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Book Reviews 4 Human Ethology Bulletin, 24(4), 2009 during the last 10,000 years. BOOK REVIEWS It is unfortunate that many researchers who study human evolution believe that human evolution during the Holocene (i.e., the last 10,000 years, as in the book’s title) has not The Ten Thousand Year occurred. This book makes it clear that Explosion: evidence for phenotypically significant Holocene genetic evolution is rapidly How Civilization Accelerated accumulating. Many Darwinian Human Evolution anthropologists and molecular geneticists concur with Cochran and Harpending that human evolution did not end with the close of By Gregory Cochran & Henry Harpending the Pleistocene, but instead continued well into Basic Books, New York, NY, 2009, xii + 288 pp., the Holocene (e.g., Irons, 1998; Hrdy, 1999; ISBN 0465002218 [Hdbk, $17.82] Evans, Gilbert, Mekel‐Bobrov, Vallender, Anderson, Vaez‐Azizi, Tishkoff, Hudson, & Reviewed by: Aurelio José Figueredo and Lahn, 2005; Mekel‐Bobrov, Gilbert, Evans, Pedro Sofio Abril Wolf Vallender, Anderson, Hudson, Tishkoff, & Ethology and Evolutionary Psychology, Dept. of Lahn, 2005). The 10,000 years or more since the Psychology, University of Arizona, Tucson, AZ inception of agriculture have been more than 85721-0068 [E-mail: [email protected]; enough time for gene‐culture coevolution to [email protected]] produce physiological and behavioral genetic adaptations to the dramatically altered Overall, we found this book to be very easy and conditions of existence (Lumsden & Wilson, entertaining to read. Among its many merits 1981; Irons, 1998). are that it is short and sweet and to the point. We used an earlier, prepublication version of The authors make a strong empirical argument this book that was generously provided to us supporting the theory that evolution did not by the authors as the first reading in a recent stop with the onset of the Holocene and, in fact, graduate seminar that the first author of this may have sped up during this period. For this review taught on “Evolutionary Theories of reason alone, this book is an important Culture”. The second author of this review was contribution to the study of human evolution. one of the graduate students in that course, and For example, among the genetic changes during provides a student’s perspective. Based on the Neolithic period cited by Cochran and student feedback during class discussion, it was Harpending are the evolution of genes for clear that the majority of them enjoyed the book lactose tolerance and for resistance to malaria. and found it a valuable addition to the course. Convergent evidence from other sources for The text was used to prepare the students for such continuing gene‐culture coevolution the controversial concept of gene‐culture includes the finding that the geographic coevolution, which requires an acceptance (at patterns of variation in the first principal least in principle) of the possibility of component of gene frequencies for the six most significant human genetic change during important milk proteins in native European historic time. The traditional view has long cattle breeds correlated both with the locations been that pure cultural evolution, without any of European Neolithic cattle farming sites (‐.75) associated genetic selection, has been dominant and with the frequency of genes for lactose Human Ethology Bulletin, 24(4), 2009 5 tolerance (‐.59) in modern Europeans, the may have experienced enough low‐level distribution of cattle farming sites being interbreeding with Neanderthals so that a correlated (.73) with the lactase persistence biologically meaningful number of Neanderthal gene frequencies (Beja‐Pereira1 et al., 2003). genes found their way into the European gene Similarly, the spread of genes for sickle‐cell pool. The implication is made that this selective anemia was correlated with the spread of the introgression (the transfer of genes from malaria parasite, with its mosquito vectors, and another species) might account for some of the ultimately with the clearing of patches of unique features of contemporary Europeans as rainforest for the cultivation of yams in Africa opposed to non‐Europeans. We believe that (Durham, 1992; Coluzzi, 1999). there is no need to base so much of their otherwise solid argument upon a hypothesis Given the massive changes in both morphology that is likely to be controversial in the light of and behavior that have occurred in virtually all the many recent molecular genetic findings that of our domesticated plants and animals in establish a very large genetic distance between exactly the same time period (Palumbi, 2001), it modern humans and Neanderthals. As it is hard to believe that gene‐culture coevolution stands, the hypothesis that Cro‐Magnons did not produce any significant changes in interbred with Neanderthals appears (perhaps humans during the Holocene (Lumsden & unnecessarily) to be a major premise for the Wilson, 1981). Arguably, these domesticates arguments being made in the book, but the changed our “Adaptively Relevant empirical evidence presented