Within the last two centuries economic forces have worked a mighty revolution. Continents have been converted into communities. The prosperity of our eastern industries controls the activities of the West, and a disturbance from any section throws a tremor over all. Tribal barter has developed into a world-wide commerce until the most distant nation may easily acquire the products of another. Steel rails weave a web of commercialism among the peoples, and the cable welds them in a mighty network which, responsive to every flash of news, brings all the nations into a mutuality of interests. So interdependent are the nations and so vital are their relations that a single fluctuation in the most distant market finds a response in our own. A slight disorder in Wall Street strains the whole financial world. And thus through intercourse in commerce, industry, the press, Christian missions, and scholastic research a system has been developed that holds no place for the selfish policy of exploiting backward peoples. We no longer consider the advance of alien peoples in wealth and prosperity as a menace to our own. There is being developed a strong international public opinion which realizes that anything that destroys the well-being of one member is the concern of all. In the light of these facts, future world-politics can have no place for the settlement of disputes by force. A declaration of war by one of the large powers to-day would be more terrible than it has ever been in the past. The man of business, of education, of philanthropy, of civic advancement cannot reasonably advocate a policy that would ruin business, stagnate education, increase poverty, and turn progress over to the ravages of manslaughter. Industry cannot continue when the shoulder that should turn the wheels of industry grows weary beneath the weight of the musket. Education cannot proceed when libraries and lecture halls are deserted for the camp and fortress. A Tolstoy with all his power of vivid presentation does not overdraw the picture. The moral fiber and physical strength of a people must forever afterward bear their scars. A struggling people can never rid themselves of the evil effects of the conflict, although they may rejoice in the valor of their heroes. Nations cannot afford to become the theaters of carnage and bloodshed and the rendezvous of commercial and moral pirates and civic grafters.