Man and Ape—Their Physical Relations—Their Mental Relations—Evolution was the Means—Who was the Progenitor of the Ape?—The Scale of Life.

If we could free our hands from the manacles of tradition and stand aloof from our prejudices, and look the stern facts in the face, we should be compelled to admit that between man and ape there is such a unity of design, structure and function, that we dare not in the light of reason deny to the ape that rank in Nature to which he is assigned by virtue of these facts. Physiologically, there is no hiatus between man and ape which may not be spanned by such evidence as would be admitted under the strictest rules of interpretation. We may briefly compare these two creatures in a broad and general way, so that the unscientific and casual reader may comprehend.

The skeleton of man is only the polished structure of which that of the ape is the rough model. The identity of the two, part by part, is as much the same as the light sulky is the outgrowth of the massive framework of the old-time cart. Whether man and ape are related by any ties of blood or not, it is evident that they were modelled on the same plan, provided with the same means, and designed for like purposes, whatever they may be. The organs of sensation and the functions which they discharge are the same in both, and the same external forces addressing themselves thereto produce the same results. I do not mean to say that the same organ in each is developed in the same degree as that in the other, for this is not the case even in different individuals of the same kind. In the muscular system of the one is found an exact duplicate of the other, except in such slight changes of model as will better adapt the parts to those conditions of life under which the animal having them may be placed, and through the whole physical structure of both we find that unity of part and purpose in structure and function, in bone, muscle, nerve, and brain. It has been shown beyond a reasonable doubt that the brain in the higher races of mankind has reached its present form through a series of changes which are constant and definite; and this organ in the lower types of man resembles more that of the ape than does the same organ in the higher types of man; and by a method of deduction, such as we use to determine the height of a tree or the width of a stream by the length of a shadow, we find that the fiducial lines which bound the planes in the perspective of man's cerebral growth, likewise embrace those of the ape. While it is a fact that the mind of man so far transcends that of the ape, it is also a fact that in reaching this condition it has passed through such planes as those now occupied by the ape. The physical changes of man's brain do not appear to keep pace with the growth of his mind. This may be a paradox, but the evidence upon which it rests is ample to sustain it.

I do not pretend to know whether man was evolved from ape, or ape from man; whether they are congenetic products of a common authorship, or the masterpieces of two rival authors; but I cannot see in what respect man's identity would be affected, whatever may be the case. If it be shown that man descended from the ape, it does not change the facts which have existed from the beginning, nor does it change the destiny to which he is assigned. If it can be shown that apes descended from man, it does not leave upon man the censure for this degeneracy. If man has risen from the low plane of brutehood which the ape now occupies, has scaled the barriers which now separate him from apes, and has climbed to the divine heights of mental and moral manhood, the ape deserves no praise for this. On the other hand, if apes have fallen from the state of man, have wandered so far from the gates of light, and are now wandering in the twilight of intellect and degradation, it is no reproach to man; and while I shall not sit in judgment in the cause, nor testify on either side, I am willing to accept whatever verdict may be founded on the real facts, and I shall not appeal therefrom. But I shall not allow my prejudice to conceal the truth, whenever it is shown to me. It is always acceptable to my mind, and, stripped of all sophistry and oblique conditions, it would appear the same to every mind.

That evolution is the mode by which the world was peopled, there is little doubt, but there are many details yet unsettled as to the manner in which this was effected. I cannot regard the matter as proven beyond appeal that man has come from any antecedent type that was not man, nor yet do I deny that such may be the case; but I do deny that the broad chasm which separates man from other primates cannot be crossed on the bridge of speech; and while this does not prove their identity or common origin, it does show that Nature did not intend that either one should monopolise any gift which she had to bestow. It is as reasonable to believe that man has always occupied a sphere of life apart from that of apes, as to believe that apes have occupied a sphere of life apart from birds, except that the distance from centre to centre is greater between birds and apes than that distance between apes and man. So far as any fossil proofs contribute to our knowledge, we find no point at which the line is crossed in either case; and the earliest traces of man's physiological history find him distinctly man, and this history reaches back on meagre evidence many, many centuries before historic time. Among these earlier remains of man, we find no fossils of the Simian type to show that he existed at that time; but at a somewhat later period we find some remnants of the Simian type in deposits of Southern Europe; but they are of the smaller tribes, and have been assigned to the Macacus. We cannot trace the history of this genus from that to the present time to ascertain whether they were the progenitors of apes or not; but between this type and that of apes the hiatus is as broad as that which intervenes between the ape and man.

That somewhere in the lapse of time all genera began, admits of no debate; and by inversion it is plain that all generic outlines must focus at the point from which they first diverged, and such an operation does not indicate that man and Simian have ever been more closely allied than they are at the present time; but the evidence is clear that man has been evolved from a lower plane than he now occupies. The inference may be safely applied to apes, as progress is the universal law of life.

The question has been asked, "Who is the progenitor of man?" The solution of this problem has engaged the most profound minds of modern time. If it be said in reply that apes were the progenitors of man, the question then arises, "Who was the progenitor of the ape?" If it be said that man and ape had a common progenitor, a like question arises, and it becomes necessary to connect all types allied to each other as these two types are physically allied. If man is the climax of a great scheme in Nature by which one type is gradually transformed into another, we must descend the scale of life by crossing the chasm which lies between mankind and apes, another lying between the apes and monkeys, another between the monkeys and baboons, another between the baboons and lemurs, and yet another between the lemurs and the lemuroids, and thus from form to form like islands in the great sea of life. From man to infinity the question constantly recurs, and over each hiatus must be built a separate bridge.

Darwin has given to the world the most profound and conscientious work, and from the chaos and confusion of human ignorance and bigotry has erected the most sublime monuments of thought and truth. It does not detract from his character and honesty, nor lessen the value of his labours, to admit that he may have been mistaken in some conclusions which he deduced from the great store of facts at his command.

It is not the purpose of this work, however, to enter into a discussion of any theory aside from speech and its possible origin and growth, but all subjects pertaining to life, thought, and the modes of living and thinking, must contribute in some degree to a clear understanding of the subject in hand.

It has been a matter of surprise to me that so careful and observant a man as Mr. Darwin should have so nearly omitted the question of speech from a work of such ample scope, such minute detail, and such infinite care as characterises the "Descent of Man," and such like works. But science will cheerfully forgive an error, and pardon the sin of omission in one who has given to the world so much good.