Geoffrey Gorham

When McTaggart puts Spinoza on his short list of philosophers who considered time unreal, he is falling in line with a reading of Spinoza’s philosophy of time advanced by contemporaneous British Idealists and by Hegel. The idealists understood that there is much at stake concerning the ontological status of Spinozistic time. If time is essential to motion then temporal idealism entails that nearly everything—apart from God conceived sub specie aeternitatis—is imaginary. I argue that although time is indeed ‘imaginary’—in a sense ‘no one doubts’ as Spinoza says—there is no good reason to infer that bodies, the infinite modes, and conatus are imaginary in the same sense. To avoid this conflation, we need to follow Spinoza in carefully distinguishing between tempus and duratio. Duration is not only real; it has all the structure needed to ground Spinozistic motion, bodies and conatus

Hobbes insists that motion, which plays numerous important roles in his natural philosophy, presupposes time. But he seems to advance a reductionist, even idealist, conception of time itself. For example, he denies that time itself can measure motion; rather motion measures time. Indeed, time is ‘imaginary’ and only the present is strictly real. In various ways, these views of time threaten to undermine the ‘motionalist’ foundations of Hobbes’s mechanical philosophy. This paper aims to block these threats by developing a realist interpretation of Hobbesian time, analogous to his conception of ‘real space’. This real time serves as an objective framework for motion in Hobbes’s natural philosophy.

: Descartes provides an original and puzzling argument for the traditional theological doctrine that the world is continuously created by God. His key premise is that the parts of the duration of anything are "completely independent" of one another. I argue that Descartes derives this temporal independence thesis simply from the principle that causes are necessarily simultaneous with their effects. I argue further that it follows from Descartes's version of the continuous creation doctrine that God is the instantaneous and total cause of everything that happens, and that this is just what his physics demands. But although God is the total cause of everything, he is not the only cause, since Descartes considers it obvious that finite minds have the power to move bodies. In the face of this apparent paradox, several recent commentators have suggested that Descartes accepted the late scholastic view that God and finite causes somehow collaborate or concur in the production of numerically identical effects. But close examination reveals that the case for Cartesian concurrentism is weak. Fortunately, there is a simpler and more fruitful solution to the problem of reconciling divine and human action. I argue that that in Descartes's world certain motions, such as voluntary movements of our bodies, are causally overdetermined This account allows Descartes to avoid occasionalism without embracing an elaborate metaphysics of secondary causality. Finally, I argue that the overdeterminist interpretation sheds new light on two longstanding problems of Cartesian metaphysics. First, it resolves a serious difficulty with a standard reading of Descartes's conception of human freedom. Second, it offers a novel approach to the old problem of reconciling genuine human action with the principle of the conservation of total quantity of motion

Seventeenth-century authors frequently infer the attributes of time by analogy from already established features of space. The rationale for this can be traced back to Aristotle's analysis of time as ?the number of movement?, where movement requires a prior understanding of spatial magnitude. Although these authors are anti-Aristotelian, they were concerned, contra Aristotle, to establish the existence of ?empty space?, and a notion of absolute space which fit this idea. Although they had no independent rationale for the existence of absolute time, it seemed to go with absolute space, and they drew on a long tradition of space-time parallelism in securing this

The employment by seventeenth-century natural philosophers of stock theological notions like creation, immensity, and eternity in the articulation and justification of emerging physical programs disrupted a delicate but longstanding balance between transcendent and immanent conceptions of God. By playing a prominent (if not always leading) role in many of the major scientific developments of the period, God became more intimately involved with natural processes than at any time since antiquity. In this discussion, I am particularly concerned with the causal and spatio-temporal relations between God and nature in the seventeenth century as recent scholarship has revealed how dramatically traditional conceptions of these relations were transformed by philosophers and scientists like Descartes, Malebranche, More, and Newton.

Beginning with Berkeley and Leibniz, philosophers have been puzzled by the close yet ambivalent association in Newton's ontology between God and absolute space and time. The 1962 publication of Newton's highly philosophical manuscript De Gravitatione has enriched our understanding of his subtle, sometimes cryptic, remarks on the divine underpinnings of space and time in better-known published works. But it has certainly not produced a scholarly consensus about Newton's exact position. In fact, three distinct lines of interpretation have emerged: Independence: space and time are not essentially related to God. Causation: space and time are caused by God. Assimilation: space and time are attributes of God. This paper defends the third interpretation against the first two by drawing out the under-appreciated influence of Descartes' metaphysics on Newton's ‘physico-theology’.

Descartes' account of the material world relies heavily on time. Most importantly, time is a component of speed, which figures in his fundamental conservation principle and laws. However, in his most systematic discussion of the concept, time is treated as some-how reducible both to thought and to motion. Such reductionistic views, while common among Descartes' late scholastic contemporaries, are very ill-suited to Cartesian physics. I show that, in spite of the apparent identifications with thought and motion, Cartesian time retains—in the form of what I will call 'successive duration'—precisely the intrinsic structure necessary to serve as an independent parameter of quantitative physics. As is often the case with Descartes, he gives the impression of embracing traditional doctrines while in fact radically transforming the underlying concepts to serve his scientific agenda. His theory of time, though formulated in Aristotelian terms, anticipates Newton in important respects

God and time play crucial, intricately related roles in Descartes' project of grounding mathematical physics on metaphysical first principles. This naturally raises the perennial theological question of God's precise relation to time. I argue, against the strong current of recent commentary, that Descartes' God is fully temporal. This means that God's duration is successive, with parts ordered 'before and after', rather than permanent or 'all at once'. My argument will underscore the seamless connection between Descartes' theology and his physics, and the degree to which he was prepared to depart from orthodoxy in the former in order to secure an a priori foundation for the latter. As Newton would later do, Descartes freed time from its traditional dependence on bodily motion and so removed an important barrier to making God temporal. Acting in time, God makes the physical world intelligible in a way He could not were He timeless

: This paper presents a detailed account of Descartes' derivation of his second law of nature—the law of rectilinear motion—from a priori metaphysical principles. Unlike the other laws the proof of the second depends essentially on a metaphysical assumption about the temporal immediacy of God's operation. Recent commentators (e.g., Des Chene and Garber) have not adequately explained the precise role of this assumption in the proof and Descartes' reasoning has continued to seem somewhat arbitrary as a result. My account better reveals the dependence of the second law on fundamental principles about time and causality