The war was fought throughout and ultimately won, not only by the usual military weapons in the narrower sense, but by the whole economic, industrial, and financial systems of the belligerent Powers. Food, shipping, metals and raw materials, credit, transport, industries and factories of all kinds played just as important a part as guns, rifles, aeroplanes, tanks, explosives and gas, warships and submarines.

The groans of the dying and the blanched set faces of the dead ... were enough to drive away all unwholesome feelings of exultation, and to remind one of the grim reality that war is. And even though these were the faces and the sufferings of our enemy, one had ... a deeper sense of the common humanity which knows no racial distinctions.