This is one of those truly unfortunate cases which, so far as present knowledge goes, cannot be guarded against. Eunice, age 31, mentally 2, is a low-grade imbecile. There is not in the whole family, for generations back, a single case of feeble-mindedness, nor of disease that would undermine the nervous organization. Close scrutiny does not reveal a single assignable cause. She came, as an accident, to blight an otherwise normal family.

Such cases are few, but unfortunately they do occur. It is for Eugenics to materially reduce the possibility of such occurrences.