Afghans, North American Indians, &c. Diodorus Siculus, writing upon the morals of the Gauls, deserves attention in this respect.[1] It is also singular to find that the Norman marauders of the tenth century carried unnatural vices wherever they appeared in Europe.[2] The Abbot of Clairvaux, as quoted by Lombroso (p. 43), accused them of spreading their brutal habits through society. People accustomed to look upon these vices as a form of corruption in great cities will perhaps be surprised to find them prevalent among nomadic and warlike tribes. But, in addition to survival from half-savage periods of social life, the necessities of warriors thrown together with an insufficiency of women must be considered. I have already suggested that Greek love grew into a custom during the Dorian migration and the conquest of Crete and Peloponnesus by bands of soldiers.
Cannibalism, Lombroso points out (p. 68), originated in necessity, became consecrated by religion, and finally remained as custom and a form of gluttony. The same process of reasoning, when applied to sexual aberrations, helps us to understand how a non-ethical habit, based on scarcity of women, survived as a social and chivalrous institution among the civilised Hellenes.
Lombroso traces the growth of justice in criminal affairs, and the establishment of pains and penalties, up to the instinct of revenge and the despotic selfishness of chiefs in whom the whole property of savage
