe auch „Georg Ernst Stahl (1659-1734), German Physician and Chemist“, Artikel von A. Gierer, in: Encyclopedia of the Enlightenment (Hg. A.C. Kors), Bd. 4, Oxford University Press, New York 2003, S. 124-125. -/- . (shrink)

Le Obiezioni contro la Teoria medica di G.E. Stahl, tradotte per la prima volta in italiano, rappresentano un documento di particolare interesse storico-filosofico. Da una parte Georg Ernst Stahl (1659-1734), medico, chimico, fisico, sostenitore di una fisiologia corporea a impronta “vitalista” e dall’altra Gottfried Wilhelm Leibniz (1646-1716), genio universale della matematica e della filosofia dell’età barocca. Il fulcro della polemica riguarda la possibilità di capire se e in che misura l’organizzazione meccanica di un corpo organico sia di (...) per se sufficiente a spiegare il fenomeno della vita “biologica”, o se invece si debba postulare la presenza di princìpi vitali capaci di integrare le leggi fisiologiche che strutturano la corporeità. A dispetto della lontananza storica, o anzi forse proprio in virtù di tale lontananza, la polemica tra Leibniz e Stahl ci aiuta a decifrare le radici di uno dei refrain più abusati di tanta filosofia contemporanea, il tema cioè della ‘naturalizzazione’ della vita e dello spirito. L’idea di espungere tutti gli elementi “soprannaturali” (l’anima, gli spiriti, etc.) dal novero delle spiegazioni scientifiche non è certo un’idea novecentesca e si confronta in questo caso non solo con la sua tesi opposta, ma soprattutto con una vasta gamma di soluzioni intermedie e di varianti non riduzioniste, di cui proprio la filosofia di Leibniz è uno splendido esempio. Il volume è accompagnato da un saggio di postfazione intitolato Vita e organismo tra filosofia e medicina: le ragioni di una polemica. (shrink)

This paper examines Georg Ernst Stahl's first book, the Zymotechnia Fundamentalis, in the context of contemporary natural philosophy and the author's career. I argue that the Zymotechnia was a mechanical theory of fermentation written consciously against the influential "fermentational program" of Joan Baptista van Helmont and especially Thomas Willis. Stahl's theory of fermentation introduced his first conception of phlogiston, which was in part a corpuscular transformation of the Paracelsian sulphur principle. Meanwhile some assumptions underlying this theory, such (...) as the composition of matter, the absolute passivity of matter and the "passions" of sulphur, reveal the combined scholastic and mechanistic character of Stahl's natural philosophy. In the conclusion I show that Stahl's theory of fermentation undermined the old fermentational program and paved the way for his dualist vitalism. (shrink)

This essay focuses on the structure of agency in Georg Ernst Stahl's model of organic order and the role that it plays for the difference between living and non-living beings in the discourses of medicine and natural history around 1700. Stahl calls the order of organic beings an "organism". He characterizes the "organism" through the notions of tonic movement, energy and ratio. The tonic movement is a mechanism of contraction and relaxation of organic units to direct fluids (...) to certain parts of the body; the energy represents a certain, limited potential of the living body to act spontaneously and to react if it is irritated; and the ratio expresses the logic of a processual, directed order imposed on corporeal dispositions. This ratio inheres in natural agents. However, to establish his theory of agency, Stahl first analyzes the irregular blood movements that characterize diseases. The capacity of the organic body to change these movements and to heal itself in redirecting them, leads him to the assumption that such bodies can regulate their own order and that self-regulation requires an autonomous agent. (shrink)

The subject of this paper is Georg Ernst Stahl's reflections on epilepsy. In the German physician's work, the concept of disease is stratified: it is the morbid idea which causes dysfunctions in the animal economy, as well as irregular motion, overabundance and ultimately an alteration of the corporeal humours. In particular, epilepsy is an affection deriving from an altered functioning of the bodily motions, caused by abnormal blood flow, intestinal worms, anatomical defects, foreign bodies, and the passions of (...) the soul. While a certain medical tradition attributed a nervous origin to epilepsy, Stahl, giving it a humoural genesis, openly shows the theoretical premises on which his physiology rests. So, Stahlian physiology appears to be a non-mechanistic, teleological-inspired, hydraulicism. (shrink)

