Our ancestors didnt worry about heart disease, cancer or diabetes. They didnt fear Alzheimers or Parkinsons disease. These diseases were so incredibly rare before the 1900s, that they didnt need scientists to solve any mystery. There was no mystery! Our ancestors simply ate food real food, and were nourished. Sure, there was illness and life was not perfect. But chronic degenerative diseases rates were incredibly low. The leading cause of death before 1900 was one of four things: infancy death, death from childbirth, death from infections, & death from accidents. Today, the leading causes of death are heart disease & cancer. Clearly, theres something we need to change.