"[T]radition links us with the revolutionary science of the Renaissance... we can distinguish... four major periods of advance. [1] [C]entred in Italy... the renewal of mechanics, anatomy, and astronomy with Leonardo, Vesalius, and Copernicus, destroying the authority of the Ancients in their central doctrines of man and the world. [2] [S]preading to the Low Countries, France, and Britain, beginning with Bacon, Galileo, and Descartes, and ending in Newton, hammered out a new mathematical mechanical model of the world. [3] [C]entred in industrial Britain and revolutionary Paris, opened... areas of experience... as... electricity... It was then that science could help... with power, machinery, and chemicals, to transform production and transport. [4] [T]he scientific revolution of our own time. ...[T]he beginning of a world science, transforming old and creating new industries, permeating every aspect of human life. ...[N]ow... we find science directly involved in the violent and terrible drama of wars and social revolution."