Taking Isaac Newton at his own word, historians have long agreed that the decade of the 1660s, when Newton was a young man in his twenties, was the critical period in his scientific career. In the years 1665 and 1666, he has told us, he hit on the ideas of cosmic gravitation, the composition of white light, and the fluxional calculus. The elaboration of these basic ideas constituted his scientific achievement. Nevertheless, the decade of the 1660s has remained a virtual (...) blank in our knowledge of Newton. It need not remain so always. His papers contain a wealth of manuscripts from his undergraduate years and the period immediately following. The first volume of his mathematical papers, which will soon be published, will demonstrate how extensive the information on his early mathematical development is. The development of his non-mathematical studies, especially of what I shall call his scientific studies to distinguish them from the mathematical, can be followed as well—in his reading notes, in his notebooks, above all in the passage in his philosophical notebook labelled Quaestiones quaedam Philosophicae. In this passage we see emerging into consciousness for the first time the questions on which Newton's philosophy of nature was built. (shrink)

The Philosophical Writings of Descartes VOLUME 3. Volumes 1 and 2 provide a completely new translation of many of the major works in metaphysics, epistemology, and natural philosophy.

Presents Newton's unifying idea of gravitation and explains how he converted physics from a science of explanation into a general mathematical system.

The book also includes a chronological table of significant events, select bibliography, succinct explanatory notes, and an index--all of which supply ...

One of the deepest tensions in Locke’s Essay, a work full of profound and productive conflicts, is one between Locke’s metaphysical tendencies—his inclination to presuppose or even to argue for substantive metaphysical positions—and his devout epistemic modesty, which seems to urge agnosticism about major metaphysical issues. Both tendencies are deeply rooted in the Essay. Locke is a theorist of substance, essence, quality. Yet, his favorite conclusions are epistemically pessimistic, even skeptical; when it comes to questions about how the world is (...) constituted, our understandings cannot penetrate very far. Locke seems torn between metaphysics and modesty, between dogmatism and skepticism. This chapter will consider two specific examples of this sort of tension. The first involves the ontology of body, and the second, the ontology of mind. The conflict concerning bodily natures looks like this: As is well-known, Locke typically describes bodies in the terms of the corpuscularian science of his day, as exemplified especially by the natural philosopher Robert Boyle. Locke’s characterizations of the real essences of bodies are mechanist. He envisions them as corpuscularian textures-- spatial arrangements of particles possessing size. (shrink)

Among the more notorious of Cartesian doctrines is the bête machine doctrine – the view that brute animals lack not only reason, but any form of consciousness (having no mind or soul). Recent English commentaries have served to obscure, rather than to clarify, the historical Descartes' views. Standard interpretations have it that insofar as Descartes intends to establish the bête machine doctrine his arguments are palpably flawed. One camp of interpreters thus disputes that he even holds the doctrine. As I (...) shall attempt to show, not only does Descartes affirm the doctrine, his supporting arguments are not palpably flawed – even if they ultimately come up short. It will indeed emerge that, in making his case, Descartes employs interesting argumentative strategies that have not been duly appreciated. (shrink)

: Newton's critics argued that his treatment of gravity in the Principia saddles him with a substantial dilemma. If he insists that gravity is a real force, he must invoke action at a distance because of his explicit failure to characterize the mechanism underlying gravity. To avoid distant action, however, he must admit that gravity is not a real force, and that he has therefore failed to discover the actual cause of the phenomena associated with it. A reinterpretation of Newton's (...) distinction between the "mathematical" and the "physical" treatment of force indicates how he can reject each horn of this dilemma. (shrink)

Among the more notorious of Cartesian doctrines is thebête machinedoctrine — the view that brute animals lack not only reason, but any form of consciousness. Recent English commentaries have served to obscure, rather than to clarify, the historical Descartes's views. Standard interpretations have it that insofar as Descartes intends to establish thebête machinedoctrine his arguments are palpably flawed. One camp of interpreters thus disputes that he even holds the doctrine. As I shall attempt to show, not only does Descartes affirm (...) the doctrine, his supporting arguments are not palpably flawed — even if they ultimately come up short. It will indeed emerge that, in making his case, Descartes employs interesting argumentative strategies that have not been duly appreciated. (shrink)