Around 60,000 years ago, a man—genetically identical to us—lived in Africa. Every person alive today is descended from him. How did this real-life Adam wind up as the father of us all? What happened to the descendants of other men who lived at the same time? And why, if modern humans share a single prehistoric ancestor, do we come in so many sizes, shapes, and races?
Examining the hidden secrets of human evolution in our genetic code, Spencer Wells reveals how developments in the revolutionary science of population genetics have made it possible to create a family tree for the whole of humanity. Replete with marvelous anecdotes and remarkable information, from the truth about the real Adam and Eve to the way differing racial types emerged, The Journey of Man is an enthralling, epic tour through the history and development of early humankind.
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Spencer Wells traces human evolution back to our very first ancestor in The Journey of Man. Along the way, he sums up the explosive effect of new techniques in genetics on the field of evolutionary biology and all available evidence from the fossil record. Wells's seemingly sexist title is purposeful: he argues that the Y chromosome gives us a unique opportunity to follow our migratory heritage back to a sort of Adam, just as earlier work in mitochondrial DNA allowed the identification of Eve, mother of all Homo sapiens. While his descriptions of the advances made by such luminary scientists as Richard Lewontin and Luigi Luca Cavalli-Sforza can be dry, Wells comes through with sparkling metaphors when it counts, as when he compares genetic drift to a bouillabaisse recipe handed down through a village's generations. Though finding our primal male is an exciting prospect, the real revolution Wells describes is racial. Or rather, nonracial, as he reiterates the scientific truth that our notions of what makes us different from each other are purely cultural, not based in biology. The case for an "out of Africa" scenario of human migration is solid in this book, though Wells makes it clear when he is hypothesizing anything controversial. Readers interested in a fairly technical, but not overwhelming, summary of the remarkable conclusions of 21st-century human evolutionary biology will find The Journey of Man a perfect primer. --Therese LittletonFrom the Back Cover:
"Written with much verve, easy to read, and up-to-date on many important developments."--Luigi Luca Cavalli-Sforza, Stanford University, author of The History and Geography of Human Genes and Genes, Peoples, and Languages.
"Spencer Wells, whose genetic work has contributed to our understanding of human prehistory, has provided the lay reader with an account of the spread and mixing of the human species from its origin in Africa that is both scientifically accurate and accessible to the nonscientist. In achieving that accessibility, he has not made the common error of confusing simple explanations with simplistic ones. Most important, Wells has the intellectual integrity, all too rare in popularizations of science, to distinguish what is really known from what is only speculation."--Richard Lewontin, Harvard University, author of It Ain't Necessarily So: The Dream of the Human Genome and Other Illusions.
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