Present-day prejudice against “half-castes,” “hybrids,” and “mongrels” arises because modern racial crossbreeding is, for the greater part, between the grossly inferior strains of the races concerned. [1]
It would not prove beneficial for the higher strains of Urantia mortals to mate with the lower races; such an unwise procedure would jeopardize all civilization on the world. we must now work out the planetary problem of race improvement by other methods of adaptation. [2]