though merely viewed as a rude trade of bloodshed, ripened into an intellectual art. Were it merely with a view to more effectual carnage, this art (however simple and gross at first) opened at length into wide scientific arts, into strategies, into tactics, into castrametation, into poliorcetics, and all the processes through which the first rude efforts of martial cunning finally connect themselves with the exquisite resources of science. War, being a game in which each side forces the other into the instant adoption of all improvements through the mere necessities of self-preservation, became continually more intellectual. It is interesting to observe the steps by which, were it only through impulses of self-conservation, and when searching with a view to more effectual destructiveness, war did and must refine itself from a horrid trade of butchery into a magnificent and enlightened science. Starting from no higher impulse or question than how to cut throats most rapidly, most safely, and on the largest scale, it has issued even at our own stage of advance into a science, magnificent, oftentimes ennobling, and cleansed from all horrors except those which (not being within man's power utterly to divorce from it) no longer stand out as reproaches to his humanity. Meantime a more circumstantial review of war, in relation to its motives and the causes assigned for its justification, would expose a series of changes greater perhaps than the reader is aware of. Such a review, which would too much lengthen a single paper, may or may not form the subject of a second. And I will content myself with saying, as a closing remark, that this review will detect a principle of steady advance in the purification and elevation of war--such as must offer hope to those who believe in the possibility of its absolute extermination, and must offer consolation to those who (like myself) deny it. THE LAST DAYS OF IMMANUEL KANT.