In Greek mythology, Moros/ˈmɔrɒs/ or Morus/ˈmɔrəs/ (Greek: Μόρος, "doom, fate") is the personification of impending doom, who drives mortals to their deadly fate. He is one of the offspring of Nyx (Night), who had conceived him without male intervention, and brother of the Moirai (Fates). It was even proclaimed by the Fates that not even Zeus could question Moros (destiny), who like his mother, Nyx, was invisible and dark. To break with destiny was to reintroduce Chaos into the world. Even if Zeus issued a decree or made a promise he later regretted, he could not then change his decree because it was destiny. In which case, he was the only force that Zeus truly dreaded. Because of this, Moros was also considered to be omnipotent, omniscient, and omnipresent. Aeschylus describes how Prometheus saved mankind from the misery of seeing their doom (Moros) with the gift of hope (Elpis). Moros' siblings Thanatos and Ker represented the physical aspects of death—Ker was the bringer of violent death and killing sickness, while Thanatos represented a peaceful, passing away.