One day a student asked anthropologist Margaret Mead for the earliest sign of civilization in a given culture. He expected the answer to be a clay pot or perhaps a fish hook or grinding stone. Her answer was "a healed femur." Mead explained that no healed femurs are found where the law of the jungle, survival of the fittest, reigns. A healed femur shows that someone cared. Someone had to do that injured person's hunting and gathering until the leg healed. The evidence of compassion is the first sign of civilization.