No More Learning

"[75]

From cases of this sort, which           the least striking kind of bad
breeding, the student may pass through many types up to the great tribes
of Jukes, Nams, Kallikaks, Zeros, Dacks, Ishmaels, Sixties, Hickories,
Hill Folk, Piney Folk, and the rest, with which the readers of the
literature of restrictive eugenics are familiar.