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paleoanthropology, genetics and evolution

history of anthropology

  • Quote: H.G. Wells on lacunar reading

    Tue, 2012-11-20 20:21 -- John Hawks

    From the preface of Mankind in the Making, by H. G. Wells:

    It is a work that the writer admits he has undertaken primarily for his own mental comfort. He is remarkably not qualified to assume an authoritative tone in these matters, and he is acutely aware of the many defects in detailed knowledge, in temper, and in training these papers collectively display. He is aware that at such points, for example, as the reference to authorities in the chapter on the biological problem, and to books in the educational chapter, the lacunar quality of his reading and knowledge is only too evident; to fill in and complete his design—notably in the fourth paper—he has had quite frankly to jerry-build here and there. Nevertheless, he ventures to publish this book.

  • Quote: Bérubé and the Boas Bowl

    Mon, 2012-10-15 15:12 -- John Hawks

    Michael Bérubé writes in the Chronicle of Higher Education: "Why I Resigned the Paterno Chair", with a discussion of academics versus athletics. I'm linking because of this:

    The day thousands of alumni cheer "We are Penn State" in celebration of the fact that the anthropology department is No. 1 nationally (having defeated Duke in the prestigious Boas Bowl) will be the day we know we've changed the culture in Happy Valley.

    Somehow I don't see it happening, although a Boas Bowl would be entertaining.

  • Quote: Ashley-Montagu and his zingers

    Mon, 2012-10-08 22:04 -- John Hawks

    Ashley Montagu is a unique character from the history of anthropology. I ran across an essay of his yesterday, which I found entertaining for its many zingers. It's entitled, "A cursory examination of the relations between physical and social anthropology", and while it has a four-field (well, two-field) tenor, it's far from complementary of his contemporaries [1].

    As for the effects of social anthropology upon physical anthropology, I am not aware that there have ever been any; yet, as we shall see, not only have physical anthropologists a great deal to learn from the findings of social anthropologists, but we shall also see that unless they make certain of these findings part of their methodological procedures, much of their labor is likely to prove abortive. The same may be said of social anthropologists in relation to the findings of physical anthropology. Each division in its many branches has been so intent upon pegging out its claims that the peggers seem almost to have lost sight of one mother for the number of the pegs. In a science such as anthropology, which covers so wide and so complex a range of phenomena, this is not altogether surprising; but the pioneering stage is over and it is time that the peggers began to take some cognisance of the larger purposes of their activities.

    I already tweeted that first line (my emphasis). What a classic!

    On craniometrics:

    In the past physical anthropologists have been content merely to philander upon the outskirts of these subjects, their chief occupation, being the production of a sort of calculated confusion with calipers wrought upon unoffending crania. The measurement of long series of crania has now been proceeding for more than 100 years as the main pastime of numerous workers, but with the exception of the work done within relatively recent years, it would be difficult to conceive of any work more useless or more barren of results than this.

    The final paragraph of the essay expresses an early version of Ashley-Montagu's later concern with race and social justice:

    The world would be immensely the poorer for the dissolution of all cultural differences between peoples. There is one belief, however, which is an essential article of faith and practise of many peoples, expressed in the notion: “We are the best, all others are our inferiors; they must be kept in their proper place.” I deem it among the most important tasks of the anthropologist to make available the evidence which may eventually prove to all mankind whether any people has, or has ever had, any justification for such a belief other than an hypertrophied sense of its own importance and the wishful mythology they have devised to support them in this belief. Only when the combined labors of physical and social anthropologists have laid bare the true meaning and value of such beliefs will anthropology have justified its claim to be called the science of man.


    References

    1. Ashley-Montagu MF. A cursory examination of the relations between physical and social anthropology. American Journal of Physical Anthropology. 1940;26(1):41 - 61.
  • J. Barnard Davis and the variation within races

    Mon, 2012-07-02 17:58 -- John Hawks

    Once again, I'm looking through source material for a very different reason, but ran across an interesting piece of history. J. Barnard Davis was a British physician and anatomist who, as a private collector, amassed an immense collection of nearly 1800 skulls. His studies on the cranial capacity of these skulls, including comparisons of skulls of different races, were cited by Darwin in The Descent of Man (which is what brought me to Davis' work).

    He published this work on human variation in the critical period between the 1859 publication of Darwin's Origin of Species and the 1871 publication of Descent of Man. During this period, Darwin did not publish on the subject of human evolution, but was engaged in a great deal of reading and correspondence on the subject. In his stead, publications and lectures by Huxley, Wallace, and others began to apply Darwinian principles to human variation.

