1928. From the Preface: The period treated in this volume is one of unique interest and significance in the history of Europe. Within these two centuries the political and social conditions of the so-called Middle Ages came to an end, and the states system of Modern Europe took its rise. But the importance of the period is more than equaled by the almost superhuman difficulty of narrating its events in anything like orderly and intelligible sequence. Such unity as had been given to Western Europe by the mediaeval Empire and Papacy disappeared with the Great Interregnum in the middle of the thirteenth century; and such unity as was afterwards supplied by the growth of formal international relations cannot be said to begin before the invasion of Naples by Charles VIII of France at the end of the fifteenth century. In the interval between these two dates there is apparent chaos, and only the closest attention can detect the germs of future order in the midst of the struggle of dying and nascent forces. It is easy to find evidence of astounding intellectual activity and instances of brilliant political and military achievement, but the dominant characteristic of the age is its diversity, and it is hard to find any principle of coordination.