While primitive man cracked skulls to let out the evil spirits, modern man has cracked the genetic code and is trying to steer his own destiny. The roots and traditions of medicine go back to thousands of years. Early man attributed disease and other calamities, for which an obvious explanation was not readily apparent, to anger of gods and the evil spirits of various kinds. As a logical sequel, the medicine he practiced consisted of sacrifices and rituals for appeasing gods, and use of charms and amulets for protection against the influence of evil spirits. The supernatural theory of disease, though has lost its grounds in the educated masses, is not yet extinct in our modern society.