Isaac Newton is renowned for his formulation of the laws of motion, which were published in his seminal work, "Philosophiæ Naturalis Principia Mathematica," in 1687. His three laws—describing the relationship between a body and the forces acting on it—provided a foundation for classical mechanics. Newton's first law states that an object in motion stays in motion unless acted upon by a force. His second law introduces the concept of force as the product of mass and acceleration, while the third law posits that for every action, there is an equal and opposite reaction. Together, these laws revolutionized our understanding of physics.