Hume: Between Leibniz and Kant (The role of pre-established harmony in Hume's philosophy)

Hume: Between Leibniz and Kant (The role of pre-established harmony in Hume's philosophy) Vadim Vasilyev 1. Introduction In the history of eighteenth century European philosophy, Hume appears as an important connecting link between Leibniz and Kant. I mean, however, not only the well-known historical fact that Hume "awakened Kant from his dogmatic slumber" (and it was the "dogmatism" ofLeibnizian metaphysics), but I shall try to show that it is true from the philosophical point of view as well. The first problem I would like to discuss is the actual relationship between Hume and Leibniz. Hume never openly criticized the views of Leibniz. On the other hand, Hume did not admit himself to be a follower of him. Did Hume everread any works ofLeibniz? Hume has never said thathe did. Hume also hasn't directly quoted these works, so it looks like Hume wasn't acquainted with them at all. Nonetheless, we can show that already in 1739 Hume had known Theodicée which can be considered as the main treatise ofLeibniz. In his Abstract Hume writes: The celebratedMonsieurLeibnitz has observed it tobe a defect in the common systems of logic, that they are very copious when they explain the operations ofthe understanding in the forming ofdemonstrations, but are too concise when they treat of probabilities, and those other measures of evidence on which life and action entirely depend, and which are our guides even in most of our philosophical speculations. In this censure, he comprehends the essay on human understanding, Ie recherche de la vérité, and l'art dépenser.1 The fragment is a rendering of the following passage from Theodicée: caril n'y a rien de plus impartaitqui nostre Logique, lorsqu'on va au delà des argumens nécessaires; et les plus excellens philosophes de nostre temps, tels que les Auteurs de l'Art de penser, de la Recherche de la vérité, et de l'Essai sur Volume XLX Number 1 19 VADIMVASILYEV l'entendment, ont été fort éloignés de nous marquer les vrais moyens propres à aider cette faculté qui nous doit faire peser les apparences du vrait et du faux: sans parler de l'art d'inventer.2 So, it is highly probable that Hume knew Theodicée. The ideas ofLeibniz in Hume's philosophy The most important philosophical ideas of Theodicée are: the definitions ofpossibility and oftwo kinds ofnecessity, a theory of"the best possible world" and a conception ofthe pre-established harmony. As we shall see, all these ideas, one way or another, were assimilated by Hume. In his Theodicée Leibniz states that a distinction should be made between two kinds of necessity and, correspondingly, between two kinds ofnecessary knowledge: metaphysical and moral. ? ne faut done que bien entendre des distinctions, comme celle que nous avons pressée bien souvent entre le necessaire et le certain, et entre la nécessité métaphysique et la nécessité morale. (Theodicée, 284, par. 282) Metaphysical or mathematical truths are such that propositions which are opposite to them imply contradictions. Or les vérités de la Raison sont de deux sortes; les unes sont ce qu'on appelle les Vérités Eternelles, qui sont abolument nécessaires, en sorte que l'opposé implique contradiction. (Theodicée, 50, par. 2) Not so regarding the moral truths; the opposite statements may be false but they imply no contradictions and are possible: "? est vray qu'il n'y auroit point eu de contradiction dans la supposition que Spinosa fût mort à Leide, et non pas à La Haye; il n'y auroit rien de si possible" (Theodicée, 218, par. 174). The possibility is equivalent to logical consistency and what is possible may be distinctly conceived: puisqu'il y a bien des choses qui ne sont jamais arrivées et n'arriveront jamais, et qui cependant sont concevables distinctement, et n'impliquent aucune contradiction, comment peut on dire qu'elles sont absolument impossibles? (Theodicée, 257, par. 234) 20Hume Studies HUME: BETWEEN LEIBNIZ AND KANT Hume uses all these definitions. The following fragment is a good example. The non-existence ofany being, without exception, is as clear and distinct an...