This is an important, scholarly study, based in large measure upon Russian materials. The author sets out to show how the Soviets, despite their feeling of separateness and their hostility to a bourgeois world, were nevertheless obliged to adjust themselves to the requirements of international intercourse. He discusses learnedly and in detail the Bolshevik conceptions of international law and the peculiarly Bolshevik interpretations. Due attention is paid to the significance of recognition by the United States and of Russia's entrance into the League. The book should have interest for all students of international affairs.