Analysis of information sources in references of the Wikipedia article "Hermann Joseph Muller" in English language version.
There is no scientific basis for the conclusion that the socially lower class have genetically inferior intellectual equipment. Certain slum districts of our cities are factories for criminality among those who happen to be born in them. Under these circumstances, it is society, not the individual, which is the real criminal and which stands to be judged. Eugenics might yet perfect the human race, but only in a society consciously organized for the common good.