H. W. C. Davis

Between the years 1100 and 1500 A.D. the state-system of Europe passed through changes amounting in their sum-total to a revolution. But the changes which endured, whether they affected political boundaries or constitutions, came about by slow instalments. At no stage of the development was there any general cataclysm such as had followed the dissolution of the Frankish Empire, and was to follow the advent of Napoleon.