The little-understood native population of Arrakis are the Fremen, long overlooked by the Imperium. Considered backward savages, the Fremen are an extremely hardy people and exist in large numbers, their culture built around the commodity of water, which is extremely scarce on Arrakis. The Fremen await the coming of a prophesied messiah, not suspecting that this prophecy had been planted in their legends by the Missionaria Protectiva, an arm of the Bene Gesserit dedicated to religious manipulation to ease the path of the Sisterhood when necessary. In "Dune", the so-called "Arrakis Affair" puts unexpected Kwisatz Haderach Paul Atreides in control of first the Fremen people and then Arrakis itself. Absolute control over the spice supply allows Paul to depose Shaddam and become ruler of the known universe, with Shaddam's eldest daughter Princess Irulan as his consort. With a bloody jihad subsequently unleashed across the universe in Paul's name but out of his control, the Bene Gesserit, Tleilaxu, Spacing Guild, and House Corrino conspire to dethrone him in "Dune Messiah" (1969). Though the plot fails, the Atreides Empire continues to devolve in "Children of Dune" (1976) as the religion built around Paul falters, Irulan's sister Wensicia conspires to place her son Farad'n on the throne, and Paul's twin heirs Leto II and Ghanima rise to power.