Gottfried Leibniz

Leibniz, Gottfried Wilhelm, Baron von

Gottfried Wilhelm Leibniz, Baron von (both: gôt´frēt vĬl´hĕlm bärôn´ fan līp´nĬts), 1646–1716, German philosopher and mathematician, b. Leipzig. Although known primarily as a philosopher, Leibniz's scholarship embraced the physical sciences, history, law, diplomacy, and logic. The recognition of his work in logic came quite late; manuscripts published in the 20th cent. mark him as the founder of symbolic logic.

Life

After studying at Leipzig, his native city, and at Jena, he became a doctor of law at Altdorf (1666). Constantly occupied with practical political concerns, Leibniz never accepted an academic position. He was (1666–73) in the diplomatic service of the elector of Mainz, who employed him on several political projects; one of these was a plan to persuade King Louis XIV of France to attack Egypt and thereby to divert his attention from Germany. While in Paris (1672–76) he came into contact with some of the foremost minds of Europe.

About that time he developed, independently of Newton, the infinitesimal calculus. Leibniz's calculus was published in 1684, three years before Newton's, and his system of notation was universally adopted. From 1676 he was employed by the duke of Brunswick-Lüneburg (later the elector of Hanover), whom he served as privy councillor, librarian, and historian. This association brought him close to the elector of Brandenburg (soon to be king of Prussia), who was persuaded by Leibniz to establish a scientific academy at Berlin. In 1700 he became its first president.

Important Philosophical Works

Most of Leibniz's philosophical writings are occasional pieces, addressed to various people. The two published in his lifetime were Essais de Théodicée sur la bonté de Dieu, la liberté de l'homme, et l'origine du mal (1710) and Monadology (1714). It was largely these works that influenced Christian von Wolff, whose popularization of the Leibnizian system became the standard academic philosophy in 18th-century Germany.

Leibniz's major philosophical work, Nouveaux Essais sur l'entendement humain (1704), contains the views of Leibniz on points raised in Locke's Essay Concerning Human Understanding. Because of Locke's death, however, it was not published until 1765. The publication of Nouveaux Essais in 1765 was important because it revealed for the first time the "true Leibniz" as opposed to the popularized version of Wolff, and it had a decisive effect on Immanuel Kant and the whole German Enlightenment.

Philosophy

Leibniz's philosophy is a consistent rationalism. The universe forms one context in which each occurrence can be seen in relation to every other. Since the universe is the result of a divine plan, Leibniz calls it the best of all possible worlds; for this he was satirized by Voltaire in Candide. Leibniz's assertion, however, does not imply an unqualified optimism, since evil is a necessary ingredient in even the best of all possible worlds. The ultimate constituents of the universe, in his view, are monads or simple substances, each of which represents the universe from a different point of view. Being simple, monads are immaterial and thus cannot act. Apparent interaction is explained in terms of the principle of preestablished harmony.

The principle of continuity as expressed in the phrase "nature makes no leaps" is another part of Leibniz's rationalism. The monads are arranged in an infinitely ascending scale, based on the distinctness with which each represents the universe. All monads have perception (consciousness), but only rational monads have apperception (self-consciousness). A basic distinction in Leibniz's logic is that made between "truths of reason," or necessary propositions, whose principle is the law of noncontradiction, and "truths of fact," or contingent propositions, based on the principle of sufficient reason. The principle has its root in the divine intellect, and its most important expression is his law of causality.

With the decline of interest in metaphysics in contemporary philosophy, recent studies have tended to emphasize Leibniz's significance in mathematics and logic. However, Leibniz's metaphysics have not been neglected but rather reinterpreted in light of his mathematical and logical works.

Bibliography

See Liebniz's political writings, ed. and tr. by P. Riley (1972); biographies by G. M. Ross (1984) and M. R. Antognazza (2008); G. H. Parkinson, Logic and Reality in Leibniz's Metaphysics (1965); H. Ishiguro, Leibniz's Philosophy of Logic and Language (1972).

The Columbia Encyclopedia, 6th ed. Copyright© 2013, The Columbia University Press.

Selected full-text books and articles on this topic

The Philosophy of Leibniz: Metaphysics and Language
Benson Mates.
Oxford University Press, 1989
Writings on China
Gottfried Wilhelm Leibniz; Daniel J. Cook; Henry Rosemont Jr.
Open Court, 1994
Leibniz: Determinist, Theist, Idealist
Robert Merrihew Adams.
Oxford University Press, 1994
Leibniz
Ruth Lydia Saw.
Penguin Books, 1954
Divine Machines: Leibniz and the Sciences of Life
Justin E. H Smith.
Princeton University Press, 2011
New Essays on the Rationalists
Rocco J. Gennaro; Charles Huenemann.
Oxford University Press, 1999
Librarian’s tip: Chap. 6 "Leibniz's Constuctivism and Infinitely Folded Matter"
On the Very Concept of Harmony in Leibniz
Carlin, Laurence.
The Review of Metaphysics, Vol. 54, No. 1, September 2000
Leibniz's 'New System' and Associated Contemporary Texts
R. S. Woolhouse; Richard Francks; R. S. Woolhouse; Richard Francks; Gottfried Leibniz.
Clarendon Press, 1997
The Light of the Soul: Theories of Ideas in Leibniz, Malebranche, and Descartes
Nicholas Jolley.
Clarendon Press, 1998
Substance and Individuation in Leibniz
J. A. Cover; John O'Leary-Hawthorne.
Cambridge University Press, 1999
Philosophy of Mathematics and Mathematical Practice in the Seventeenth Century
Paolo Mancosu.
Oxford University Press, 1996
Librarian’s tip: Chap. 6 "Leibniz's Differential Calculus and its Opponents"
The Development of Logic
Martha Kneale; William Kneale.
Clarendon Press, 1984
Librarian’s tip: "The Interests of Leibniz" begins on p. 320 and "Leibniz's Calculus de Continentibus et Contentis" begins on p. 336
Routledge Philosophy Guidebook to Leibniz and the Monadology
Anthony Savile.
Routledge, 2000
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