Vienna, 1714: Late in life, Gottfried Wilhelm Leibniz, the universal genius of his time, puts down his pen and declares his description of the universe to be complete. In the evening, he sits in his study room among letters, books, and manuscripts as his young friend Theodor comes for a visit. Theodor is bothered by one question: Why is there evil? And why do people commit crimes? With an example from ancient Greek mythology, Leibniz develops his theory about the best of all possible worlds. With this vivid "story within a story" Jean Paul Mongin successfully imparts the complex philosophical ideas of Leibniz to young readers. At its most basic, philosophy is about learning how to think about the world around us. It should come as no surprise, then, that children make excellent philosophers Naturally inquisitive, pint-size scholars need little prompting before being willing to consider life's "big questions," however strange or impractical. Plato & Co. introduces children--and curious grown-ups--to the lives and work of famous philosophers, from Socrates to Descartes, Einstein, Marx, and Wittgenstein. Each book in the series features an engaging--and often funny--story that presents basic tenets of philosophical thought alongside vibrant color illustrations.

This volume brings together a number of original articles by leading Leibniz scholars to address the meaning and significance of Leibniz’s notions of compossibility and possible worlds. In order to avoid the conclusion that everything that exists is necessary, or that all possibles are actual, as Spinoza held, Leibniz argued that not all possible substances are compossible, that is, capable of coexisting. In Leibniz’s view, the compossibility relation divides all possible substances into disjoint sets, each of which constitutes a possible world, or a way that God might have created things. For Leibniz, then, it is the compossibility relation that individuates possible worlds; and possible worlds form the objects of God’s choice, from among which he chooses the best for creation. Thus the notions of compossibility and possible worlds are of major significance for Leibniz’s metaphysics, his theodicy, and, ultimately, for his ethics. Given the fact, however, that none of the approaches to understanding Leibniz’s notions of compossibility and possible words suggested to date have gained universal acceptance, the goal of this book is to gather a body of new papers that explore ways of either refining previous interpretations in light of the objections that have been raised against them, or ways of framing new interpretations that will contribute to a fresh understanding of these key notions in Leibniz’s thought.

The first comprehensive survey of the criticisms of Leibniz's philosophical optimism in the first half of the eighteenth century, when what has been called the ‘debacle of the perfect world’ first began.

This Very Short Introduction considers who Leibniz was and introduces his overarching intellectual vision. It follows his pursuit of the systematic reform and advancement of all the sciences, to be undertaken as a collaborative enterprise supported by an enlightened ruler, and his ultimate goal of the improvement of the human condition.

Originally published: New York: Farrar. Straus, and Giroux, 2008.

Candide is a French satire by Voltaire, a philosopher of the Age of Enlightenment. It begins with a young man, Candide, who is living a sheltered life in an Edenic paradise and being indoctrinated with Leibnizian optimism (or simply Optimism) by his mentor, Pangloss. The work describes the abrupt cessation of this lifestyle, followed by Candide's slow, painful disillusionment as he witnesses and experiences great hardships in the world. Voltaire concludes with Candide, if not rejecting optimism outright, advocating a deeply practical precept, "we must cultivate our garden", in lieu of the Leibnizian mantra of Pangloss, "all is for the best in the best of all possible worlds". Candide is characterized by its sarcastic tone, as well as by its erratic, fantastical and fast-moving plot. A picaresque novel it parodies many adventure and romance clichés, the struggles of which are caricatured in a tone that is mordantly matter-of-fact. Still, the events discussed are often based on historical happenings, such as the Seven Years' War and the 1755 Lisbon earthquake. As philosophers of Voltaire's day contended with the problem of evil, so too does Candide in this short novel, albeit more directly and humorously. Voltaire ridicules religion, theologians, governments, armies, philosophies, and philosophers through allegory; most conspicuously, he assaults Leibniz and his optimism. As expected by Voltaire, Candide has enjoyed both great success and great scandal. Immediately after its secretive publication, the book was widely banned because it contained religious blasphemy, political sedition and intellectual hostility hidden under a thin veil of naïveté. However, with its sharp wit and insightful portrayal of the human condition, the novel has since inspired many later authors and artists to mimic and adapt it. Today, Candide is recognized as Voltaire's magnum opus and is often listed as part of the Western canon; it is arguably taught more than any other work of French literature. It was listed as one of The 100 Most Influential Books Ever Written.

Optimists believe this is the best of all possible worlds, and pessimists fear that might really be the case. There was a time, during the 17th and 18th centuries, when scientists and mathematicians felt they could provide the answer. This book is their story.