There had been a brief flurry of starship launchings as colonies of black people, brown, white, and yellow people were hurled into the sky toward the Centaur, in the name of racism. Afterwards, geneticists had wryly demonstrated that – since each racial group was so small that unless their descendants intermarried, each would undergo deteriorative genetic drift due to inbreeding on the colony planet – the racists had made crossbreeding necessary to survival.
