The ætiology of crime, therefore, mingles with that of all kinds of degeneration: rickets, deafness, monstrosity, hairiness, and cretinism, of which crime is only a variation. It has, however, always been regarded as a thing apart, owing to a general instinctive repugnance to admit that a phenomenon, whose extrinsications are so extensive and penetrate every fibre of social life, derives, in fact, from the same causes as socially insignificant forms like rickets, sterility, etc. But this repugnance is really only a sensory illusion, like many others of widely diverse nature. =FIG. 23 ART PRODUCTION FROM PRISON (see page 135)= =FIG. 24 A COMBAT BETWEEN BRIGANDS AND GENDARMES Designed by a Criminal (see page 135)= _Pathological Origin of Crime._ The atavistic origin of crime is certainly one of the most important discoveries of criminal anthropology, but it is important only theoretically, since it merely explains the phenomenon. Anthropologists soon realised how necessary it was to supplement this discovery by that of the origin, or causes which call forth in certain individuals these atavistic or criminal instincts, for it is the immediate causes that constitute the practical nucleus of the problem and it is their removal that renders possible the cure of the disease. These causes are divided into organic and external factors of crime: the former remote and deeply rooted, the latter momentary but frequently determining the criminal act, and both closely related and fused together. Heredity is the principal organic cause of criminal tendencies. It may be divided into two classes: indirect heredity from a generically degenerate family with frequent cases of insanity, deafness, syphilis, epilepsy, and alcoholism among its members; direct heredity from criminal parentage. _Indirect Heredity._ Almost all forms of chronic, constitutional diseases, especially those of a nervous character: chorea, sciatica, hysteria, insanity, and above all, epilepsy, may give rise to criminality in the descendants. Of 559 soldiers convicted of offences, examined by Brancaleone Ribaudo, 10% had epileptic parents. According to Dejerine, this figure reaches 74.6% among criminal epileptics. Arthritis and gout have been known to generate criminality in the descendants. But the most serious, and at the same time most common, form of indirect heredity is alcoholism, which, contrary to general belief, wreaks destruction in all classes of society, amongst the rich and poor without distinction of sex, for alcohol may insinuate itself everywhere under the most refined and pleasant disguises, in liqueurs, sweets, and coffee. According to calculations made by my father, 20% of Italian criminals descend from inebriate families; according to Penta the percentage is 27 and in dangerous criminals, 33%. The Jukes family, of whom we shall speak later, descended from a drunkard.