"What brought the ape out of the trees, and so the man out of the ape, was a taste for blood. This is how the story went, when a few fossils found in Africa in the 1920s seemed to point to hunting as the first human activity among our simian forebears-the force behind our upright posture, skill with tools, domestic arrangements, and warlike ways. Why, on such slim evidence, did the theory take hold? In this engrossing book Matt Cartmill searches out...