One book of this kind is worth ten of general speculation and loose generalization. Professor Hayes for years has been a keen student of the phenomenon of nationalism and its development, and here tackles a present-day problem in a scientific manner. French patriotism and love of glory have long been proverbial, but no real effort has ever been made to analyze and explain them. Professor Hayes does not deny their existence and does not blink the fact that patriotism is a national characteristic which colors the whole French outlook in international affairs. What he does insist upon is the view that it is not part and parcel of the French mentality at birth, but that it is instilled by education and environment. The book takes up in succession the influence of the government, the schools, the army and navy, the churches, the press, the radio and cinema, etc., and passes to a consideration of the organization of patriotism in societies, its stimulation by symbols and ceremonies, and its cultivation in Alsace-Lorraine. Not the least interesting part of the book is the series of appendices, in which the reader will find an invaluable digest of textbooks and an extensive guide to teacher societies and the press. Due account is taken of the efforts being made to cultivate internationalism, but the advocate of peace is bound to lay down this volume with a feeling of discouragement.