David Hume (review)

478 HISTORY OF PHILOSOPHY David Hume. By Nicholas Capaldi. (Boston: Twayne Publishers, 1975. Pp. 241. $7.50) Professor Capaldi has taken Hume's profession in the Treatise to establish a new "science of man" very seriously indeed, and he intends to show us in this book how the "almost entirely new'" foundation of this science is thoroughly Newtonian. Hume, he tells us, was "the first philosopher to understand fully, to appreciate and to articulate the philosophical implications of Newtonian physics" (p. 50). Newtonian science is therefore the basis of Humean philosophy, and we should at once set aside the idea that this philosophy is in any way dependent on a preconceived theory of psychology. Even worse would be for us to accept the vulgar error that Hume failed to distinguish between psychology and logic. These are not the only myths Capaldi is intent on exploding, nor the only windmills at which he tilts. He tells us, among other things, that Hume should not be thought of as belonging to the Locke-Berkeley tradition; that Hume's theory of causation must not be regarded as having any connection with his theory of perception; that there is no problem of induction in Hume; that critics as distinguished as Popper and Passmore have been mistaken about Hume's explanation of "constant conjunction" (p. 124); that Hume was not a hedonist; that Hume was not concerned with the is-ought problem; that Hume does not deny the argument from design; and, finally, that we ought ourselves to be skeptical of Hume's alleged skepticism. Lest I give the impression that the book is a long series of refutations, let me give examples of the positive assertions: Hume should be seen as developing, albeit rather elaborately, a common sense theory of reality; Hume advances a naturalistic theory of ethics as well as of religion; Hume provides a scientific basis for the social sciences; and Hume provides a convincing psychology in his theory of the passions. The scope of this relatively short work is therefore rather extensive, and to achieve a tour de force of Hume's thought, Capaldi has organized his book tightly. After a brief glimpse at Hume's life, we are led, in successive chapters, to consider his view of philosophy, the Newtonian program of his work, the structure of the Treatise, the analysis of causation, his moral theory, the theory of the passions, and finally questions about his philosophy of religion and his alleged skepticism. Hume's first contact with Newtonian ideas was probably at Edinburgh University as an undergraduate; at any rate, by the time he comes to write the Treatise he is, according to Capaldi, self-consciously out to apply Newton's method to the "moral" subjects--ethics, psychology, and what we now call the social sciences. Hume begins by rejecting any kind of speculative metaphysics in the traditional, Aristotelian manner; he insists that philosophers, like physicists, must limit themselves to actual experience and concern themselves with experimentation along the lines laid down by Newton. The "Newtonian method" consists of six stages. The first is the identification and isolation of the objects of analysis. Hume's division of perception into ideas and impressions is his first move in applying the method. The second stage is experimentation; in Hume's case introspection and observation of human behavior provide this obligatory experimentation. The next stage consists of the working out of generalizations: Hume's theory of association corresponds to Newton's theory of the attraction of physical bodies. The fourth stage of the Newtonian program is to extend the theory to explain further phenomena: in Hume's case the theory of association is used as an explanatory principle throughout the Treatise. Finally, Newton's concern with momentum is reflected in Hume's theory of the transfer of vivacity, and both share a recognition of the inherent limitations of the reasoning faculty of man. Hume thus combines these procedures and principles of Newtonian science and applies them to philosophical investigation, placing this study on a new footing and dispelling the Hume, A Treatise of Human Nature, ed. L. A. Selby-Bigge(Oxford, 1888), p. xx. BOOK REVIEWS 479 them to philosophical investigation, placing...