THREE and a half centuries of immigration have injected ever-fresh doses of energy and tension into the American bloodstream. As diverse peoples learned to live together, they became a dynamo generating both creativity and conflict. One of the most diverse elements in American life was introduced when Africans were forcibly brought to the American colonies. The American experiment had begun and consisted mainly of white men with a European heritage. The African was of a different color, had a different language, a different religion, and had an entirely different world view. But perhaps the most striking contrast was that, while the European came voluntarily in search of greater individual opportunity, the African came in chains. Because the European was the master and thereby the superior in the relationship, he assumed that his heritage was also superior. However, he was mistaken, because the African had a rich heritage of importance both to himself and to mankind. When people interact intimately over a long period of time, the influences are reciprocal. This is true even when their relationship is that of master and slave. To trace the importance of the African heritage one must go back millions of years. Evidence is accumulating to the effect that Africa is the cradle of mankind. Professor Louis Leakey argues that Africa was important in the development of mankind in three ways. First, some thirty or forty million years ago, the basic stock which eventually gave rise to both man and the ape came into existence in the vicinity of the Nile Valley. Second, some twelve or fourteen million years ago, the main branch which was to lead to the development of man broke away from the branch leading to the ape. Third, about two million years ago, in the vicinity of East Africa, true man broke away from his now extinct manlike cousins. The present species of man-Homo Sapiens--developed through a complex process of natural selection from a large number of different manlike creatures-hominids. One of the most numerous of the early hominids was Australopithecus Africanus who originated in Africa. Although he also did some hunting, he lived mainly by collecting and eating vegetables. One of the things that identified him as a man was his utilization of primitive tools. He had a pointed stone which may have been used to sharpen sticks, and these sticks were probably used for digging roots to augment his food supply. Leakey believes that Homo Habilis, who lived in East Africa about two million years ago, was the immediate ancestor of man and the most advanced of all the hominids. Although the hominids spread far outside of Africa, it is clear that they originate there and that it was in Africa that true man first emerged. As Darwin predicted a century ago, Africa has been found to be the father of mankind.