Philosophiæ Naturalis Principia Mathematica

Philosophiæ Naturalis Principia Mathematica is widely regarded as the most consequential scientific work in history. In it, Isaac Newton unified terrestrial and celestial mechanics under a single theoretical framework, demonstrating that the same laws of motion and universal gravitation govern both the fall of an apple and the orbit of a planet. By applying calculus to the problems of physics, Newton defined the methods and ambitions of modern science for two centuries to come.

Published in 1687 with the financial support and encouragement of Edmond Halley, the Principia resolved the mysteries posed by Kepler's laws of planetary motion and provided the mathematical foundation upon which the entire edifice of classical mechanics would be built. The work made possible the Enlightenment's confidence in human reason as a tool for unlocking the secrets of the natural world. Although Einstein's theory of relativity eventually superseded Newtonian mechanics at extreme scales and velocities, the Principia remains foundational to physics and mathematics education worldwide.