"Who could have foretold that this being, who walked upright and no longer lived in trees, who lurked in caves, hiding in fear from the great beasts who shared his world—who could have guessed that he would one day have in his hands the power to change the very nature of the earth—the of life and death over so many of its creatures? Who could have foretold that the brain that was developing behind those heavy brow ridges would allow him to accomplish things no other creature had achieved-but would not at the same time endow him with wisdom so to control his activities that he would not bring destruction upon himself?"