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In the New Essays on Human Understanding, Leibniz argues chapter by chapter with John Locke's Essay Concerning Human Understanding, challenging his views about knowledge, personal identity, God, morality, mind and matter, nature versus nurture, logic and language, and a host of other topics. The work is a series of sharp, deep discussions by one great philosopher of the work of another. Leibniz's references to his contemporaries and his discussions of the ideas and institutions of the age make this a fascinating (...) and valuable document in the history of ideas. The work was originally written in French, and the version by Peter Remnant and Jonathan Bennett, based on the only reliable French edition (published in 1962), first appeared in 1981 and has become the standard English translation. It has been thoroughly revised for this series and provided with a new and longer introduction, a chronology on Leibniz's life and career and a guide to further reading. (shrink)

I argue that Hobbes isn't really a materialist in the early 1640s (in, e.g., the Third Objections to Descartes's Meditations). That is, he doesn't assert that bodies are the only substances. However, he does think that bodies are the only substances we can think about using imagistic ideas.

: For Cudworth, God would be a drudge if He did each and every thing, and so the universe contains plastic natures. Malebranche argues that finite power is unintelligible and thus that God does do each and every thing. The supremacy of God is reflected in the range of His activity and also in the manner of His activity: He acts by general non-composite volitions. Malebranche (like Cudworth) is careful to adjust other aspects of his system to square with his (...) position on causality, but his view that we are free and accountable for what we do will not be revised. (shrink)

There is in the New Essays a prominent line of argument that Leibniz took to have remarkable scope. If it works, it sweeps away most of the mainstays of Locke’s metaphysics: atoms, vacuum, real space and time, absolute rest, inactive faculties, and the tabula rasa. It alone does not suffice to undermine the possibility of thinking matter, but it contributes support to that most important of Leibniz’s claims against Locke. Because it is so central to the project of New Essays, (...) I am going to focus mainly on the argument as it is employed there; doing so illuminates both the work and the argument. But Leibniz used it a number of times in letters and notes from roughly the same time period and it is related to a thesis in the Discourse on Metaphysics and letters to Arnauld. The argument invokes a distinction between abstract or incomplete entities and concrete or complete ones. Its premises are that atoms, vacuum, inactive substances, and other items on Leibniz’s list are homogeneous or uniform; that all things that are uniform or otherwise exactly alike are abstract; and that nothing abstract can be found in nature. (shrink)

Leibniz repeatedly daims to refute "Hobbes' doctrine of arbitrary truth". I argue against several recent expositors of Hobbes that Hobbes' view comes to nothing more scandalous than "nominalism" about kind terms. Although some have recognized that it is this thesis which Leibniz claims to refute, his argument has not been correctly understood. I maintain that the argument rests upon Leibniz' theory of signs and his account of concepts. In brief, Leibniz argues that concepts have structures which correspond to structures of (...) (possible) things; thus, kinds are independent of language and truth is independent of arbitrary convention. (shrink)

This volume gathers together for the first time are all the key texts in a crucial debate in modern philosophy, centered on Leibniz's famous 1695 essay, the "New System of the Nature of Substances and their Communication," in which he introduced his strikingly original theory of metaphysics. His "system" became increasingly famous and drew him into discussion and development of these ideas, both in public and in private, with a variety of thinkers, most notably the great French philosopher Pierre Bayle. (...) Woolhouse's and Francks's new English edition gives the only full representation of this debate, and will therefore be essential reading for anyone who wishes to gain a proper understanding of Leibniz's philosophy and its intelletual context. All the texts are newly translated and extensively annotated; many appear in English for the first time. (shrink)

Volumes I and II provided a completely new translation of the philosophical works of Descartes, based on the best available Latin and French texts. Volume III contains 207 of Descartes' letters, over half of which have previously not been translated into English. It incorporates, in its entirety, Anthony Kenny's celebrated translation of selected philosophical letters, first published in 1970. In conjunction with Volumes I and II it is designed to meet the widespread demand for a comprehensive, authoritative and accurate edition (...) of Descartes' philosophical writings in clear and readable modern English. (shrink)

Offering an invaluable introduction to Leibniz's philosophy, this volume collects many of his most important texts, beginning with the Discourse on Metaphysics (1686), which marks the beginning of maturity in his ideas, and ending with the Monadology (1714), which was written in response to requests for a systematic, organized account of his overall philosophy. Also included in this volume are critical reactions to Leibniz's work by his contemporaries (Antoine Arnauld, Pierre Bayle, and Simon Foucher), together with Leibniz's responses. All the (...) texts are newly translated into English for this edition, and each is preceded by a summary explaining its background, structure, and content. (shrink)

The privacy, real or illusory, afforded by the personal letter allows each participant the philosophical freedom to explore a range of possible opinions, to experiment with different ideas, to hesitate, and to change his or her mind in ways that published articles and books discourage. The private letter also allows the use of language and style of writing to be altered to suit the particular recipient. This is especially evident in Leibniz's correspondence with Des Bosses. Sometimes, however, the intended recipient (...) is not the addressee, as when Leibniz engaged with Locke through Thomas Burnett of Kemney. This situation was not an isolated occurrence in Leibniz's dealings with Locke. In this chapter, we shall see how Leibniz attempted to engage with Locke through a second correspondence and how he adapted the style and presentation of his views, not for the main correspondent, Lady Masham, but for the other intended recipient. We shall also see that the views Leibniz presents confirm his loyalty during this period to an ontology of embodied, perceiving substances. -/- The correspondence with Damaris Masham began shortly after Lady Masham sent Leibniz a copy of her father's The True Intellectual System of the Universe (TIS) at the end of 1703. Learning that the book was on its way, Leibniz's first letter was intended to thank her in advance. (shrink)

Hobbes denies in Leviathan that we have an idea of God. He does think, though, that God exists, and does not even deny that we can think about God, even though he says we have no idea of God. There is, Hobbes thinks, another cognitive mechanism by means of which we can think about God. That mechanism allows us only to think a few things about God though. This constrains what Hobbes can say about our knowledge of God, and grounds (...) his belief in a fairly strong version of the thesis that God is incomprehensible. (shrink)