There are two factors, it must be remembered, in criminal heredity, as we commonly use the expression. There is the element of innate disposition, and there is the element of contagion from social environment. Both these factors clearly had their part in Sbro ... who is regarded by Lombroso as the classical type of “moral insanity.” His grandfather had committed murder from jealousy; his father, condemned for rape, had killed a woman to test a gun. He in his turn killed his father and his brother. Practically, it is not always possible to disentangle these two factors; a bad home will usually mean something bad in the heredity in the strict sense. Frequently the one element alone, whether the heredity or the contagion, is not sufficient to determine the child in the direction of crime. A case given by Prosper Lucas seems to show this: “In November 1845 the Assize Court of the Seine condemned three members out of five of a family of thieves, the Robert family. This case presented a circumstance worthy of remark. The father had not found among all his children the disposition that he would have desired; he had to use force with his wife and the two younger children, who up to the last were rebellious to his infamous orders. The eldest daughter, on the other hand, followed, as if by instinct, her father’s example, and was as ardent and violent as he in attempting to bend the family to his odious tastes. But in one part of the family the instinct was lacking; they inherited from their mother.”