64:6.25 (725.6) 6. The indigo race. As the red men were the most advanced of all the Sangik peoples, so the black men were the least progressive. They were the last to migrate from their highland homes. They journeyed to Africa, taking possession of the continent, and have ever since remained there except when they have been forcibly taken away, from age to age, as slaves.
64:6.26 (725.7) Isolated in Africa, the indigo peoples, like the red man, received little or none of the race elevation which would have been derived from the infusion of the Adamic stock. Alone in Africa, the indigo race made little advancement until the days of Orvonon, when they experienced a great spiritual awakening. While they later almost entirely forgot the “God of Gods” proclaimed by Orvonon, they did not entirely lose the desire to worship the Unknown; at least they maintained a form of worship up to a few thousand years ago.
64:6.27 (725.8) Notwithstanding their backwardness, these indigo peoples have exactly the same standing before the celestial powers as any other earthly race.
64:7.13 (728.2) The superior races sought the northern or temperate climes, while the orange, green, and indigo races successively gravitated to Africa over the newly elevated land bridge which separated the westward retreating Mediterranean from the Indian Ocean.
64:7.14 (728.3) The last of the Sangik peoples to migrate from their center of race origin was the indigo man. About the time the green man was killing off the orange race in Egypt and greatly weakening himself in so doing, the great black exodus started south through Palestine along the coast; and later, when these physically strong indigo peoples overran Egypt, they wiped the green man out of existence by sheer force of numbers. These indigo races absorbed the remnants of the orange man and much of the stock of the green man, and certain of the indigo tribes were considerably improved by this racial amalgamation.
64:7.15 (728.4) And so it appears that Egypt was first dominated by the orange man, then by the green, followed by the indigo (black) man, and still later by a mongrel race of indigo, blue, and modified green men. But long before Adam arrived, the blue men of Europe and the mixed races of Arabia had driven the indigo race out of Egypt and far south on the African continent.
78:1.10 (869.6) 8. The Sahara civilization. The superior elements of the indigo race had their most progressive settlements in what is now the great Sahara desert. This indigo-black group carried extensive strains of the submerged orange and green races.