Such a rich store of myths enfolds Paul Muad'dib, the Mentat Emperor, and his sister, Alia, it is difficult to see the real persons behind these veils. But there were, after all, a man born Paul Atreides and a woman born Alia. Their flesh was subject to space and time. And even though their oracular powers placed them beyond the usual limits of time and space, they came from human stock. They experienced real events which left real traces upon a real universe. To understand them, it must be seen that their catastrophe was the catastrophe of all mankind. This work is dedicated, then, not to Muad'dib or his sister, but to their heirs -- to all of us.