Spinoza: Natural Philosophy

This paper argues that, contrary to what one might think, early modern rationalism displays an increasing and well-grounded sensitivity to certain metaphysical questions the substantial form was designed to answer – despite the fact that the notion itself was in such disrepute, and emphatically banished from natural philosophy. This main thesis is established by examining the thought of Descartes, Spinoza, and Leibniz through the framework constituted by what have been designated as the two aspects, metaphysical and physical, of the substantial (...) form. This examination shows that Descartes ends up assigning the soul a notable metaphysical task formerly assigned to the substantial form, whereas Spinoza advances a theory of essences motivated by the philosophical concerns behind the two aspects of the substantial form. Leibniz finally makes a sharp distinction between natural philosophy and metaphysics as he develops a dynamistic theory that deliberately aims at understanding the substantial form in a new fashion. This line of development is designated as one major factor contributing to the separation of philosophy and natural science. -/- . (shrink)

The philosophy of Spinoza can hardly be said to have been in the fore-front of recent developments in the philosophy of mind. Notwithstanding, Stuart Hampshire has put himself on record as saying “that in the philosophy of mind he [Spinoza] is nearer to the truth at certain points than any other philosopher ever has been.” The purpose of this paper is to get even nearer the truth with Spinoza’s leading. The idea of the body is, however, a confused idea; so (...) confused, in fact, that Spinoza was never able to form an adequate idea of the idea. I wish to argue that Spinoza has even worse reasons than Descartes for taking the idea of the body to be the idea of something that “actually exists.” Lacking any appeal to the divine veracity, Spinoza’s contention that the body does exist constitutes a standing petitio for the whole of the philosophy of mind. (shrink)

In this paper, I discuss Spinoza on the proper methods and content of physical science. I start by showing how Spinoza's epistemology leads him to a kind of pessimism about the prospects of empirical and mathematical methods in natural philosophy. While they are useful for life, they do not tell us about nature, as Spinoza puts it, “as it is in itself.” At the same time, Spinoza seems to allow that we have some knowledge of physical things and their behavior. (...) So I go on to outline and critique a few of the accounts of how Spinoza thinks we can do this, focusing on the role of the common notions in physics. In the third section, I discuss the possible contents of physics, for Spinoza, and argue that they are not, as is usually thought, fundamentally Cartesian. I conclude by pointing to some promising directions for future research and suggesting a few heuristics for such research. (shrink)

ALBERT EINSTEIN’S CONNECTIONS WITH SPINOZA’S PHILOSOPHY The paper aims to analyze the influence of Baruch Spinoza’s philosophy on Albert Einstein’s work, in particular his physics. Einstein was a man of genius personality of contemporary physics, but we can see him as a prominent philosopher, too. He studied the philosophical works of Kant, Leibniz, Hume and other modern philosophers. But his most preferred thinker was Baruch Spinoza. Einstein knew very well Spinoza’s main book, Ethics. He accepted Spinoza’s concepts of human being (...) and the dignity of man in the history of the world. The concept of God proposed by the author of Ethics was very important for Einstein. Spinoza’s inspiring philosophy is present in Einstein’s vision of the universe and in his deterministic view on quantum mechanics. This problem is reflected in the paper too. Keywords: BARUCH SPINOZA, ALBERT EINSTEIN, CONTEMPORARY PHYSICS, UNIVERSE. (shrink)

An accurate analysis of the text shows that the small treatises have a logical structure and a style which is in all aspects unspinozistic. The main points of difference are : a formalistic interpretation of mathematics‚ the opposition between mathematics and physics‚ slavish cartesianism‚ the presence of numerous pleonasms‚ carelessness of expression‚ parade of learning‚ prolixity‚ attention for irrelevant qualities of authors quoted‚ educational purpose. Together with De Vet’s demonstration that the author of SRR and RK is still alive in (...) 1693 (see Tijdschr. v. Filosofie 45‚ 1983) these arguments force us‚ to consign Spinoza’s authorship‚ recently still defended by Petry a.o.‚ to the realm of fancy. (shrink)