. The subject of this paper is Georg Ernst Stahl's reflections on epilepsy. In the German physician's work, the concept of disease is stratified: it is the morbid idea which causes dysfunctions in the animal economy, as well as irregular motion, overabundance and ultimately an alteration of the corporeal humours. In particular, epilepsy is an affection deriving from an altered functioning of the bodily motions, caused by abnormal blood flow, intestinal worms, anatomical defects, foreign bodies, and the passions (...) of the soul. While a certain medical tradition attributed a nervous origin to epilepsy, Stahl, giving it a humoural genesis, openly shows the theoretical premises on which his physiology rests. So, Stahlian physiology appears to be a non-mechanistic, teleological-inspired, hydraulicism. (shrink)

ABSTRACT While Joseph Hooker was considering his upcoming presentation on the geographical distribution of species, he asked Charles Darwin for help with some references. During the ensuing exchange of correspondence, Darwin seems to have contradicted himself, regarding his being aware of Leopold von Buch’s observation that distributed varieties become species, prior to writing On the Origin of Species. Literalists and conspiracists have interpreted this apparent self-contradiction as a sign of duplicity and fraud. However, when the correspondence and Hooker’s address (...) are analysed in context, there is a more compelling explanation. Simply that, in response to direct questioning by Hooker, Darwin conflated the two names of Von Baer and Von Buch, and made an honest mistake. (shrink)

This essay focuses on an unknown Latin translation of Georg Ernst Stahl's treatise on the nature of sulfur (Zufällige Gedancken und Nützliche Bedencken über den Streit von dem so genannten Sulfure). The original edition, published in 1718, laid the foundation for the phlogiston theory, which dominated European chemistry until the early 1770s. However, the dissemination of the treatise on sulfur outside the German states remained limited. Its Latin translation proposes a different scenario as it was owned by three (...) prominent French chemists: Étienne-François Geoffroy, Jean Hellot and Antoine-Laurent Lavoisier. Geoffroy's early interest in Stahl's chemistry has been evidenced and it is suggested that the acquisition of the manuscript might be linked to his connection with Stahl through Caspar Neumann, a chemist from Berlin. When he entered in the possession of the manuscript Jean Hellot wrote a long excerpt of Stahl’s work. Lavoisier acquired the manuscript in 1766, and his critical reading of Stahl's work significantly influenced his own effort to outline a new theory of combustion. This manuscript represents a significant historical connection between Stahl’s phlogiston theory and Lavoisier's revolutionary ideas. (shrink)

_The first unabridged English translation of the correspondence between Gottfried Wilhelm Leibniz and Georg Ernst Stahl detailing their opposing philosophies_ The correspondence between the eighteenth-century mathematician and philosopher G. W. Leibniz and G. E. Stahl, a chemist and physician at the court of King Friedrich Wilhelm I of Prussia, known as the Leibniz-Stahl Controversy, is one of the most important intellectual contributions on theoretical issues concerning pre-biological thinking. Editors François Duchesneau and Justin E. H. Smith offer (...) readers the first fully annotated English translation of this fascinating exchange of philosophical views on divine action, the order of nature, causality and teleology, and the soul-body relationship. (shrink)

La vieillesse constitue une pierre de touche pour toute théorie médicale : elle oblige à rendre raison de la temporalité à l’œuvre dans la vie. Aux yeux de Stahl, les iatromécaniciens méconnaissent la dimension temporelle de l’organisme ; en particulier, ils en ignorent la périodicité. Comprendre la vieillesse suppose donc la critique de la représentation linéaire du temps organique, que développe la mécanique et qui réduit le vivant au seul composé physique et chimique. Il reste alors à trouver la (...) cause de la périodicité organique : sur ce point, Georg Ernst Stahl critique Thomas Sydenham, qui reconnaît certes la périodicité du vivant mais nie la possibilité d’une médecine étiologique. Pour sa part, le médecin de Halle cherche à rendre compte du vieillissement en lien avec les actions organiques fondamentales : le tonus, la circulation, l’excrétion, la sécrétion. (shrink)

