The aim of this book, in the first edition, was to present facts and to avoid theoretical discussion. The emphasis however is placed on cultural differences, and therefore a considerable part of the book is devoted to the description of illustrative cultures, ranging from the Fuegians to Western Civilization. In the chapter on the Theory of Culture (XX) the author states that 'a complete theory of culture must explain why the same people have a different social heritage at different points of time; in other words, why cultures change' (p. 358). This is of course correct, but the author does not seem to be interested in the other question, why culture exists. The