Gravity was a major theme in the seventeenth century scientific discussion. Trendsetters in the renewal of natural science were Galilei and Descartes. The first required a unified theory of all phenomena of gravity ; the second provided one with his vortex-hypothesis, which explained gravity by the mechanical push of subtile bodies of the vortex. This conception was tested and generally followed by Christiaan Huygens, whereas Newton presented the laws of the so called 'attraction' by which he did not at all (...) indicate the causes of those laws of motion. Spinoza comes on the scene of polemics as a critical Cartesian. Motion (of which downward motion of heavy bodies is only one instance) was explained by Descartes, but not so the rest of bodies or the equilibrium in the power relation between opposite forces, neither the reason why in some cases the particles form a hard body. Full fledged mechanism and consistent determinism lead Spinoza to account for rest and solidity in the same way, namely by means of the pressure of small and mostly unvisible bodies in the whirling environment. This paradoxical law was acknowledged as a real and important contribution to physical science by the Dutch spinozistic Cartesians Cuffeler and Overkamp, by the mathematician De Volder, by Spinoza's younger friend Tschirnhaus and in France by Malebranche. By the end of the century it was quite normal to speak about „the gravity of the air” and to consider the gravity of gross bodies as an illusion. (shrink)

Spinoza’s Principles of Cartesian Philosophy is often presented simply as an interpretation of Descartes’ Principia that does not reveal anything significant about Spinoza’s philosophy and its development. This paper, however, shows that Spinoza altered Descartes’ text in a way congruent with what he would later write in his Theological Political Treatise and the Ethics. More precisely, this paper concentrates not on what Spinoza added to Descartes’ texts but on how he presented them. The paper furthermore examines questions that were obviously (...) important for Descartes but absent in Spinoza’s interpretation. Finally, this paper examines two concrete examples to show that Spinoza’s adaptations function as an unmasking of Descartes’ physics. (shrink)

This chapter argues that the standard conception of Spinoza as a fellow-travelling mechanical philosopher and proto-scientific naturalist is misleading. It argues, first, that Spinoza’s account of the proper method for the study of nature presented in the Theological-Political Treatise (TTP) points away from the one commonly associated with the mechanical philosophy. Moreover, throughout his works Spinoza’s views on the very possibility of knowledge of nature are decidedly sceptical (as specified below). Third, in the seventeenth-century debates over proper methods in the (...) sciences, Spinoza sided with those that criticized the aspirations of those (the physico-mathematicians, Galileo, Huygens, Wallis, Wren, etc) who thought the application of mathematics to nature was the way to make progress. In particular, he offers grounds for doubting their confidence in the significance of measurement as well as their piece-meal methodology (see section 2). Along the way, this chapter offers a new interpretation of common notions in the context of treating Spinoza’s account of motion (see section 3). (shrink)

I outline Spinoza’s development of the concept of conatus in the Ethics, and attempt to define its role in his metaphysics. In light of this, I critique the theory based on the identification by modern physics of certain radioactive substances, e.g., curium. These substances, I argue, are by definition unstable individuals whose essences include finite durations (half-lives). As such, they are in direct contradiction to Spinoza’s metaphysics. I then advance and critique several defenses Spinoza might make for his theory of (...) conatus. (shrink)

The chapters of the book do not situate Spinoza among the natural philosophical giants who opened the way to modern science. Rather they explore Spinoza's relation to the sciences in a variety of ways. Contributors: Joseph Agassi, Thomas Cook, Marjorie Grene, Hans Jonas, André Lecrivain, Genevieve Lloyd, Alexandre Matheron, Nancy Maull, Debra Nails, Michel Paty, Richard H. Popkin, David Savan, Heine Siebrand, and Joe D. Van Zandt.

In the early modern period, laws of nature underwent two re markable changes: first, their role in science and philosophy was greatly expanded as they became central to investigation and explanation; and second, ontology (are the laws “real” or not?) and induction emerged as far and away the most important problems of interpretation. The dramatic expansion in the variety of the laws and their range of application, together with the emergence of ontology and induction as (the) paramount problems of interpretation, (...) so revolutionized thinking about such laws that it is hard for us, nowadays, to conceive of them in any other terms. For both historical and philosophical reasons, however, it is important that we try: historical, because as a matter of fact philosophers and scientists did not always conceive of laws of nature as we do today; philosophical, because there are ways of conceiving of the laws, different from the dominant conception nowadays, which, if properly attended to, might prove instructive. (shrink)

