Prometheus Bound by Aeschylus

In the beginning, Ouranos and Gaia held sway over Heaven and Earth. And manifold children were born unto them, of whom were Cronos, and Okeanos, and the Titans, and the Giants. But Cronos cast down his father Ouranos, and ruled in his stead, until Zeus his son cast him down in his turn, and became King of Gods and men. Then were the Titans divided, for some had good will unto Cronos, and others unto Zeus; until Prometheus, son of the Titan lapetos, by wise counsel, gave the victory to Zeus....