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>The harsh condition of the desert has shaped the Fremen faith. The Dune and Muad'dib's Ethos Is built on this sense of scarcity and fear. The open erg is not supportive but profoundly threatening – an enemy to be tamed, civilized and controlled. To overcome these circumstances, the desert dweller looks for relief from a Voice from the Other World. Desert people crave greenery so much that it is their sacred color (as in the Atreides flag).