But in most cases it isn't the drug addiction that causes the degeneracy; it is the degeneracy or the neuropathic or psychopathic constitution that causes the drug addiction. And such cases are bad matrimonial risks. And it is a very risky thing for a woman to marry an addict with the idea of reforming him. As I said about the alcoholic: Let him reform first, let him stay reformed for a few years, and then the rest is not so great. =Consanguineous Marriages= Consanguinity means blood relationship, and consanguineous marriages are marriages between near blood relatives. The physician is frequently consulted as to the permissibility or danger of marriages between near relations. The question generally concerns first cousins, second cousins, uncle and niece, and nephew and aunt. The popular idea is that consanguineous marriages are bad _per se_. The children of near relatives, such as first cousins, are apt to be defective, deaf and dumb, blind, or feebleminded, and what not. This popular idea, as so many popular ideas are, is wrong. And still there is of course, as there always is, some foundation for it. The matter, however, is quite simple. We know that many traits, good and bad, are transmitted by heredity. And naturally when traits are possessed by both father and mother they stand a much greater chance of being transmitted to the offspring than if possessed by one of the parents alone. Now then, if a certain bad trait, such as epilepsy or insanity, is present in a family that trait is present in both cousins, and the likelihood of children from such a marriage inheriting that trait is much greater than when the parents are strangers, the taint being present in the family of only one of the parents. But if there be no hereditary taint in the cousins' family, and, still more, if the family is an intelligent one, if there are geniuses in the family, then there cannot be the slightest objection to marriage between cousins, and the children of such marriages are apt to inherit in a strong degree the talents or genius of their ancestors. In short, if the family is a bad one, one below par, then marriage between cousins or between uncle and niece should be forbidden. If the family is a good one, above par, then marriage between relatives of that family should be encouraged.