War will not cease for perhaps a century or more. But it will finally cease when the truth has sunk in that war is a loss to every belligerent and to the whole world. Human rivalry and competition will take other forms. There are many ways of killing men, women and children, besides suffocating them with chlorine. If a tribe is to be exterminated, nobody will be killed, but all its members will be painlessly sterilized by X-rays or some such modern means, so that the next generation will know them no more. It will be more humane than the Biblical expedient of “dashing their children against a stone.” The mass of interconnections between human nations and individuals will be like a closely-woven fabric. Even now, the digging up of a city road reveals a tangled network of water pipes, electric mains, gas pipes, and drain pipes suggestive of the dissection of an animal body. It is but a faint foreshadowing of what is to come. The substratum of life will become more and more complete as conscious life becomes simpler. Nobody is conscious of the appalling complexity of his anatomical organization when using his body as a well-poised instrument of thought and intercourse. “The simple life” is not the old-fashioned country life of England or the primitive life of savage humanity. Real simplicity is constituted by the life in which most things are done by pressing a button, and a man can travel across a continent in such comfort that on arrival at his destination all memories of his journey are dimmed or lost, and he can hardly recall having travelled at all. We may, therefore, expect that, as facilities for intercourse become more detailed and widespread, the effect will be, not to increase the tax on our nerve force until it becomes unbearable, but to increase our area of selection. There will thus be more consistency in our actual interests and activities and more real harmony and leisure. The unification of the planet which is being accomplished before our eyes will have some astounding consequences. Mankind will assume a definite mastery of his home in the solar system. Attila could boast that when he plunged his spear into the ground, the whole earth trembled. The earth trembles even now to the electric signals of our powerful wireless stations. What will it be in a hundred or a thousand years? In a hundred years the unification of the human race will be complete. The earth and the fulness thereof will be under the full mastery of man. All animal, vegetable and bacterial life will be kept within strict bounds in the interests of humanity. The earth will be under one government, and one language will be written and understood, or even spoken, all over the globe. There will still be different races and perhaps allied nations, but travel and commerce will be free and unfettered, and calamities will be alleviated and dangers met by the united forces of all mankind.