In the preface of this volume the author remarks that the stormy course of events in Russia since the war has distracted attention from the history of Russia during the war itself, and that this subject has been practically neglected. Anyone who has been concerned with recent European history will support this statement without question, and will welcome a reliable study of the evolution of Russia during the great conflict. The editor of the Carnegie Economic and Social History of the War is therefore to be warmly congratulated on his decision to include this volume in the series, though it is of a somewhat different type from the rest of the volumes. Mr. Florinsky has incorporated much of what is contained in the other volumes of the Russian series, and has added materially in several directions. He rightly stresses the political developments which were so closely bound up with the great social problems of the country. Without entering upon a discussion of even the main themes of the volume, we can say with confidence that this compact survey will be of great interest to numerous students of the Russian problem.