There is yet another noteworthy condition common to the two states, which must tend to incline them towards a similar course of action in the future. Partners, each, in the great commonwealth of nations which share the blessings of European civilization, they alone, though in varying degrees, are so severed geographically from all existing rivals as to be exempt from the burden of great land armies; while at the same time they must depend upon the sea, in chief measure, for that intercourse with other members of the body upon which national well-being depends. How great an influence upon the history of Great Britain has been exerted by this geographical isolation is sufficiently understood. In her case the natural tendency has been increased abnormally by the limited territorial extent of the British Islands, which has forced the energies of their inhabitants to seek fields for action outside their own borders; but the figures quoted by Sir George Clarke sufficiently show that the same tendency, arising from the same cause, does exist and is operative in the United States, despite the diversion arising from the immense internal domain not yet fully occupied, and the great body of home consumers which has been secured by the protective system. The geographical condition, in short, is the same in kind, though differing in degree, and must impel in the same direction. To other states the land, with its privileges and its glories, is the chief source of national prosperity and distinction. To Great Britain and the United States, if they rightly estimate the part they may play in the great drama of human progress, is intrusted a maritime interest, in the broadest sense of the word, which demands, as one of the conditions of its exercise and its safety, the organized force adequate to control the general course of events at sea; to maintain, if necessity arise, not arbitrarily, but as those in whom interest and power alike justify the claim to do so, the laws that shall regulate maritime warfare. This is no mere speculation, resting upon a course of specious reasoning, but is based on the teaching of the past. By the exertion of such force, and by the maintenance of such laws, and by these means only, Great Britain, in the beginning of this century, when she was the solitary power of the seas, saved herself from destruction, and powerfully modified for the better the course of history.