Education in the ideal of peace, which we may hope to be the state of the world in the future, will be an adjustment of the mind to new and practical modes of life rather than the establishing of a principle. The educated attitude of mind which will best safeguard the peace of the world must include an intelligent knowledge of all the agencies proposed to aid in establishing this state of harmony toward which we look forward. We must all know about arbitration, leagues of nations, courts of honor, understand diplomacy better and the arguments for disarmament, understand the economic and the industrial situation, the possibilities of cooeperation, reduction of the rights and privileges of classes, democratic movements. The inculcation of such knowledge is an education for peace. There is little that is abstruse in any of these ideas, and the very young child is not too young to know something of these wider aspects of the social life. All these may be presented in a concrete form as a part of the work of conveying a knowledge of current history. We may think of various cures for war, and various efforts that might be made educationally to prevent war. Peace might effectually be cultivated by an educational propaganda. But after all it is not such cures of war as this that we are most concerned about in the work of education. We might even tend to establish in this way a peace which would be detrimental to the higher interests of civilization. _A true educational philosophy, at any rate, is not to be dislodged from its purpose of keeping education constructive rather than inhibitory._ This institution of education must not be too much influenced by the temporary moods of the day, by the present gloomy evidences of the devastation of war. We must teach and prepare for an abundant life in which there is glory and wide opportunity, and in which the motives of power may be satisfied. Then peace can take care of itself. But this abundant life must be a life of _activity_, not of mere patriotism and subjective glorification and nationalistic interest. Vanity, the low order of enthusiasms, the glory of display, can no longer have a place in this national life.