As a pioneer work on the diplomacy of the war and post-war periods this book is distinctly welcome. The writer surveys the developments of the years 1914-1918, concentrating attention upon the major questions, such as those of intervention, and then outlines the major problems of the post-war period. On the whole the book is well-done, and shows a thorough acquaintance with the source material, though occasionally important books have been overlooked. Perhaps the chief weakness of the account is its brevity. Many extremely complicated problems are over-simplified, and the author himself is not always critical in the use of his material.