Race and Human Evolution: A Fatal Attraction [Anglais] [Relié]

To begin with, there is a lot of trash out there posing as explanations of human evolution. Wolpoff and Caspari's book is NOT one of these. The authors take pains to explain what multiregional evolution is NOT, namely, the multiple origin of humanity. Like just about everyone else, they contend that humans originated in Africa. However, they build a persuasive case that (a) there is no such species as Homo erectus, and (b) that the earliest Homo sapiens left Africa some two million years ago. Whether or not one agrees with this scenario, it makes interesting and informative reading, and I believe is a must for anyone interested in the evolution of humanity, for it provides an alternative to the now-popular view that "modern" humans, whatever that may mean, originated late, in Africa and "replaced" everyone else.à

This book accurately portrays the skeletal evidence for human origins, in the context of the Multi-regional theory of human evolution. In this respect it's typical Wolpoff & his usual high standard of excellence, "nuff said. What REALLY needs commentary is the major misconception several reviewer have posted. DNA data has NOT "blown skeletal studies out of the water". We now know that mtDNA AND Y-chromosome lineages ARE HIGHLY subject to natural selection, which means that selective processes CAN (& WILL) cause "lineage replacement" in populations. The multi-regional theory REQUIRES geneflow between regional populations, and even miniscule levels of geneflow will introduce "new" lineages, that can replace the earlier lineages in that population. Selective advantages of as little as hundredths of a percent, and "once in a century" geneflow between adjacent populations, WILL result in total worldwide replacement of lineages within a 100,000-150,000 year period WITHOUT significantly affecting the rest of the genepool. So yes, lineage studies DO "show" that we all share common mtDNA & Y-chromosome ancestors within the last 50-250,000 years (depending on which mutation rate estimate is used), but this actually FITS the predictions of the multi-regional model (for that matter, some mutation rate estimates give calculations that ALLOW descent from regional Homo erectus populations). And.... autosomal DNA studies REVEAL ancient regional population structuring for most genes that goes back as much as a million years, but more recent structuring for other genes, which is ALSO exactly what you'd expect under multi-regionalism's "geneflow & spread of advantageous genes" expectation.... but NOT what would be expected of a human population that recently spread out of Africa. So look at ALL the data INCLUDING BOTH the skeletal (which this book is excellent on) AND the DNA side of things (sadly, I've seen no single comprehensive reference on this aspect) before making up your mind. I suggest you read this book AND search pubmed for scientific papers covering the full spectrum of DNA study interpretations.

The debate between multiregional evolution vs. the replacement model continues unabated, and naturally, not without certain biases muddling the understanding of the interested lay-reader. Wolpoff and Caspari do an excellent job of presenting the historical foundations for the intellectual biases AND the over-simplified misunderstandings of multiregional evolution perpetuated by the popular media which are responsible for the ongoing confusion regarding this debate. Human evolution is NOT a simple matter easily reduced to one or two easy-to-manage ideas. The replacement model is well addressed in the text and is shown to be easier to comprehend than the multiregional model, which explains the media's favoratism for the former. The technical information provided favoring both views is carefully presented and explained, and the reader is left with the task of making up his/her own mind. An approach of which I approve. Balancing this text with those of Dr. C. Stringer and Prof. Rushton (another review on this site) is recommended for even treatment. Were I teaching a course in paleoanthroplogy, I would certainly make Wolpoff & Caspari's book required reading.