Newton's groundbreaking work, *Philosophiæ Naturalis Principia Mathematica*, laid out the foundations of classical mechanics, which is based on the idea that the universe operates according to precise mathematical laws. He formulated his famous laws of motion and universal gravitation, which explained the movement of celestial bodies and objects on Earth.
However, it's important to note that the concept of mathematical laws governing the universe existed before Newton. Pythagoras, for example, believed that the universe was governed by numerical relationships. Galileo Galilei also emphasized the importance of mathematics in describing the natural world.
Newton's work was a major turning point in the development of this idea, though. His contributions provided a robust mathematical framework that allowed scientists to understand and predict natural phenomena with unprecedented accuracy.
Therefore, while many scientists contributed to this concept, Isaac Newton is considered the most influential figure in establishing the idea that mathematical laws govern the universe.