V
First Stages in the Genesis of Man
Let us begin by drawing a correct though slight outline sketch of what the cosmic process of evolution has been. It is not strange that when biologists speak of evolution they should often or usually have in mind simply the modifications wrought in plants and animals by means of natural selection. For it was by calling attention to such modifications that Darwin discovered a true cause of the origin of species by physiological descent from allied species. Thus was demonstrated the fact of evolution in its most important province; men of science were convinced that the higher forms of life are derived from lower forms, and the old notion of special creations was exploded once and forever. This was a great scientific achievement, one of the greatest known to history, and it is therefore not strange that language should often be employed as if Evolutionism and Darwinism were synonymous. Yet not only are there extensive regions in the doctrine of evolution about which Darwin knew very little, but even as regards the genesis of species his theory was never developed in his own hands so far as to account satisfactorily for the genesis of man.
It must be borne in mind that while the natural selection of physical variations will go far toward explaining the characteristics of all the plants and all the beasts in the world, it remains powerless to account for the existence of man. Natural selection of physical variations might go on for a dozen eternities without any other visible result than new forms of plant and beast in endless and meaningless succession. The physical variations by which man is distinguished from apes are not great. His physical relationship with the ape is closer than that between cat and dog, which belong to different families of the same order; it is more like that between cat and leopard, or between dog and fox, different genera in the same family. But the moment we consider the minds of man and ape, the gap between the two is immeasurable. Mr. Mivart has truly said that, with regard to their total value in nature, the difference between man and ape transcends the difference between ape and blade of grass. I should be disposed to go further and say, that while for zoölogical man you can hardly erect a distinct family from that of the chimpanzee and orang, on the other hand, for psychological man you must erect a distinct kingdom; nay, you must even dichotomize the universe, putting Man on one side and all things else on the other. How can this overwhelming contrast between psychical and physical difference be accounted for? The clue was furnished by Alfred Russel Wallace, the illustrious co-discoverer of natural selection. Wallace saw that along with the general development of mammalian intelligence a point must have been reached in the history of one of the primates, when variations of intelligence were more profitable to him than variations in body. From that time forth that primate's intelligence went on by slow increments acquiring new capacity, while his body changed but little. When once he could strike fire, and chip a flint, and use a club, and strip off the bear's hide to cover himself, there was clearly no further use in thickening his own hide, or lengthening and sharpening his claws. Natural selection is the keenest capitalist in the universe; she never loses an instant in seizing the most profitable place for investment, and her judgment is never at fault. Forthwith, for a million years or more she invested all her capital in the psychical variations of this favoured primate, making little change in his body except so far as to aid in the general result, until by and by something like human intelligence of a low grade, like that of the Australian or the Andaman islander, was achieved. The genesis of humanity was by no means yet completed, but an enormous gulf had been crossed.
After throwing out this luminous suggestion Mr. Wallace never followed it up as it admitted and deserved. It is too much to expect one man to do everything, and his splendid studies in the geographical distribution of organisms may well have left him little time for work in this direction. Who can fail to see that the selection of psychical variations, to the comparative neglect of physical variations, was the opening of a new and greater act in the drama of creation? Since that new departure the Creator's highest work has consisted not in bringing forth new types of body, but in expanding and perfecting the psychical attributes of the one creature in whose life those attributes have begun to acquire predominance. Along this human line of ascent there is no occasion for any further genesis of species, all future progress must continue to be not zoölogical, but psychological, organic evolution gives place to civilization. Thus in the long series of organic beings Man is the last; the cosmic process, having once evolved this masterpiece, could thenceforth do nothing better than to perfect him.
VI
The Central Fact in the Genesis of Man
