In our modern revolt against the mediaeval notions of hereditary honor and hereditary shame we have gone too far, for we have lost the appreciation of the true dependence of children on parents. We have a glib phrase about "the accident of birth," but it would puzzle anybody to tell what it means. If A takes B to wife, it is not an accident that he took B rather than C, D, or any other woman; and if A and B have a child, X, that child's ties to ancestry and posterity, and his relations to the human race, into which he has been born through A and B, are in no sense accidental. The child's interest in the question whether A should have married B or C is as material as anything one can conceive of, and the fortune which made X the son of A, and not of another man, is the most material fact in his destiny. If those things were better understood public opinion about the ethics of marriage and parentage would undergo a most salutary change. In following the modern tendency of opinion we have lost sight of the due responsibility of parents, and our legislation has thrown upon some parents the responsibility, not only of their own children, but of those of others. The relation of parents and children is the only case of sacrifice in Nature. Elsewhere equivalence of exchange prevails rigorously. The parents, however, hand down to their children the return for all which they had themselves inherited from their ancestors. They ought to hand down the inheritance with increase. It is by this relation that the human race keeps up a constantly advancing contest with Nature. The penalty of ceasing an aggressive behavior toward the hardships of life on the part of mankind is, that we go backward. We cannot stand still. Now, parental affection constitutes the personal motive which drives every man in his place to an aggressive and conquering policy toward the limiting conditions of human life. Affection for wife and children is also the greatest motive to social ambition and personal self-respect--that is, to what is technically called a "high standard of living."