Four sources have been propounded for the study of psychogenesis. It has been said that to investigate the development of the human mind, the following objects must be scientifically observed: (1) The mind of a child; (2) the mind of the lower animals; (3) the survivals of the oldest culture, as we find it in ethnological collections; (4) the mind of still living savages. I formerly entertained similar hopes, but in my own melancholy experience all these studies end in delusion, in so far as they are applied to explain the [pg 120] genesis of the human mind. They do not reach far enough, they give us everywhere only the products of growth, the result of art, not the natural growth, or the real evolution. The observations on the development of a child's mind are very attractive, especially when they are made by thoughtful mothers. But this nursery psychology is wanting in all scientific exactness. The object of observation, the child that cannot yet speak, can never be entirely isolated. Its environment is of incalculable influence, and the petted child develops very differently from the neglected foundling. The early smile of the one is often as much a reflex action as the crying and blustering of the other, from hunger or inherited disease. Much as I admire the painstaking effort with which the first evidences of perception or of mental activity in a child have been recorded from day to day, from week to week, these observations prove untrustworthy when we endeavour to control them independently. It has been said that the mental activities of a child develop in the following order:—
After three weeks fear is manifested;
After seven weeks social affections;
After twelve weeks jealousy and anger;
After five months sympathy;
After eight months, pride, sentiment, love of ornament;
After fifteen months, shame, remorse, a sense of the ludicrous.[45]
We may generalise this scale as much as we please, and gradually permit the gradations to vanish, but I doubt if even two mothers could be found who would agree in such an interpretation of their children's looks. Add to this that this whole scale has very little to do with what, in the strict sense of the word, we call mind. From fear up to shame and penitence are all manifestations simply of the feelings, and not of the mind. We know that what we call fear is often a reflex action, as when a child closes its eyelids before a blow. What has been named jealousy in a child, is often nothing but hunger, while shame is instilled into one child, and in others is by no means of spontaneous growth.
The worst feature of such observations is that they are very quickly regarded as safe ground, and are reared higher and higher until in the end the entire scaffold collapses. In order to establish the truth of this psychologic scale in children still more firmly, and at the same time to make good its universal necessity, an effort has been made to prove that a similar scale is to be found in the animal kingdom, and of course what was sought has been found. Romanes asserts that the lowest order of animals, the annelids, only show traces of fear; a little higher in the scale, in insects, are found social instincts such as industry, combativeness, and curiosity; another step higher, fishes exhibit jealousy, and birds, sympathy; then in carnivorous animals follow cruelty, hate, and grief; and lastly, in the anthropoid apes, [pg 122] remorse, shame, and a sense of the ridiculous, as well as deceit. It needs but one step more to make this scale, which belongs much more to the sphere of feeling than the realm of thought, universally applicable to all psychology. How should we otherwise explain the parallelism between the mental development of infants and that of undeveloped animals? One need but take a firm hold of such observations, and they are transformed into airy visions. Who, for instance, would dare to distinguish the traces of fear in annelids from those of surprise in higher animals? Nevertheless fear occupies the first place, surprise the third. And what mark distinguished combativeness in insects from jealousy in fishes? In the same way I doubt if any two nurses would agree in the chronology of the phenomena of the infant disposition, and have therefore long since given up all hope of obtaining any hints either in embryological or physiological development, about the real historical unfolding of the human consciousness, either out of a nursery or out of a zoölogical garden.
As for ethnological museums, they certainly give us wonderful glimpses into the skilfulness of primitive man, especially in what relates to the struggle for life; but of the historic or prehistoric age of these wood, horn, and stone weapons, they tell us absolutely nothing. Whoever thinks that man descended from an ape, may no doubt say that flint implements for kindling fire belonged to a higher period, post hominem natum, although it has been [pg 123] thought that even apes could have imitated such weapons, though they could not have invented them. Romanes, in his book on Mental Evolution in Animals, has collected a large number of illustrations of animal skilfulness; the majority of them, however, are explained by mere mimicry; of a development of original ideas peculiar to animals in their wild state, apart from the contact and influence of human society, there is no trace. Even the most intelligent animal, the elephant, acquires reason only in its intercourse with men, and similarly the more or less trained apes, dogs, parrots, etc. All this is very interesting reading, and an English weekly, The Spectator, has from week to week given us similar anecdotes about wonderfully gifted animals from all parts of the earth, but these matters lie outside the narrow sphere of science.