To kill a principle demands a principle equally strong and inclusive. No one nation can keep down war and subjugation; for it must be so strong to carry out that purpose that it becomes itself a conqueror. It would be as intolerable to Germany, for example, to be ruled by the United States as it would be to the United States if they were ruled by Germany. The only restraint that will satisfy all the nations will be exercised by some organ of power in which all have fair representation and in which no nation is able to do things which stimulate jealousy and give grounds for the belief that some are being exploited by others. This suggestion does not demand a well integrated federal government for all the functions of the state but merely the adoption of a system of coöperation with authority over the outbreak of international war and strong enough to make its will obeyed. It is federation for only one purpose and such a purpose as will never be brought into vital action as long as the federated will is maintained at such a point of strength and exercised with such a degree of fairness that individual states will not question that will. This principle of federated action for a specific purpose was adopted by the United States in 1789, and though hailed by the practical statesmen of Europe as an experiment, it has proved the happiest form of government that has yet been established over a vast territory in which are divergent economic and social interests. In it is much more integration than would exist in a federated system to prevent war, where the action of the central authority would be limited to one main object. If it could be formed and put into operation by the present generation, who know so well what it costs to beat back the spectre of world conquest it might pass through the preliminary critical stages of its existence successfully. At any rate, the world is full of the feeling that such things may be possible, and it would be unwise to dismiss the suggestion without giving it fair and full consideration. The discussion brings up what seems to be a law of human activities, that as the ages run and as men develop their minds they combine in larger and larger units for carrying on the particular thing they are interested in. And they make these combinations by force or through mutual agreement. We have before us the consideration of the most important form of this unifying process, the unification of nations, which has generally come through force, but sometimes has come through agreement.