    I may write more about Davis, but I wanted to make a note of a passage in the introduction to the 1867 catalog of his collection, the Thesaurus Craniorum [1]. He addresses the importance of a large collection of skulls, which among other things allows an assessment of the breadth of variation within populations. One consequence of our additional sampling of human variation in the 20th century was the recognition that variation among human populations was clinal -- with characteristics forming a gradient across geographic space.

    The extent of a collection is of much moment; for, besides affording more reliable averages of measurements, a large one is far more sure to illustrate the types of each race fully, and to contain its aberrant forms. The statement made by Prof. Theodor Waitz, that only small collections of race-skulls exhibit different forms of skulls strikingly whilst rich collections fill up the apparent intervening gaps and show a continual transition from every one form to every other, is only very partially correct, and is an assertion much more characteristic of a Professor of Philosophy than a Professor of Anatomy, essentially a science of observation. Although large collections, philosophically considered, must of necessity, by containing skulls that have intermediate forms, tend to lessen distinctions, they, at the same time, serve to develope [sic] race-characters more fully, and to define the play of diversities round these race-characters with more precision.

    The citation to Waitz is to Anthropologie der Naturvölker, 1859.

    From a certain point of view, Davis was correct: An increase of sample size will increase the range of the sample, but not greatly increase the proportion of overlap between samples drawn from two populations with different means. Large samples might increase a statistical precision in the description of races. Yet, Waitz' point is also correct. Large samples destroy the typological description of races by showing that no character uniquely typifies any human race. The effect of large samples on the range is often the key evidence that populations share common biology.

    Statistics is fundamental to population biology -- so much so that population geneticists like R. A. Fisher and Sewall Wright invented many statistical concepts. Until they understand statistical concepts, people seem inevitably drawn toward essentialism. Essentialism in the history of biology led to typological concepts of species, race, characters, and developmental stages, all of which explained variation in terms of deviation from the ideal type. We now appreciate that populations transform according to statistical rules, not typological rules.

    With his immense collection of skulls, Davis showed the extensive variation within populations. He argued so forcefully for the importance of variation that he predicted that the original Neandertal skull would be soon matched within the cranial diversity of living populations. Davis maintained that the skull's elongated shape and browridges could be explained as a result of craniosynostosis, premature closure of the cranial sutures. He looked to human pathology for anatomical intermediates with the Neandertals, arguing that the variation attributable to craniosynostosis would be found to grade continuously right up to the extreme found in the Neandertal skull. In other words, he argued against typology when it came to pathology.

    He turned out to be wrong about Neandertal, it was an overreach of his assumptions about variation in development. At the same time, he believed that "race-characters" were stable and that they reflected a long history of separation of human races. He provides an interesting case of how a nineteenth-century anatomist could toss a typological salad.


    References

  • "Asymmetrical characters"

    Sun, 2012-06-24 12:39 -- John Hawks

    In case you worry that paleoanthropology never casts off bad ideas, take a look at the intro to a review paper by Ernest Hooton in 1925 [1]:

    Within the last few years the discoveries of new fossil forms of man and of the anthropoid apes have made it very obvious that the early range of the giant Primates was considerably more extensive than most anthropologists previously were willing to admit. A remarkable and indubitably ancient form of man has come to light in Northern Rhodesia. A precursor of the modern Australian man has been discovered at Talgai, Queensland, and Professor Dubois, the discoverer of Pithecanthropus erectus, has disclosed the fact that his Java finds included apparently Australoid human crania, the knowledge of which he imparts to his fellow-workers only after some two-score years of silence. A molar tooth from the Middle Pliocene deposits of Nebraska has been pronounced by distinguished authorities to be that of a new genus of anthropoid ape, and the face and endocranial casts of a young anthropoid ape, claimed by its discoverer to show humanoid characters, has just been recovered from the limestone at Taungs, Bechuanaland, South Africa. More than this, some of the most recalcitrant antagonists of the eolithic theory have recanted and admitted to the human origin of the Pliocene flints from the 16-foot level of the Foxhall gravel pit in England, thus acknowledging the existence of an implement-using Tertiary man.

    Crazy. Whenever you hear people tell you about the resistance faced by people like Dart and Leakey to their early discoveries, remember the sheer amount of nonsense that passed for paleoanthropology in those days. It must have been a constant effort for scholars to sift the wheat from the windstorm of chaff. Most claims were extraordinary, and many of them contradicted each other.

    Of course, many of my colleagues will be happy to rail at length against the nonsense that passes for science now. I note only one element of consistency -- it really hadn't been "two-score years of silence" for Dubois, but it had been more than 20. We seem to bump up against similar prolonged periods of secrecy fairly often.


