The Eugenic Rule Regarding Heredity.
It is one of the cardinal principles of Eugenics that those with a bad family history should not become parents. By this it is not meant that the manifestation of undesirable tendencies, physical, mental, and moral, on the part of certain individuals of a family necessarily constitutes a "bad family history." On the contrary, many of the best families have, from time to time, individuals who manifest undesirable tendencies, and who are in general out of harmony with the general family standard. It is an old axiom that "there is a black sheep in every flock"; and the flock must be measured by its general standard, and not by its exceptional black sheep.
A "bad family history" is one in which the family has clearly manifested certain undesirable physical, mental, and moral traits in a marked degree, and in a sufficient number of instances to establish a standard. Some families have a "bad family history" for inebriety; others for epilepsy; others for licentiousness; others for dishonesty—the history extending over several generations, and including a marked number of individuals in each generation. Individuals of such a family should refrain from bearing children; and if children be born to such the greatest care should be exercised by the parents in the matter of surrounding the child with the environment least calculated to "draw out" the undesirable characteristic. The child has a right to be well born, and to be protected from being brought into the world subjected to the handicap of a "bad family history." If individuals cannot endow their children with a good family history, they should refrain from bearing children—such is the Eugenic advice on the subject.
The same rule applies to the question of "acquired characteristics" of the parents—especially those acquired characteristics which are especially active at or just before the time of the contemplated conception. Though the family history of both husband and wife be ever so good, it is held that if one or both of the parents have acquired undesirable and transmissible characteristics, physical, mental, or moral, then the question of bringing children into the world should be carefully considered, and conscientiously decided, after competent authorities have been consulted concerning the case. The prospective child should always be given the benefit of the doubt in such cases. To bring children into the world merely to gratify personal pleasure or pride, regardless of the welfare of the child, is something utterly unworthy of an intelligent and moral human being.