"In her memoir of living among the Bushmen, The Old Way: A Story of the First People, my friend Liz lovingly invokes an image first coined by evolutionary biologist Richard Dawkins: "You are standing beside your mother, holding her hand. She is holding her mother's hand, who is holding her mother's hand. . . . " Eventually the line stretches three hundred miles long and goes back five million years, and the clasping hand of the ancestor looks like that of a chimpanzee."