// Wet ; '* THE UNITY OF MAHKIND. . -------------------•-<■■•■ ---------- AN INTRODUCTORY LECTURE, Helium!) before \\t €km OF THE MEDICAL DEPARTMENT, OF THE ST. LOUIS UNIVERSITY, By M. L. LINTON, M. D., Professor of the Theory and Practice of Medicine )PUBX,XS**)e)0 BY XJHUe CX»>P»,SS. SEfifSION" '34-35. ---------o-»—«>——----- ■ PRINTED AT THE MISSOURI DEMOCRAT OFFICE. CORRESPONDENCE. At a meeting of tho Medical Class of the St. Louis University, held in the Lecture Boom of the College, P. Young, was called to the chair, and A. Montgomery, appointed Secre- tary. The object of the meeting being stated it was unanimously resolved, that a commit- tee be appointed to solicit a copy of Prof. Lintok's Introductory Address for publication. The following gentlemen were appointed a committee for that purpose, A. Montgomery, G. Moreau Holt, and Jno. LeBrecht. St. Louis, Mo, Nov. 2d, 1854 Prof. Linton, Dear Sir, At a meeting of the Class of the Medical Department of the St. Louis University, the undersigned were appointed a committee to solicit the manuscript of your Introductory Address, delivered on the 31st ult. for publication. With assurances of high respect, we remain, Truly yours, A. MONTGOMERY, JOHN LrBRECHT, Q. MOREAU HOLT. St. Lotus, oth Nov. 1854. Gentlemev, Tho manuscript of the Introductory is subject at any time to your order. The Ad- dress was delivered with the hope that it would be of some service to the Medical Class, and I comply with pleasure with the request to permit its publication. Accept for yourselves, and tender to tho Class my sincerest assurance of regards, M. L. LINTON. McSSni. A. MOHTOOMERY, John LeBrecht, Q. Moreau Holt. ADDRESS. Gentlemen of the Medical Class : The natural history of mankind is intimately connected with the studies of the physician. The origin of the human species; the changes which it has undergone mentally and physically in the course of ages, and the causes which have produced these changes, are topics of interest to the non-medical as well as the medical public; and the discussion of them on this occasion will, I hope, be acceptable to those here assembled to hear an introductory lecture. Whence are we ? Are the millions of human beings who now peo- ple the earth, the descendants of one primeval pair; or are they the hybrid offspring of different species of a genus man, created at divers points and sundry times on the various continents and islands of our globe ? Is the old doctrine true, that all earth's denizens are the children of Adam and Eve, or is it but a remnant of superstition and a mark of old fogyism ? Has every country had its Adam and Eve, as young philosophy pretends in these latter days ? Is this old and universal belief—the faith of Christians, Jews, Mahomedans and even Pagans— the faith of all ages reaching back to the first records of history and the earliest whisperings of tradition, and forward to the middle of the nine- teenth century ; is this consent of nations and ages founded in truth, or is it to pass away as the baseless fabric of a vision, to make room for the daring speculations of a few modern freethinkers ? I believe in the old and universal doctrine, that all mankind have descended from one pair, as related in our earliest history ; and I shall proceed briefly to examine it, and the speculations to which it is op- posed, by the light of reason. Of course, all who believe the Penta- teuch, believe also the doctrine of the unity of the human race. But I do aot propose to examine the question theologically; I wish only to estimate the bearings of science upon it; to meet the objector on the ground chosen by himself. It is contended by the advocates of a plurality of origins, of multitudinous Adams and Eves, that men are too different in color, in form, in language and locality, to have de- scended from one pair. It is contended by them, that the diflferences observed amongst nations and races, are specific differences; that 4 there are many different species of mankind. On the other hand, the advocates of the old doctrine say, that all these differences of color, form, etc., are but variations induced on one original type, by climate, modes of living, and various other agencies. What is meant by the term species ? It would be well to settle the meaning of this term, before we enter the discussion of the ques- tion, as to whether mankind are of different species or but varieties of one species. We say, in common parlance, that there are different Rinds or species of plants and animals;, and we mean thereby, well marked differences which no combination of circumstances can change. The oak is different in kind or species from the willow; the rose from the magnolia; the beech from the walnut. The cat and dog are of different species or kinds; the turtledove differs in species from the albatross ; the whale from the shark. There may be hybrids between the more closely allied species or kinds, but these hybrids are them- selves unfruitful, and thus has nature provided a barrier against the chaos which would follow the indefinite mingling and transmutation of species. Now there are evidently no such wide and well marked differences between men as those mentioned of plants and animals; and those who contend that the Indian and the white man are of different species, rely upon those slight differences which may evidently exist in the same species. If fruitfulness inter se be a proof of specific ideutity, then, evidently, mankind are but one species; but if every philosopher is to use the term in his own sense, regardless of the consent of mankind and common usage, then the word ought to be erased from our lexi- cons. It is a remarkable fact that those who contend that specific differences exist amongst men, cannot agree about the number of the species into which the human family is divided. Now if these differ- ences were well marked and constant, there could be no difficulty in recognizing them. There is no difficulty in fixing the specific bound- aries of plants and animals; nor would there be in doino- the same with regard to mankind, if there were really different species of men. Some, as Metzan, say there are but two species of men, the white and