In this remarkable book, the author challenges the traditional definition of motion. He contends that matter and motion are fundamentally inseparable. At each level of matter's hierarchy - particles, atoms, gravitating systems - motion is a structural feature; and as objects move in space, they behave as components conforming to a basic composition of kinematic systems. With motion thus defined, he reexamines with astonishing results the theories for the structure of particles and the origin of the universe.