The psychological devastation of war is even more terrible than the material. War brings the savage substratum of human character to the surface, after it has swept away the strong habits that generations of civilized effort have built up. We saw how the breath of war in Ireland demoralized all parties alike. We have met the present more ghastly reality with admirable calmness; but we must be on our guard. Time wears out nerves, and War inevitably brings with it the suggestion of certain obsolete points of view, which in our real, normal life, have long been buried and forgotten. [Sidenote: It has roused the instinct of revenge.] It rouses the instinct of revenge. “If Germany has hurt us, we will hurt her more—to teach her not to do it again.” The wish is the savage’s automatic reaction, the reason his perfunctory justification of it: but the civilized man knows that the impulse is hopelessly unreasonable. The “hurt” is being at war, and the evil we wish to ban is the possibility of being at war again, because war prevents us working out our own lives as we choose. If we beat Germany and then humiliate her, she will never rest till she has “redeemed her honor,” by humiliating us more cruelly in turn. Instead of being free to return to our own pressing business, we shall have to be constantly on the watch against her. Two great nations will sit idle, weapon in hand, like two Afghans in their loopholed towers when the blood feud is between them; and we shall have sacrificed deliberately and to an ever-increasing extent (for the blood feud grows by geometrical progression), the very freedom for which we are now giving our lives. [Sidenote: And of plunder.] Another war instinct is plunder. War is often the savage’s profession: “‘With my sword, spear and shield I plow, I sow, I reap, I gather in the vintage.’ If we beat Germany our own mills and factories will have been at a standstill, our horses requisitioned and our crops unharvested, our merchant steamers stranded in dock if not sunk on the high seas, and our ‘blood and treasure’ lavished on the war: but in the end Germany’s wealth will be in our grasp, her colonies, her markets, and such floating riches as we can distrain upon by means of an indemnity. If we have had to beat our plowshares into swords, we can at least draw some profit from the new tool, and recoup ourselves partially for the inconvenience. It is no longer a question of irrational, impulsive revenge, perhaps not even of sweetening our sorrow by a little gain. To draw on the life-blood of German wealth may be the only way to replenish the veins of our exhausted Industry and Commerce.” So the plunder instinct might be clothed in civilized garb: “War,” we might express it, “is an investment that must bring in its return.”