The last great continental war was from 1870 to 1871. Prussia, guided by Bismarck and Moltke, defeated France and robbed her of two flourishing and populous provinces. The Treaty of Frankfurt marked the triumph of Bismarck’s policy, which aimed at the incontestable hegemony of Prussia in Central Europe and the gradual Slavisation of the Balkan zones of Austria-Hungary. One recalls these features of Bismarck’s policy in trying to understand the different international crises which took place in Europe from ’70 up to the bewildering and extremely painful situation of to-day. From ’70 onwards there were only remoter wars among the peoples of Eastern Europe, such as those between Russia and Turkey, Serbia and Bulgaria, Greece and Turkey, or wars in the colonies. There was, in consequence, a widespread conviction that a European or world war was no longer possible. The most diverse reasons were put forward to maintain this argument. _Illusions and Sophisms._ It was suggested, for example, that the perfecting of the instruments for making war must destroy its possibility. Ridiculous! War has always been deadly. The perfecting of arms is relative to the progress—technical, mechanical and military—of the human race. In this respect the warlike machines of the ancient Romans are the equivalent of the mortars of 420 calibre. They are made with the object of killing, and they do kill. The perfecting of instruments of war is no hindrance to warlike instincts. It might have the opposite effect. Reliance was also placed on “human kindness” and other sentiments of humanity, of brotherhood and love, which ought, it was maintained, to bind all the different branches of the species “man” together regardless of barriers of land or sea. Another illusion! It is very true that these feelings of sympathy and brotherliness exist; our century has, in truth, seen the rapid multiplication of philanthropic works for the alleviation of the hardships both of men and of animals; but along with these impulses exist others, profounder, higher and more vital. We should not explain the universal phenomenon of war by attributing it to the caprices of monarchs, race-hatred or economic rivalry; we must take into account other feelings which each of us carries in his heart, and which made Proudhon exclaim, with that perennial truth which hides beneath the mask of paradox, that war was of “divine origin.”