The relationship between John Locke and Isaac Newton, his co-founder of, in the apt phrase of one recent writer, ‘the Moderate Enlightenment’ of the eighteenth century, has many dimensions. There is their friendship, which began only after each had written his major work, and which had its stormy interlude. There is the difficult question of their mutual impact. In what ways did each draw intellectually on the other? That there was some debt of each to the other is almost certain, (...) but its exact extent is problematic. Questions may be asked over a whole range of intellectual issues, but not always answered. Thus their theology, which was in many respects close, and which forms the bulk of their surviving correspondence, may yet reveal mutual influence. There is the question of their political views, where both were firmly Whig. But it is upon their philosophy, and certain aspects of their philosophy in particular, that this paper will concentrate. My main theme is the nature of their empiricism, and my main contention is that between them they produced a powerful and comprehensive philosophy. (shrink)

I explore Locke’s complex attitude toward the natural philosophy of his day by focusing on Locke’s own treatment of Newton’s theory of gravity and the presence of Lockean themes in defenses of Newtonian attraction/gravity by Maupertuis and other early Newtonians. In doing so, I highlight the inadequacy of an unqualified labeling of Locke as “mechanist” or “Newtonian.”.

Recent interpretations of Locke's primary/secondary quality distinction have tended to emphasize Locke's relationship to the corpuscularian science of his time, especially to that of Boyle. Although this trend may have corrected the unfortunate tendency to view Locke in isolation from his scientific contemporaries, it nevertheless has resulted in some over- simplifications and distortions of Locke's general enterprise. As everyone now agrees, Locke was attempting to provide a philosophical foundation for English corpuscularianism and one must therefore look not only at the (...) current scientific hypotheses but also at the nature of the philosophical foundation Locke was attempting to erect. In particular, Locke made an attempt, based on epistemological principles, to give a philosophical justification of atomistic corpuscularianism. Moreover, he was not content to give this justification post hoc—the epistemological foundation was prior to, and determined the framework for, the details of the correct scientific theory. Locke's epistemology made legitimate an atomistic theory, one making crucial use of the notion of solidity in the definition of the elementary particles, although it did not prejudge the details of this theory. (shrink)