It would seem probable that, in the next fifty years or so, we shall see a still further increase in the power of governments, and a tendency for governments to be such as are desired by the men who control armaments and raw materials. The forms of democracy may survive in western countries, since those who possess military and economic power can control education and the press, and therefore can usually secure a subservient democracy. Rival economic groups will presumably remain associated with rival nations, and will foster nationalism in order to recruit their football teams. There is, however, a hopeful element in the problem. The planet is of finite size, but the most efficient size for an organization is continually increased by new scientific inventions. The world becomes more and more of an economic unity. Before very long the technical conditions will exist for organizing the whole world as one producing and consuming unit. If, when that time comes, two rival groups contend for mastery, the victor may be able to introduce that single world-wide organization that is needed to prevent the mutual extermination of civilized nations. The world which would result would be, at first, very different from the dreams of either liberals or socialists; but it might grow less different with the lapse of time. There would be at first economic and political tyranny of the victors, a dread of renewed upheavals, and therefore a drastic suppression of liberty. But if the first half-dozen revolts were successfully repressed, the vanquished would give up hope, and accept the subordinate place assigned to them by the victors in the great world-trust. As soon as the holders of power felt secure, they would grow less tyrannical and less energetic. The motive of rivalry being removed, they would not work so hard as they do now, and would soon cease to exact such hard work from their subordinates. Life at first might be unpleasant, but it would at least be possible, which would be enough to recommend the system after a long period of warfare. Given a stable world-organization, economic and political, even if, at first, it rested upon nothing but armed force, the evils which now threaten civilization would gradually diminish, and a more thorough democracy than that which now exists might become possible. I believe that, owing to men’s folly, a world-government will only be established by force, and will therefore be at first cruel and despotic. But I believe that it is necessary for the preservation of a scientific civilization, and that, if once realized, it will gradually give rise to the other conditions of a tolerable existence. IV. THE ANTHROPOLOGICAL SCIENCES