| Baltimore: Johns Hopkins University Press | wadjakensis Dubois, 1921 A reconstruction of Australopithecus afarensis, a human ancestor that had developed bipedalism, but which lacked the large brain of modern humans |
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| 21 Lessons for the 21st Century Hardcover• Guns, Germs, and Steel: The Fates of Human Societies Paperback• Collapse: How Societies Choose to Fail or Succeed Paperback | Herron, Evolutionary Analysis 4th ed |