    References

    1. Hooton EA. The asymmetrical character of human evolution. American Journal of Physical Anthropology. 1925;8(2):125 - 141.
  • Paleoanthropologist Phillip V. Tobias dies

    Fri, 2012-06-08 12:43 -- John Hawks

    I want to pass along the news that Phillip Tobias, one of the world's leading paleoanthropologists and anatomists, died earlier this week. The Gauteng Tourism Authority has run a very nice short summary of his work and importance, and I especially like the way it ends:

    Although Phillip Tobias never had a family, he said "I have taught over 10 000 students, and all of those are, in some small way, like my children. So it is not a genetic legacy that I leave, but rather a cultural one, orally transmitted through education, the value of which cannot be overemphasized. I like to believe that I have given something valuable to every one of them, and I can tell you quite honestly that almost every one of them has given something very valuable to me, and I remember them as my own family."

    My e-mail inbox is filled with short remembrances from many of Tobias' long-time colleagues. and I am sure that he will be well memorialized.

  • Quote: Geertz on the variable

    Tue, 2012-06-05 19:49 -- John Hawks

    From Clifford Geertz' 1965 essay, "The impact of the concept of culture on the concept of man" [1]:

    The notion that unless a cultural phenomenon is empirically universal it cannot reflect anything about the nature of man is about as logical as the notion that because sickle-cell anemia is, fortunately, not universal it cannot tell us anything about human genetic processes. It is not whether phenomena are empirically common that is critical in science - else why should Becquerel have been so interested in the peculiar behavior of uranium? - but whether they can be made to reveal the enduring natural processes that underlie them. Seeing heaven in a grain of sand is not a trick only poets can accomplish.


    References

    1. Geertz C. The Impact of the Concept of Culture on the Concept of Man. In: Platt JR New Views of Man. New Views of Man. Chicago: University of Chicago Press; 1965.
  • Quote: Malinowski's Metropolis

    Sun, 2012-05-20 20:07 -- John Hawks

    Bronislaw Malinowski, in his 1936 article, "Culture as a determinant of behavior" [1]:

    Since in my opinion anthropology should begin at home, let me give you an anthropological impression of modern culture and recount a personal experience in which I very poignantly became aware of the power of things over man.

    No experience in my exotic wanderings among the Trobrianders and the Chagga, among the Masai and the Pueblo, has ever matched the shock I received in my first contact with American civilization, on my first visit to New York, when I arrived there ten years ago on a fine spring evening and saw the city in its strangeness and exotic beauty. The enormous yet elegant monsters blinking at me through their thousand starry eyes, breathing white steam, giants which crowded in phantastic clusters over the smooth waters of the river, stood before me -- the living, dominating realities of this new culture. During my first few days in New York, I could not shake off the feeling that the strange "genius" of this most modern civilization had become incarnate in the skyscraper, the subway and the ferry boat. Large insects in the shape of automobiles crept along the gutter called street or avenue, subordinate but important. Finally, as a fairly insignificant and secondary by-product of the enormous mechanical reality there appeared the microscopic bacteria, called man, sneaking in and out of subway, skyscraper or automobile, performing some useful service to their masters, but otherwise rather insignificant. Modern civilization is a gigantic hypertrophy of material objects, and contemporary man will still have to fight his battle in order to reassert his dominance over the thing.


    References

    1. Malinowski B. Culture as a Determinant of Behavior. The Scientific Monthly. 1936;43(5):440-449.
  • Quote: Ruth Benedict on pugnacity

    Sun, 2012-04-29 16:39 -- John Hawks

    From the classic anthropology text Patterns of Culture by Ruth Benedict [1], a striking case of the "culture over nature" position:

    Warfare is not the expression of the instinct of pugnacity. Man's pugnacity is so small a hint in the human equipment that it may not be given any expression in inter-tribal relations. When it is institutionalized, the form it takes follows other grooves of thought than those implied in the original impulse. Pugnacity is no more than the touch to the ball of custom, a touch also that may be withheld.


    References

    1. Benedict R. Patterns of Culture. New York: Houghton-Mifflin; 1934.

Pages

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Neandertals

For years, I've worked on their bones. Now I'm working on their genes. Read more about the science studying these ancient people.

Denisova

From a finger bone of an ancient human came the record of a completely unexpected population. My lab is working on the science of the Denisova genome.

Acceleration

The advent of agriculture caused natural selection to speed up greatly in humans. We're uncovering some of the ways that populations have rapidly changed during the last 10,000 years.

Malapa

Just outside Johannesburg, the Malapa site is producing some of the most exciting finds in human evolution. This site is the headquarters of the Malapa Soft Tissue Project.