Contemporary philosopher John Searle has characterized Gottfried Wilhelm Leibniz (1646-1716) as"the most intelligent human being who has ever lived." The German philosopher, mathematician, and logician invented calculus (independently of Sir Isaac Newton), topology, determinants, binary arithmetic, symbolic logic, rational mechanics, and much more. His metaphysics bequeathed a set of problems and approaches that have influenced the course of Western philosophy from Kant in the eighteenth century until the present day.<i>On Leibniz</i> examines many aspects of Leibniz's work and life. This expanded edition adds new chapters that explore Leibniz's revolutionary deciphering machine; his theoretical interest in cryptography and its ties to algebra; his thoughts on eternal recurrence theory; his rebuttal of the thesis of improvability in the world and cosmos; and an overview of American scholarship on Leibniz.Other chapters reveal Leibniz as a substantial contributor to theories of knowledge. Discussions of his epistemology and methodology, its relationship to John Maynard Keynes and Talmudic scholarship, broaden the traditional view of Leibniz. Rescher also views Leibniz's scholarly development and professional career in historical context. As a"philosopher courtier" to the Hanoverian court, Leibniz was associated with the leading intellectuals and politicians of his era, including Spinoza, Huygens, Newton, Queen Sophie Charlotte, and Tsar Peter the Great.Rescher extrapolates the fundamentals of Leibniz's ontology: the theory of possible worlds, the world's contingency, space-time frameworks, and intermonadic relationships. In conclusion, Rescher positions Leibniz as a philosophical role model for today's scholars. He argues that many current problems can be effectively addressed with principles of process philosophy inspired by Leibniz's system of monadology.

Nicholas Rescher was Distinguished University Professor of Philosophy at the University of Pittsburgh and co-chairman of the Center for Philosophy of Science. A member of the American Academy of Arts and Sciences, he served as president of the Eastern Division of the American Philosophical Association, the Leibniz Society of North America, the Charles S. Peirce Society, the American Catholic Philosophical Association, and the Metaphysical Society of America. Rescher was the author or editor of more than one hundred books, includingIgnorance (On the Wider Implications of Deficient Knowledge), Philosophical Inquiries: An Introduction to Problems of Philosophy, andA Journey through Philosophy in 101 Anecdotes.