Europe throughout her history had never been so rich, so far advanced on the road to progress, above all so united and living in her unity; as regards production and exchanges she was really a living unity. The vital lymph was not limited to this or that country, but flowed with an even current through the veins and arteries of the various nations through the great organizations of capital and labour, promoting a continuous and increasing solidarity among all the parties concerned. In fact, the idea of solidarity had greatly progressed: economic, moral and spiritual solidarity. Moreover, the idea of peace, although threatened by military oligarchies and by industrial corners, was firmly based on the sentiments of the great majority. The strain of barbaric blood which still ferments in many populations of Central Europe constituted--it is true--a standing menace; but no one dreamt that the threat was about to be followed, lightning like, by facts, and that we were on the eve of a catastrophe. Europe had forgotten what hunger meant. Never had Europe had at her disposal such abundant economic resources or a greater increase in wealth. Wealth is not our final object in life. But a minimum of means is an indispensable condition of life and happiness. Excessive wealth may lead both to moral elevation and to depression and ruin. Europe had not only increased her wealth but developed the solidarity of her interests. Europe is a small continent, about as large as Canada or the United States of America. But her economic ties and interests had been steadily on the increase. Now the development of her wealth meant for Europe the development of her moral ideas and of her social life and aspirations. We admire a country not so much for its wealth as for the works of civilization which that wealth enables it to accomplish. Although peace be the aspiration of all peoples, even as physical health is the aspiration of all living beings, there are wars which cannot be avoided, as there are diseases which help us to overcome an organic crisis to which we might otherwise succumb. War and peace cannot be regarded as absolutely bad or absolutely good and desirable; war is often waged in order to secure peace. In certain cases war is not only a necessary condition of life but may be an indispensable condition towards progress. We must consider and analyse the sentiments and psychological causes which bring about a war. A war waged to redeem its independence by a nation downtrodden by another nation is perfectly legitimate, even from the point of view of abstract morality. A war which has for its object the conquest of political or religious liberty cannot be condemned even by the most confirmed pacificist.