"The historical development of England is based upon the fact that her frontiers against Europe are drawn by Nature, and cannot be the subject of dispute; that she is a unit sufficiently small for coherent government to have been established and maintained even under very primitive conditions; that since 1066 she has never suffered serious invasion; that no big modern armies have succeeded her feudal levies; and that her senior service is the navy, with which foreign trade is closely connected. In short, a great deal of what is peculiar in English history is due to the obvious fact that Great Britain is an island."