Suicide or self-destruction means in ordinary language “the act of killing oneself deliberately” (intentionally or on purpose). Indeed, that’s what we read in the Oxford dictionary and the Oxford dictionary of philosophy , which seems to be confirmed by the etymology of the term “suicide”, a term introduced around mid-17th century deduced from the modern Latin suicidium, ‘act of suicide’. Traditionally, suicide was regarded as immoral, irreligious and illegal in Western culture. However, during the 17th century this Christian view started (...) to change as a consequence of the rise of modern science . Generally speaking, Spinoza does not write much on death. His name does even not occur in the Oxford Philosophy of Death, although he had had very particular ideas on the nature of death. However, he even had much more particular ideas on suicide. Moreover, he states in the fourth proposition of the third part of his masterpiece, the Ethics, that self-destruction is simply impossible: Nulla res, nisi à causâ externâ, potest destrui. (shrink)

This essay considers Spinoza’s responses to two questions: what is responsible for the variety in the physical world and by what mechanism do finite bodies causally interact? I begin by elucidating Spinoza’s solution to the problem of variety by considering his comments on Cartesian physics in an epistolary exchange with Tschirnhaus late in Spinoza’s life. I go on to reconstruct Spinoza’s unique account of causation among finite bodies by considering Leibniz’s attack on the Spinozist explanation of variety. It turns out (...) that Spinoza’s explanations of the variety of bodies, on the one hand, and of causation among finite bodies, on the other, generate a tension in his system that can only be resolved by taking Spinoza to employ two notions of “existence.” I conclude by offering evidence that this is in fact what Spinoza does. (shrink)

In this essay, the author sets out the question: where bodies move according to Spinoza's physical thought? The question is linked to another one Oldenberg asked him then, about how objects acquire their unique individuality and the way nature behaves as a unit, despite the complexity of its constitution. The response refers not only to Spinoza's criticism to Cartesian mechanics, as usual, but will appeal to Spinoza's own interpretation, consistent with his system, about the constitution and dynamics of the physical (...) world, in terms of a mechanic interaction between bodies, firm enough to accomplish the task for which it was designed. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Spinoza and the Theory of Organism HANS JONAS I CARTESIANDUALISMlanded speculation on the nature of life in an impasse: intelligible as, on principles of mechanics, the correlation of structure and function became within the res extensa, that of structure-plus-function with feeling or experience (modes of the res cogitans) was lost in the bifurcation, and thereby the fact of life itself became unintelligible at the same time that the explanation (...) of its bodily performance seemed to be assured. The impasse became manifest in Occasionalism : its tour de force of an extraneous, divine "synchronization" of the outer and the inner world (the latter denied to animals) not only suffered from its extreme artificiality, the common failing of such ad hoc constructions, but even at so high a cost failed to accomplish its theoretical purpose by its own terms. For the animal machine, like any machine, raises beyond the question of the "how" that of the "what for" of its functioning---of the purpose for which it had thus been constructed by its maker.1 Its performance, however devoid of immanent teleology, must serve an end, and that end must be someone's end. This end may (directly) be itself, as indeed Descartes had implied when declaring self-preservation to be the effect of the functioning of the organic automaton. In that case the existence as such of the machine would be its end--either terminally, or in turn to benefit something else. In the former case, the machine would have to be more than a machine, for a mere machine cannot enioy its existence. But since, by the rigorous conception of the res extensa, it cannot be more than a machine, its function and/or existence must serve something other than itself. Automata in Descartes ' time were mainly for entertainment (rather than work). But the raison d'etre of the living kingdom could not well be seen in God's indulging his mechanical abilities or in the amusement of celestial spectators--especially since mere complexity of arrangement does not create new quality and thus add something to the unrelieved sameness of the simple substratum that might enrich the spectrum of being. For quality, beyond the primitive determinations of the extended per se, is the subjective creature of sensation, the confused representation of quantity in a mind; and thus organisms cannot harbor it because as mere machines they lack mentality, and pure spirits cannot because they lack sensuality, or the privilege of confusion and thereby of illusion with its possible enjoyment. And as to their intellectual enjoyment, even that, deprived of the thrill of discovery by the same token, would pale in the contemplation of what to sufficiently large The concept of "machine," adopted for its strict confinementto efficientcause, is still a finalisticconcept,even thoughthe final cause is no longer internal to the entity, as a mode of its own operation,but external to it as antecedent design. [43] 44 HISTORY OF PHILOSOPHY intellects is nothing but the ever-repeated exemplification of the same few, elementary (and ultimately trivial) truths. There remained, then, the time-honored--Stoic as well as Christian--idea that plants and animals are for the benefit of Man. Indeed, since the existence of a living world is the necessary condition for the existence of any of its members, the self-justifying nature of at least one such member (= species) would justify the existence of the whole. In Stoicism, Man provided this end by his possession of reason, which makes him the culmination of a terrestrial scale of being that is also self-justifying throughout all its grades (the end as the best of many that are good in degrees) ; in Christianity, by his possession of an immortal soul, which makes him the sole imago Dei in creation (the end as the sole issue at stake) ; and Cartesian dualism radicalized this latter position by making man even the sole possessor of inwardness or "soul" of any kind, thus the only one of whom "end" can meaningfully be predicated as he alone can entertain ends. All other life then, the product of physical necessity, can be considered his means. However, this traditional idea, in its anthropocentric vanity never a... (shrink)