in this chapter in Environments” (Irons, 1988) as much as we support is weak at best. However, we do not changed theirs. There is substantial molecular believe that agreement with the Neanderthal genetic evidence for massive population admixture theory is really necessary to the expansions and migrations during the remainder of the argument. Holocene over many large areas of the world, typically correlated with innovations in, and There are very plausible alternative hypotheses intensification of, food production (Cavalli‐ to interbreeding with Neanderthals for the Sforza, Menozzi, & Piazza, 1993, 1994). evolutionary changes in question, such as the relatively stable environment of the Holocene The book is written in a lively fashion with a enabling the invention of farming as a mode of considerable amount of solid historical, subsistence (e.g., Figueredo et al., 2007). This archaeological, and molecular genetic evidence novel form of subsistence resulted in higher presented in support of continuing human population densities, and both of these factors genetic evolution during the last 10,000 years. in combination provided novel and strong The numerous particulars provided are well‐ adaptive problems that resulted in an documented ones that help not only to acceleration of human genetic evolution. In persuade the reader that recent human genetic addition to being perhaps equally likely, this evolution must have happened, but also to alternative hypothesis may be more palatable convince the reader that it did in fact to many than the seemingly Eurocentric demonstrably occur. On the other hand, we do hypothesis of the incorporation of valuable have certain constructive criticisms of the book Neanderthal genes as a major driver of this that we hope that the authors might correct in evolutionary change. In our opinion, the any future edition. Neanderthal information was worth presenting but not to the extent it was emphasized in this For example, the major claim made in Chapter chapter. Fortunately, the very next chapter does 2 is that immigrant Cro‐Magnon populations indeed emphasize the importance of the 6 Human Ethology Bulletin, 24(4), 2009 agricultural revolution to recent human References evolution. Beja-Pereira1, A., Luikart, G., England, P. R., Bradley, Another problem with the current form of the D. G., Jann, O. C., Bertorelle, G., Chamberlain, A. book is an inconsistency of style. The book T., Nunes, T. P., Metodiev, S., Ferrand, N., & alternates between a very technical style and a Erhardt, G. (2003). Gene-culture coevolution between cattle milk protein genes and human very informal style in a way that may be a bit lactase genes. Nature Genetics, 35(4), 1-3. jarring to some readers. While we appreciate the evident effort on the part of the authors to Cavalli-Sforza, L L., Menozzi, P., & Piazza, A. write a book that will be both appealing and (1993). Demic expansions and human evolution. accessible to a broad readership, a sufficiently Science, 259, 639-646. and consistently authoritative tone might have Cavalli-Sforza, L. L., Menozzi, P., and Piazza, A. been preferable in our opinion. (1994). The History and Geography of Human Genes. Princeton, NJ: Princeton University Press. The empirical examples given in the book are helpful, but we believe that they should be Coluzzi, M. (1999). The clay feet of the malaria giant expanded upon in any future edition in order and its African roots: Hypotheses and inferences for a more general readership to be able to about origin, spread and control of Plasmodium understand them adequately. Given that this is falciparum. Parassitologia, 41, 277–283. a relatively new topic of research, providing Dawkins, R. (1976). The Selfish Gene, Oxford: Oxford more information on the limited number of University Press. documented test cases of recent human evolution is particularly important. Durham, W. H. (1992) Coevolution: Genes, Culture, and Human Diversity. Stanford, CA: Stanford Within the context of the graduate seminar in University Press. which we used this book, we found that Evans, P. D., Gilbert, S. L., Mekel-Bobrov, N., reading this at the outset did much to dispel the Vallender, E .J., Anderson, J. R., Vaez-Azizi, L common skepticism regarding the relative .M., Tishkoff, S. A., Hudson, R. R., & Lahn, B. T. speeds of genetic and memetic/cultural (2005). Microcephalin, a gene regulating brain size, evolution. The conventional wisdom is that continues to evolve adaptively in humans. Science, memetic evolution is so much faster that 309(5741), 1717-1720. cultural change leaves genetic change pretty much in the dust. This book does much to Figueredo, A.J., Brumbach, B.H., Jones, D.N., Sefcek, support the controversial position of Lumsden J.A., Vásquez, G., & Jacobs, W.J. (2007). Ecological constraints on mating tactics. In Geher, and Wilson (1981) that what is in fact occurring G., & Miller, G.F., (Eds.), Mating Intelligence: Sex, is a more symmetrical gene‐culture coevolution Relationships and the Mind's Reproductive System and not the one‐sided arms race proposed by (pp.
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