It has been shown that they are more fertile than any other classes because of the very defect that makes them a danger to society.
The defective restraint that allows them to commit offences against person and property, also allows their procreative impulse unrestrained activity.
Defectives, therefore, are not only fertile, but they propagate their kind, and a few examples will serve to show to some extent the fertility, and to an enormous extent the hereditary tendencies, of the unfit.