À l'orée du xvme siècle, Wilhelm Gottfried Leibniz et Friedrich Hoffmann critiquent la théorie médicale de Georg Ernst Stahl. Ils trient le vrai du faux. En l'occurrence, ils reprennent à leur compte la définition stahlienne de la respiration en l'extirpant de ses fondements animistes pour la placer dans une épistémologie soumise au principe de raison suffisante et au modèle mécanique. La découverte stahlienne consiste à penser la respiration comme ventilation calorifique à l'encontre de la conception antique ; les (...) iatromécaniciens reconnaissent la justesse de la notion stahlienne, ils essaient alors de la transposer dans un modèle mécanique de la ventilation. Cette reprise dans un contexte épistémologique différent implique une analyse critique de l'idée de découverte« vraie» dans son contenu, mais « fausse» dans ses hypothèses. Elle oblige en outre à interroger l'épistémologie de la connaissance médicale, en tant que science et thérapeutique, et ses liens avec les autres disciplines. En effet, si Leibniz philosophe et Hoffmann médecin prennent au sérieux la théorie animiste de Stahl, c'est que l'importance de ses découvertes met en cause les fondements de la médecine. (shrink)

In the second preface to the Critique of Pure Reason, Kant claims that Galileo Galilei, Evangelista Torricelli and Georg Ernst Stahl caused a scientific revolution in experimental physics (B xii). In this paper, I advance the historical thesis that Kantʼs claim refers precisely to three passages from Discursus et demonstrationes mathematicae (Galilei), Lettera a Filaleti Di Timauro Antiate (Torricelli), and Beweiß von den Saltzen (Stahl). This historical thesis provides evidence for a newer systematic interpretation, which says that (...) the topic of the second preface is not epistemological, but rather methodological. (shrink)

The theory of living beings as machines of nature and the conception of composite substances endowed with conjoined souls, entelechies, or monads, as well as that of organic bodies, were solidified over the course of the transformations of Leibniz's thought that issued in the New System of Nature. On this basis, the monadological versions of a system of nature centered upon the integrated organization ad infinitum of living beings were gradually articulated. Leibniz aimed to spell out a science, or physiology (...) of vital processes, that would be, as much as possible, in agreement with the epistemological exigencies of the complex metaphysical model that he had elaborated. On the one hand, Leibniz offers a critical evaluation of the methodological options that divide the allegiances of the physicians and naturalists who are his contemporaries; what is more, he determines the profile of the analyses and explications that are to be promoted. For This double preoccupation translates into the scientific exchanges and correspondences that accompany the construction of the theory of organic bodies as constituents of machines of nature. The author focuses on the particular case of the propositions concerning the science of the living that stem from his reaction to the work of Georg Ernst Stahl. (shrink)

_The first unabridged English translation of the correspondence between Gottfried Wilhelm Leibniz and Georg Ernst Stahl detailing their opposing philosophies_ The correspondence between the eighteenth-century mathematician and philosopher G. W. Leibniz and G. E. Stahl, a chemist and physician at the court of King Friedrich Wilhelm I of Prussia, known as the Leibniz-Stahl Controversy, is one of the most important intellectual contributions on theoretical issues concerning pre-biological thinking. Editors François Duchesneau and Justin E. H. Smith offer (...) readers the first fully annotated English translation of this fascinating exchange of philosophical views on divine action, the order of nature, causality and teleology, and the soul-body relationship. (shrink)

This book explores how and when biology emerged as a science in Germany. Beginning with the debate about organism between Georg Ernst Stahl and Gottfried Leibniz at the start of the eighteenth century, John Zammito traces the development of a new research program, culminating in 1800, in the formulation of developmental morphology. He shows how over the course of the century, naturalists undertook to transform some domains of natural history into a distinct branch of natural philosophy, which attempted (...) not only to describe but to explain the natural world and became, ultimately, the science of biology. (shrink)

From Leibniz and Georg Ernst Stahl to Albrecht von Haller, Germans of the eighteenth century calved off an experimental physiology from medicine and made this research a centerpiece of their new model university, first under Haller at Göttingen, then under von Humboldt at Berlin. Haller made Göttingen the most important center for the advancement of Enlightenment science in Germany, but that is not where Johann Herder went looking for new ideas in psychology, turning instead to France, avidly studying (...) Condillac and Diderot, and meeting the latter in Paris in 1769. Herder wanted to use French psychology in his theory of how the history of art recapitulates the development of the senses. To work out his ideas he found it necessary to ignore Kant's careful distinction between life and matter. Kant made life an inexplicable boundary for mechanical explanation, though with Herder it became the key concept for interpreting nature. That all the forces in the physical world are held to express one organizing, integrating vital principle is what excited Goethe about Herder's work and provoked the Naturphilosophie that Schelling invented at this time in close collaboration with Goethe. (shrink)

