It is well for peace-lovers now and then to put the case thus strongly, in order that they may face the difficulty at its darkest. The fact that the evil they struggle against is persistent is but one argument more for their own persistence. Pacifists must be as ready and resourceful as the militarists. If ever it is right to learn from an enemy, it surely is in this instance. Something has been gained in this way. The late William James, for example, contended that we must admit that there are some good, human weapons in the hands of the war party, and that the peace men must study, not only how to appreciate them, but how to use them. Professor James would have sought in peaceful pursuits the equivalents of the appeal which war makes to certain manly qualities. Heroism in private life, in scientific pursuits, in exploration, in reform--this is what he urged. The patriotic impulse transmuted into great engineering works, vast plans for sanitation, campaigns against disease and misery--that is what peace can offer to ardent youth. All this is sound, and good as far as it goes; but the question arises to-day whether there is not need of something more positive and aggressive, whether the spirit of militarism cannot be turned against itself; whether, in a word, there should not be war against war. The conduct of a military campaign calls for an enormous amount of preparation and organization. Let the advocates of peace take this to heart. They cannot win simply by wishing to win. It is for them, too, to be far-sighted, to lay careful plans, to enlist every modern method of working in unison to a definite end. War mobilizes men. Peace must muster ideas, sentiments, influences. In the _Kriegspiel_ the strategist seeks to mass his troops upon the enemy’s weakest point. The tactics of peace should be similar. Argument and persuasion and appeal should be made to converge upon the exposed flank of the militarists. This may be found, at one moment, in the pressure of taxation, which needlessly swollen armaments would make unbearable. At another time, it may appear that the thing to hammer upon is the pressing need of social reforms, even attention to which will be endangered if all the available money and time are squandered upon preparing for a war that may never come. Let peace, too, acquire a General Staff, whose duty it shall be to survey the whole field, to work out fruitful campaigns, to tell us where to strike and how, to lay down the principles of the grand strategy to be followed.