If we take war too realistically, with reference to its practical motives, its mere killing and looting, which we may suspect are related to the nutritional motive that we always find running through human conduct, and leave out of account those aspects of war which seem to belong mainly to the reproductive motive, to the enthusiasm and intoxication and art of the world, we shall to that extent misunderstand it. These motives cannot, of course, be separated definitely from one another in analyzing conduct, but we cannot be very wrong in differentiating phases of war which belong predominantly to the reproductive motive. It is because, at least, all deep tendencies of life are involved in war that it is so hard to eliminate it from experience. If war were an instinctive reaction it might be controlled by reason. If it were an atavism or a rudimentary organ some social surgery or other might relieve us of it. But war is a product of man's idealism, misdirected and impracticable idealism though it may be, but still something very expressive of what man is. It is this idealism of nations, leading them to the larger life, that makes them cling to war, whether for good or for evil. It will avail little to prove to the world that war is an evil, so long as war is desired, or so long as something which war so readily yields is desired. Statistics of eugenics and proofs that war ruins business will not yet cure us of our habit of war, and not at all so long as there is a vacancy in life which only the dramatic experiences of war can fill. When war is abandoned, it will be given up probably not because economists and sociologists vote against k, and we see that peace is good, but by the consent of a world which, once for all, is willing to renounce something that is dear to it and held to be good, if for no other reason, because it symbolizes what life and reality are. The world appears to have two minds about war, or at least it does not hold consistently to any one attitude toward it. Beneath all judgments about the evils of war, there is the allurement of these aesthetic motives which must be reckoned with in any psychology of war, or in any practical plan for eliminating war from the future experience of the race.