Gottfried Wilhelm Leibniz

Gottfried Wilhelm Leibniz (Leipzig, July 1, 1646 – Hanover, November 14, 1716) was a German philosopher, mathematician, logician, jurist, historian, and diplomat; he was one of the most prominent figures of rationalism and one of the last great polymaths in European history.

He studied philosophy and law at the universities of Leipzig, Jena, and Altdorf, where he earned his doctorate in law in 1666. He served as a diplomat, advisor, and librarian at German princely courts, particularly in Hanover. He maintained an extensive correspondence with leading European scientists and philosophers.

Independently of Isaac Newton, he developed infinitesimal calculus, and his mathematical notation remains in use to this day. He also worked on the binary number system, logic, and the construction of calculating machines, thereby contributing to the development of modern mathematics and computer science.

In philosophy, he developed the doctrine of monads—simple, indivisible spiritual substances that form the foundation of reality. According to his theory of pre-established harmony, God coordinated the actions of all monads without them directly influencing one another. Among his most important works are Discourse on Metaphysics (1686), New Essays on Human Understanding (written in 1704, published in 1765), Theodicy (1710), Monadology (1714), and Principles of Nature and Grace, Based on Reason (1714).

In Theodicy, he examined the problem of evil and God's goodness, arguing that we live in the best of all possible worlds. His philosophy also rests on the principle of sufficient reason, according to which nothing exists or occurs without a reason why it is so and not otherwise.

Leibniz advocated for the integration of scientific disciplines and the development of a universal language of thought. He participated in the founding of the Berlin Academy of Sciences in 1700.

His ideas strongly influenced Immanuel Kant, German idealism, modern logic, and the philosophy of science. Leibniz's endeavor to reconcile reason, faith, and scientific inquiry remains one of the most ambitious projects of modern philosophy.