In today’s age of highly processed food, packaged and shaped to look like animals, filled with ingredients we have never heard of, it is tempting to return to a diet from a much simpler time. A new fad that is catching on, known as the Paleolithic or “paleo” diet, aims to return people to a more “natural” way of eating. Before agriculture, people would eat lean meats, fruits, and vegetables, and they would avoid grains and processed foods. Is this what is really best for human consumption? According to a new book, the so-called caveman diet was abandoned for a reason, and the belief that it is superior is pure hokum.