the black; others, as Desmoulins, divide the human family into six- teen species; Bory de St. Vincent, has fifteen species; Joquinot thinks that there are three species, and the authors of the "Types of Man- kind," though they also contend that there are many species of human beings, admit what it would be useless to deny, viz: that all the classi- fications of authors are arbitrary. But if men really are of different species, it would certainly not be arbitrary to classify them as such. These classifications are arbitrary only because there are no specific ♦ 5 marks by which to make the necessary distinctions. Color will not do for a distinctive mark, because there are a thousand shades of color • and the advocates for distinct species would not like to have a thou- sand of them. If a shade of difference in color be taken as a mark of difference in species, then one sister will be of a different species from another. All of us have seen a blonde and a brunette in the same family. If a difference in the size of the head be specific, tnen two brothers may belong to different species. If the shape of the face be specific, we may find in one set of children three or four species. I have seen in one family, the oval face of the Caucasian, the high cheek bones of the Mongolian, and the median cheek bones of the American. I have seen in one family, the features of the Greek and the Egyptian. And yet young Philosophy would persuade us that these differences, when observed on a large scale are specific; that men, differing in color, and in the shape and size of the head, cannot have descended from one original pair that lived six thousand years ago; that all the varied circumstances of climate and mode of living, the ennobling power of civilization and the debasing tendencies of barbar- ism, cannot, in thousands of years, have produced the varieties which we see; when the fact is, that many of the differences or varieties are observed in the same family of brothers and sisters. From such facts I should argue thus : if even slight differences in color and size and form may exist in the individuals of the same immediate paternity, it may be supposed that great differences, in all these respects, will be effected by widely differing circumstances operating on the various de- scending lines of such a family in a few thousand years. It would do well enough to regard the Englishman and the negro as specifically different, were it not for the fact, that there is every intermediate shade. The Frenchman is a shade darker than the Englishman; is he of a dif- ferent species ? The Spaniard is darker still; is he of a different species 2 The Berber is darker than the Spaniard. How dark must we get be- fore we stick a pin, and say, Ah, here we must end one species and commence another! The Abyssinian is still darker than the Berber; and now we are on the borders of negro-land, and its sable denizens come next. But the negro has thick lips and prognathous jaws and woolly hair : so have many white persons. And then, again, many of the blackest tribes have neither the thick lips, the projecting jaws, nor the woolly hair ; for example, the Kafirs and the Yolofs, the Mandingos and many of the natives of Mozambique. The fact is, that the differ- ences in lips, jaws, hair and head of the various nations of mankind, shade off into each other just as their colors do, and afford no gaps to 6 separate them into species : and this is the reason why no two ethnolo- gists agree as to the number of species. We have cyanometers to measure the differences in the color of the sky ; perhaps we may yet have a melanometer, by the aid of which our modern philosophers may measure the shades of darkness so nicely as to determine the exact boundaries of the species, from the fairest Caucasian to the black- esj African. But if a shade of difference in color be specific, then one man may belong to two species. Let a northerner reside in Cuba a year or two, and expose himself freely to the sun and he will change his species. We have seen, that according to some of our modern classifications, the members of the same family are of different species ; but the ab- surdity of their principles goes even further and makes two or three species of one individual. The metaphysical scissors of Hudibras " Could sever and divide, A hair 'twixt north and north-wst side." but our modern savants can bisect all the intermediate degrees. How shall we account for all the shades of difference in mind and body that we observe, in the human family ? Certainly not by supposing that they are the hereditary traits of as many primeval pairs, for we have seen that children differ from their own parents; and we know that various circumstances are capable of producing many of the observed differences ; and we do not know that these circumstances are not ca- pable of producing all of them. We do not know that climate, the modes of living, civilization and barbarism, in short, all the influences, moral and physical, which have operated on men from the flood to the present day, may not have caused all the difference we now behold. Even if this be not a sufficient explanation, the doctrine of the unity of our race will not be affected, for it is easier to suppose that God has degraded men, and families, and races, in penalty for their crimes than to suppose the multitudinous creations involved in the doctrine of a plurality of species. We know that heat tends to darken the skin. This is one item of knowledge with which we are all familiar. But is it capable of chang- ing the color of the Caucasian into that of the negro? This is the ques- tion. I answer that it may do this in a long course of generations. Perhaps in a few hundred years. Life is short and such a change requires a long time, so that we cannot estimate it from actual observation. Like the growth of the oak it is so gradual that we cannot see the change during a short period of observation. From the cradle to the coffin of even the octogenarian but little change is observed in objects whose 7 mutations are tardy. They appear the same in the evening as in the morning of life. A small segment of a great circle appears as a straight