In the controversy that arose between Gottfried Wilhelm Leibniz and Georg Ernst Stahl following the publication of the latter’s Theoria medica vera, both theoreticians strove to distance themselves from what they took to be the classical conception of the vegetative soul, while relating and partly reducing their opponent’s doctrine to it. I shall first attempt to establish their respective meanings for such a soul and the reasons why they would challenge the relevance of that notion for physiology. I (...) shall then try to show how they nevertheless integrated explanatory functions equivalent to those attributed to that metaphysical entity into the theoretical frameworks they proposed and favoured. As a consequence of alternative interpretations of this kind, eighteenth-century physiologists will tend to link vegetative life either with “organic mechanism” or with various kinds of “vital principle,” akin to Stahl’s anima. (shrink)

Rahel Jaeggi argues that forms of life ought to be the main reference point for a critical theory of society because the internal normative structure of life forms allows for immanent critique. In this article, I extend her model by systematically considering the possibility of oppressive forms of life. Oppressive forms of life are clusters of practices in which subordinated groups are systematically excluded or disabled from participating in the social processes of interpretation through which the values and purposes of (...) those very practices are determined. The possibility of oppressive forms of life poses a challenge to the method of immanent critique because it seems that any such critique must rely on immanent norms that are at least partly constituted by interpretations and that can therefore be distorted by oppression. I argue that Jaeggi’s model of immanent critique can be extended to respond to that challenge, either by recovering a constitutive form of freedom within all forms of life or by consciously adopting a partisan stance in favour of oppressed and marginalised self-understandings. (shrink)

When we criticize social institutions and practices, what kinds of reasons can we offer for such criticism? Political philosophers often assume that we must rely on universal moral principles that are not necessarily connected to the particular social practices of our communities. Traditionally,continental critical theory has rejected this claim through its endorsement of the method of immanent critique. Immanent critique is a critique of social practices that draws on norms already present within these practices to demand social change, rather than (...) merely conservatively reproducing them. This book defends the claim that such a critique is not only possible, but also has politically powerful potential. Taking up recent developments in analytic collective intentionality theory and in the philosophy of language, the book argues that all social practices rest on structures of mutual recognition between persons that allow social theorists to reconstruct hidden norms present within these practices. Starting from a comprehensive critique of contemporary critical theory, the book also spells out the consequences of this line of thought for the practice of social critique, for the social sciences and for political philosophy. (shrink)

ArgumentIn this essay, I sketch a problem-based framework within which I locate the concept of “organism” in the system theories of Georg Ernst Stahl, Théophile Bordeu, and Paul-Joseph Barthez. Around 1700, Stahl coins the word “organism” for a certain concept of order. For him, the concept explains the form of order of living bodies that is categorically different from the order of other bodies or composites. At the end of the century, the “organism” as a specific form (...) of order becomes a major topos in many discourses. I will not so much focus on experiments and objects as on basic problems that contribute to the general framework of the concept of organism as a key concept of the vitalist movement between 1700 and 1800. For this purpose, I will investigate the combination of three explanatory tools. These tools refer to regulating agents, functional interactions, and stimulus-reactions-schemes within individual organic systems of forces. They are related to various themes – especially to energy, sensibility, and sympathy. I will retrace some aspects of these relations. (shrink)

The link between the right to privacy and the right to democratic self-determination is often understood to imply that privacy rights have only instrumental value for democratic participation, and that they consist solely in the possibility to retreat from participation in a public. I examine three arguments for an internal link between both sets of rights: The right to privacy protects political public spheres from epistemic inequality, it protects groups in public from a loss of their deliberative autonomy and it (...) blocks the colonisation of deliberative publics by strategic action orientations. These arguments suggest a genuine political purpose of the right to privacy. (shrink)

Purpose– The purpose of this paper is to provide a response to Christiansen's paper, Ellen Christiansen “From ‘ethics of the eye’ to ‘ethics of the hand’ by collaborative prototyping”,Journal of Information, Communication and Ethics in Society, Vol. 12 No. 1.Design/methodology/approach– Reflection and critique of Christiansen's position.Findings– The paper raises questions about the conceptual basis, the realisation of participation and the conditions required for participative practice to be more broadly employed.Originality/value– It is an original response.

