Before his theft of fire, Prometheus played a decisive role in the Titanomachy, securing victory for Zeus and the other Olympians. Zeus' torture of Prometheus thus becomes a particularly harsh betrayal. The scope and character of Prometheus' transgressions against Zeus are also widened. In addition to giving humanity fire, Prometheus claims to have taught them the arts of civilisation, such as writing, mathematics, agriculture, medicine, and science. The Titan's greatest benefaction for humanity seems to have been saving them from complete destruction. In an apparent twist on the myth of the so-called Five Ages of Man found in Hesiod's "Works and Days" (wherein Cronus and, later, Zeus created and destroyed five successive races of humanity), Prometheus asserts that Zeus had wanted to obliterate the human race, but that he somehow stopped him.