This volume was originally published in 1931 and revised for the third edition in 1937. The critical events since that date necessitated a further revision, with a large amount of re-writing and the addition of new chapters which brought the book to the opening of the Second World War with a short summary of events between that date and the autumn of 1943. The author consulted newly accessible archives and primary sources and covers topics such as the European Monarchy, the European Revolutions, Diplomacy and War, and Peace Treaties and Conferences not just within European borders but against the global backdrop of international interests.