After the highest of all the gods becomes dissatisfied with how the lesser gods are ruling, he tells them they must each pick a champion from among their people, and have him lead a war against the other people.
After HE, the highest of all the gods, becomes dissatisfied with how the lesser gods are ruling, HE tells them they must each pick a champion from among their people, and have him lead a war against the other peoples, with the gods of the losing races facing an arduous and absurd punishment. And so Jupiter, Horus, and Ch'ih-Yu must develop their civilisations in an attempt to defeat one another.