51:4.4

The evolution of six—or of three—colored races, while seeming to deteriorate the original endowment of the red man, provides certain very desirable variations in mortal types and affords an otherwise unattainable expression of diverse human potentials. These modifications are beneficial to the progress of mankind as a whole provided they are subsequently upstepped by the imported Adamic or violet race. On Urantia this usual plan of amalgamation was not extensively carried out, and this failure to execute the plan of race evolution makes it impossible for you to understand very much about the status of these peoples on an average inhabited planet by observing the remnants of these early races on your world.