line. Could we follow it far enough the curve would be evident. Facts go to prove that climate has changed the white to the black man. Apriori, we would suppose this possible from our knowledge of the ef- fects of heat, but facts are not wanting to show that the change has been really effected. I quote from Cardinal Wiseman a few of such facts. "All classes of men, Persians, Greeks, Tartars, Turks and Arabs, in a few generations, without any intermarriagewith the Hindoos, assume a deep olive tint little less dark than the Negro, which seems nataral to the climate." He is speaking of the climate of India. Again—"The Portuguese natives form unions among themselves alone; or if they can, with Europians, yet the Portuguese have during three hundred years residence in India become as black as Kafirs." Now facts of this kind abound in works on the natural history of man. The whole evening would not suffice for the briefest rec;tal of them. So that it is certain that a white man may become black. We learn from Pritchard, on competent_authority, that there is in India every shade of color in the same race—that there are white Pariahs and black Brahmins, and vice versa; so that the color does not depend on the caste. The American Indians which are admitted to be one race present also all tho varieties of color. For example the California Indians very much resem- ble the negroes in color and features. La Perouse compares them to the negroes of the West Indies, whilst in the extreme north, they are found with fair complexions. Captain Dixon says that the natives of Port Mul- grave are so covered with paint that it is difficult to determine what is their color. He adds :' we persuaded one woman to wash her face and hands and the alteration in her appearance surprised us. Her counte- nance had all the cheerful glow of an English milk-maid, and the healthy red which flushed her cheeks was 'even beautifully contrasted with the whiteness of her neck. Her forehead was so remarkably clear that the translucent veins were seen ramifying in their minutest branches." Mi. Rollins says that their hair is of a chesnut color. Speaking of the ab- origines of South America, Mr. D'Orbigny remarks, " The Peruvian differs more from the Patagonian, and a Patagonian from a Guarani than does a Greek from an Ethiopian or a Mongole. We could quote numerous authors to prove that the natives of high mountainous districts are whiter than those of the lowlands, in the same latitude. Differ- ences in the degree of heat fully explain the phenomena. It is a matter of fact then, that the white man may become black. It is a matter of fact, that of the same race, some are white and others are black. 8 The earjiest records of history place man in Asia in the valley of the Euphrates in the northern temperate zone. Take a map in your hand. Egypt is not far off; only a short distance to the southwest. Thither- ward a portion of the descendants of Noah, bent their march in the early morning of the post-diluviau world. They ascended the Nile to Nubia, Abyssinia, and to the ardent regions of tropical Africa; and still onward beyond the Tropic of Cancer, to the Cape of Tempests. The first tropical climate reached by man was that of Africa; and there where he has been burned and carbonized by the suns of four thousand years he is black- est. This seems to have been the land of Nod to the descendants of Ham. Starting southeastward from the plain of Shinar, other families and tribes reached Persia, Afghanistan, India, Burmah, Mallacca, and the equinoctial line in the Islands of Sumatra, and Borneo. Here again in the tropical region of southern India—in Malacca, in Sumatra, and the other Tropical Islands of the south sea, we find the skin of the natives deepening to the sable hue of Ethiopia. They are not yet so black, as a general rule, as in Africa, where man found a hotter and dryer cli- mate, and where he settled at an eariler day. Man is cosmopolitan and omnivorous—he can live every where and subsist on every variety of food. He may be darkened by a southern sun or whitened by north- ern frosts, but neither can arrest his march or oppose insuperable bar- riers to his sovereignty or dominion. He subsists on the dainty fruits of the glowing Islands of eternal summer, and reposes beneath the shades of umbrageous trees, listening to the songs of rainbow colored birds. He cultivates the fields of the temperate zones and with due forecaste pro- vides for the changing seasons. He inhabits ice built villages on the dreary coasts of Siberia, and harpoons the whale, amid the rigors and storms of the Arctic seas. His civilization may languish and his face may blacken, as he marches southward to the line. His civilization may pause in the presence of the eternal snows which bleach him to whiteness, yet he, universal mau, in virtue of the mental and physical powers bestowed on him by bis Maker, is lord and master of this lower world. From Burmah, following the shores of the sea of China north-west- ward; the shores of the blue sea, the yellow sea, the sea of Core;;, man finally reached America by the straits of Berhing, and *pi\ ad from the ice-bound regions of the north, across the entire hemisphere, to the snow invested islands of the land of lire. Here, too, we find him vary- ing iu color, and this variation influenced by climate. If the tropical Indian is not as black as the tropical African, may it not be because tho former has not been so long subjected to these climatic influences 9 as the latter. Let us return to the banks of the Euphrates. From this cradle of mankind issued families and clans, not only to Africa and Eastern Asia, but to northwestern Europe and northeastern Asia: and it is in these northern latitudes where man settled in the earliest ages that he is whitest. I do not mean to assert that men are black or white, just in the de- gree of their proximity to the equator or the poles ; but I feel disposed to say that such would be the case were all other things equal—as the degree of altitude, the dryness and moisture of the atmosphere, and in general everything that enters into the constitution of climate; the length of residence, the isolation and mixture of races,