In verschiedenen philosophischen Traditionen findet sich die These, dass Haltungen der Anerkennung eine zentrale Rolle für die Existenz von sozialen Institutionen spielen. Der Artikel gibt einen kurzen Überblick über zentrale anerkennungstheoretische Modelle in der Sozialontologie.

In Morality and Socially Constructed Norms, Laura Valentini argues that moral obligations to respect social norms can be explained without invoking the concept of ‘joint commitment.’ Her resulting account is, in one important sense, individualistic, and therefore struggles to account for widely held intuitions about the normative significance of social norms. I argue that we can rescue the notion of joint commitment from Valentini’s objections, and incorporate it into a version of her account that preserves its insights.

This paper discusses recent evidence that violations of core knowledge offer special learning opportunities for infants and young children. Children make predictions about the world from the youngest ages. When their fail to match observed data, they show an enhanced drive to seek and retain new information about entities that violated their expectations. Finally, the authors draw comparisons between children and adults, and with other species, to explore how surprise shapes thought more broadly.

Given the apparent nondisplaceability and noncancellability of the derogatory content of slurs, it may appear puzzling that non-derogatory uses of slurs exist. Moreover, these uses seem to be in general available only to in-group speakers, thereby exhibiting a peculiar kind of context-sensitivity. In this paper the author argues that to understand non-derogatory uses we should consider slurs in terms of the kind of social practice their uses instantiate. A suitable theory of social practices has been proposed by McMillan. In typical (...) uses the practice is one of bigotry and discrimination. Non-derogatory uses are only possible to the extent that they consitute acts of an alternative, non-derogatory practice. In the core cases it must be a subversive practice of satire or reappropriation. The social identity of speakers is not an ultimately decisive factor but it is an important constitutive condition: most non-derogatory practices of slur-use can only be performed by a member of the target group. (shrink)

Consciousness and Qualia is a philosophical study of qualitative consciousness, characteristic examples of which are pains, experienced colors, sounds, etc.

Computer-based design environments for skilled domain workers have recently graduated from research prototypes to commercial products, supporting the learning of individual designers. Such systems do not, however, adequately support the collaborative nature of work or the evolution of knowledge within communities of practice. If innovation is to be supported within collaborative efforts, thesedomain-oriented design environments (DODEs) must be extended to becomecollaborative information environments (CIEs), capable of providing effective community memories for managing information and learning within constantly evolving collaborative contexts. In (...) particular, CIEs must provide functionality that facilitates the construction of new knowledge and the shared understanding necessary to use this knowledge effectively within communities of practice. (shrink)

Leopold first discusses the conservation of natural resources in the southwestern United States in economic tenns, stressing, in particular, erosion and aridity. He then concludes his analysis with a discussion of the moral issues involved, developing his general position within the context of P. D. Ouspenky’s early philosophy of organism.

Traditional explanations of multistable visual phenomena (e.g. ambiguous figures, perceptual rivalry) suggest that the basis for spontaneous reversals in perception lies in antagonistic connectivity within the visual system. In this review, we suggest an alternative, albeit speculative, explanation for visual multistability – that spontaneous alternations reflect responses to active, programmed events initiated by brain areas that integrate sensory and non-sensory information to coordinate a diversity of behaviors. Much evidence suggests that perceptual reversals are themselves more closely related to the expression (...) of a behavior than to passive sensory responses: (1) they are initiated spontaneously, often voluntarily, and are influenced by subjective variables such as attention and mood; (2) the alternation process is greatly facilitated with practice and compromised by lesions in non-visual cortical areas; (3) the alternation process has temporal dynamics similar to those of spontaneously initiated behaviors; (4) functional imaging reveals that brain areas associated with a variety of cognitive behaviors are specifically activated when vision becomes unstable. In this scheme, reorganizations of activity throughout the visual cortex, concurrent with perceptual reversals, are initiated by higher, largely non-sensory brain centers. Such direct intervention in the processing of the sensory input by brain structures associated with planning and motor programming might serve an important role in perceptual organization, particularly in aspects related to selective attention. (shrink)