THE world today contains many different types and stages of human culture coexisting side by side—from the industrial civilization of London and New York to the primitive societies of Central Africa and the tribal communities of the Pacific islands. One of the greatest of modern problems lies in the interact ion of these different civilizations and cultures, particularly in the reactions set up by the incursion of Western ideas into the lives of primitive peoples. In the last of his series of talks Mr. Driberg will discusa this problem, with all its implications of good and evil on both sides.