_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.
The first salient characteristic in hereditary alcoholism is the precocious taste for intoxicants; secondly, the susceptibility to alcohol, which is infinitely more injurious to the offspring of inebriates than to normal individuals; and thirdly, the growth of the craving for strong drinks, which inevitably undermine the constitution.
_Direct Heredity._ The effects of direct heredity are still more serious, for they are aggravated by environment and education. Official statistics show that 20% of juvenile offenders belong to families of doubtful reputation and 26% to those whose reputation is thoroughly bad. The criminal Galletto, a native of Marseilles, was the nephew of the equally ferocious anthropophagous violator of women, Orsolano. Dumollar was the son of a murderer; Patetot's grandfather and great-grandfather were in prison, as were the grandfathers and fathers of Papa, Crocco, Serravalle and Cavallante, Comptois and Lempave; the parents of the celebrated female thief Sans Refus, were both thieves.
The genealogical study of certain families has shown that there are whole generations, almost all the members of which belong to the ranks of crime, insanity, and prostitution (this last being amongst women the equivalent of criminality amongst men). A striking example is furnished by the notorious Jukes family, with 77 criminal descendants.