Traditionally, the so-called ‘redintegration experiment’ is at the center of the comments on the supposed Boyle/Spinoza correspondence. A. Clericuzio argued (refuting the interpretation by R.A. & M.B. Hall) in his influential publications that, in De nitro, Boyle accounted for the ‘redintegration’ of saltpeter on the grounds of the chemical properties of corpuscles and did not make any attempt to deduce them from the mechanical principles. By contrast, this paper claims that with his De nitro Boyle wanted to illustrate and promote (...) precisely his new Corpuscular or Mechanical Philosophy, and that he did significant attempts to explain the phenomena in terms of mechanical qualities. Boyle had borrowed the ‘redintegration experiment’ from R. Glauber and used it as a tool to prove that his philosophy was the right alternative for the Peripatetic and Paracelsian theory of qualities of bodies. Consequently, Clericuzio’s characterization of the Boyle/Spinoza controversy as a discussion between a strict mechanical philosopher and a chemist is problematic and should be revised. (shrink)

Suicide or self-destruction means in ordinary language “the act of killing oneself deliberately” (intentionally or on purpose). Indeed, that’s what we read in the Oxford dictionary and the Oxford dictionary of philosophy , which seems to be confirmed by the etymology of the term “suicide”, a term introduced around mid-17th century deduced from the modern Latin suicidium, ‘act of suicide’. Traditionally, suicide was regarded as immoral, irreligious and illegal in Western culture. However, during the 17th century this Christian view started (...) to change as a consequence of the rise of modern science . Generally speaking, Spinoza does not write much on death. His name does even not occur in the Oxford Philosophy of Death, although he had had very particular ideas on the nature of death. However, he even had much more particular ideas on suicide. Moreover, he states in the fourth proposition of the third part of his masterpiece, the Ethics, that self-destruction is simply impossible: Nulla res, nisi à causâ externâ, potest destrui. (shrink)

This essay considers Spinoza’s responses to two questions: what is responsible for the variety in the physical world and by what mechanism do finite bodies causally interact? I begin by elucidating Spinoza’s solution to the problem of variety by considering his comments on Cartesian physics in an epistolary exchange with Tschirnhaus late in Spinoza’s life. I go on to reconstruct Spinoza’s unique account of causation among finite bodies by considering Leibniz’s attack on the Spinozist explanation of variety. It turns out (...) that Spinoza’s explanations of the variety of bodies, on the one hand, and of causation among finite bodies, on the other, generate a tension in his system that can only be resolved by taking Spinoza to employ two notions of “existence.” I conclude by offering evidence that this is in fact what Spinoza does. (shrink)

In this essay, the author sets out the question: where bodies move according to Spinoza's physical thought? The question is linked to another one Oldenberg asked him then, about how objects acquire their unique individuality and the way nature behaves as a unit, despite the complexity of its constitution. The response refers not only to Spinoza's criticism to Cartesian mechanics, as usual, but will appeal to Spinoza's own interpretation, consistent with his system, about the constitution and dynamics of the physical (...) world, in terms of a mechanic interaction between bodies, firm enough to accomplish the task for which it was designed. (shrink)