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Review title: Very plausible synthesis
Product review: Klein tells the six million-year-old story of human evolution from a "splitter's" perspective. Accordingly, H. habilis is distinguished from rudolphensis, and the Asian H. erectus from the African ergaster and the European antecessor. Neandertals are accorded some humanity, but are treated as a separate species. They evidently lacked the inferred genetic mutation for modern speech that supposedly arose some 50 kya. While Klein avoids any mention of the earlier evidence for speech, and argues away inconvenient dates, he offers a coherent synthesis of all the recent data.
