The goal of the Enlightenment was to establish an authoritative ethics, aesthetics, and knowledge based on an "enlightened" rationality. The movement's leaders viewed themselves as a courageous, elite body of intellectuals who were leading the world toward progress, out of a long period of irrationality, superstition, and tyranny which began during a historical period they called the Dark Ages. This movement provided a framework for the American and French Revolutions, as well as the rise of capitalism and the birth of socialism.