"To one at all familiar with the external aspect of insanity in its various forms, it seems incredible that its physical nature was not sooner realized. Had the laws of heredity been earlier understood, it would have been seen that mental derangements, like physical diseases and tendencies, were transmitted."--Prof. Edward S. Morse.
If placed in the cradles of luxury, would not all trace of mental, moral and physical heredity of a fortunate type disappear from the darlings of Murray Hill in their adopted environment of squalor and vice; and would not the haggard and half-starved, ill-nurtured waifs of Mulberry Bend blossom as the rose in strength and virtue in their new environment of luxury and of wholesome and healthful surroundings? Just here a digression seems necessary; for while I have no doubt that the change (even on the terms usually implied) would work wonders in both sets of infants, still it is to be remembered that for such a test to tell anything of real value to science, the exchange would need to be made upon another basis from that which is generally used as an argument, because it is incorrectly assumed that the children of luxury (as a rule) are born with clean and lofty heredity. This is, alas, so far from the case that it is almost a truism that "the highest and the lowest" (meaning the richest and the poorest) are "nearest together in action and farthest apart in appearance, only." They both frequently give to their children tainted mental, moral and physical natures with which to contend. The self-indulgence of the young men of the "upper classes" leaves a burned-out, undermined and tainted physical heredity almost a certainty for their children, while the ethical tone of such men--their moral fibre--is higher only in appearance and the ability to do secretly that which puts the tough of Mulberry Bend in the penitentiary because he has not the gold to gild his vices and to dazzle the eyes of society. The exchanged children, therefore, would not be so totally different in inherited qualities, after all. They would have alike a tainted ancestry. Their physical natures are the hotbeds of vices or diseases that are to be developed or curbed according as environment shall determine. But the foundation in both cases--the ground--both mental, moral and physical, is sowed down and harrowed in with the tainted heredity. The mother in both instances, as a rule, is but an aimless puppet who dances to the tune played by her male owner--a mere weak transmitter or adjunct of and for and to his scale of life. Therefore to point to the fact that to change these classes of infants in the cradle is to exchange (by means of their environment only) their mature development, also, from that of a Wall Street magnate to a Sing Sing convict, tells nothing whatever against the power and force of heredity. It tells only what is always claimed for fortunate or unfortunate environment--that "It gilds the straitened forehead of the fool," or that