From 2500 to 2000 B.C. the nomads were on a rampage from the Atlantic to the Pacific. The Nerites constituted the final eruption of the Caspian group of the Mesopotamian descendants of the blended Andonite and Andite races. What the barbarians failed to do to effect the ruination of Mesopotamia, subsequent climatic changes succeeded in accomplishing.

And this is the story of the violet race after the days of Adam and of the fate of their homeland between the Tigris and Euphrates. Their ancient civilization finally fell due to the emigration of superior peoples and the immigration of their inferior neighbors. But long before the barbarian cavalrymen conquered the valley, much of the Garden culture had spread to Asia, Africa, and Europe, there to produce the ferments which have resulted in the twentieth-century civilization of Urantia.