Force
Sir Isaac Newton described the motion of all objects using the concepts of inertia and force, and in doing so he found they obey certain conservation laws. In 1687, Newton published his thesis "Philosophiæ Naturalis Principia Mathematica". In this work Newton set out three laws of motion that to this day are the way forces are described in physics.
The Force
Astrophysicist Jeanne Cavelos says in "The Science of Star Wars" that the Force raises questions that scientists have long asked. She points out that the ancient Greeks explored the idea of a "fifth element" that permeated and connected everything in the universe, and that Isaac Newton proposed that the human brain might be able to trigger waves in the ether, giving humans psychic powers. Cavelos's sources are mostly skeptical about a "real world" explanation for the Force, but they explore ideas in areas such as quantum physics, parapsychology, and the notion of science so advanced that it appears magical. Explaining the Force is particularly difficult, Cavelos says, because "it does so many different things". Several scientists have said it is best not to try to explain how the Force works.