With each decade the technological gap widens between the industrial and the underdeveloped nations. Nevertheless in the new towns and factories of Africa, men from the traditional villages come face to face with the modern world; their whole pattern of life is challenged by their new experiences. They are men of two worlds. The author of this study of changing Africa recently spent fifteen years in Nigeria; he is the author of Yoruba Land Law and has edited the New Elites of Tropical Africa. Dr. Lloyd has deliberately limited his frame of referance to West Africa, where the interaction of traditional institutions with those imported from Europe has existed longer and gone farther.