Freiherr von Gottfried Wilhelm Leibniz

Born in Leipzig in 1646, Leibniz grew into one of Europe's great polymaths. He studied law, worked as a diplomat and political adviser, and spent much of his career in the service of the House of Hanover. Alongside public duties, he pursued an astonishing range of intellectual projects, from mathematics and mechanics to theology, history, and language.

He is widely remembered for developing calculus independently of Isaac Newton and for helping shape mathematical notation that is still used today, including the integral sign. But his writing reached far beyond mathematics. In philosophy, he is especially associated with the idea of monads, simple substances that make up reality, and with his attempt to explain how a rational, ordered universe could still contain suffering and imperfection.

Leibniz wrote with the confidence of someone who believed knowledge could be connected across every field. That wide, hopeful way of thinking is part of why he is still read: not only as a philosopher or mathematician, but as a writer who tried to see how logic, science, faith, and politics might fit together.