River Out of Eden: A Darwinian View of Life
Date: 14 April 2011, 00:17
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Nearly a century and a half after Charles Darwin formulated it, the theory of evolution is still the subject of considerable debate. Oxford scientist Richard Dawkins is among Darwin's chief defenders, and an able one indeed-- witty, literate, capable of turning a beautiful phrase. In River Out of Eden he introduces general readers to some fairly abstract problems in evolutionary biology, gently guiding us through the tangles of mitochondrial DNA and the survival-of-the- fittest ethos. (Superheroes need not apply: Dawkins writes, "The genes that survive . . . will be the ones that are good at surviving in the average environment of the species.") Dawkins argues for the essential unity of humanity, noting that "we are much closer cousins of one another than we normally realize, and we have many fewer ancestors than simple calculations suggest." From Publishers Weekly Dawkins (The Selfish Gene) pictures evolution as a vast river of DNA-coded information flowing over millennia and splitting into three billion branches, of which 30 million branches?today's extant species?survive. Emphasizing that the genetic code is uncannily computer-like, comprising long strings of digital information, the eminent Oxford evolutionary biologist surmises that we are "survival machines" programmed to propagate the database we carry. From his perspective, nature is not cruel?only indifferent?and the goal of a presumed Divine Engineer is maximizing DNA survival. Dawkins cautiously endorses the controversial "African Eve" theory, according to which the most recent common ancestor of all modern humans probably lived in Africa fewer than 250,000 years ago. The author's narrative masterfully deals with controversies in evolutionary biology. Natural Science Book Club dual main selection; Library of Science alternate.
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