In a popular magazine there is one of the usual articles about criminology; about whether wicked men could be made good if their heads were taken to pieces. As by far the wickedest men I know of are much too rich and powerful ever to submit to the process, the speculation leaves me cold. I always notice with pain, however, a curious absence of the portraits of living millionaires from such galleries of awful examples; most of the portraits in which we are called upon to remark the line of the nose or the curve of the forehead appear to be the portraits of ordinary sane men, who stole because they were hungry or killed because they were in a rage. The physical peculiarity seems to vary infinitely; sometimes it is the remarkable square head, sometimes it is the unmistakable round head; sometimes the learned draw attention to the abnormal development, sometimes to the striking deficiency of the back of the head. I have tried to discover what is the invariable factor, the one permanent mark of the scientific criminal type; after exhaustive classification I have come to the conclusion that it consists in being poor.

-Alarms and Discursions (1910)