In archaic and traditional societies, the surrounding world is conceived as a microcosm. At the limits of this closed world begins the domain of the unknown, of the formless. On this side there is ordered - because of inhabited and organized - space; on the other, outside this familiar space, there is the unknown and dangerous region of the demons, the ghosts, and the dead and foreigners - in a world, chaos or death or night. This image of an inhabited microcosm, surrounded by desert regions as a chaos or a kingdom of the dead, has survived even in highly evolved civilizations such as those of China, Mesopotamia and Egypt.