The Peace Society are not of this opinion: they greatly doubt that a war may be right, and they rarely fail to take their doubts to the tribunal of Scripture. Their efforts are well meant, this piety may be genuine enough; but a text is rarely a proof of anything, and in any case serves one man in as good stead as another. We remember that “the devil can cite Scripture for his purpose.” This unscientific method of proof or persuasion has ever been widely popular. It is a serious examination of the question that we want, a more careful study of its actual history and of the possibilities of human nature; less vague, exaggerated language about what ought to be done, and a realisation of what has been actually achieved; above all, a clear perception of what may fairly be asked from the future. It used to be said—is perhaps asserted still by the war-lovers—that there was no path to civilisation which had not been beaten by the force of arms, no height to which the sword had not led the way. The inspiration of war was upon the great arts of civilisation: its hand was upon the greatest of the sciences. These obligations extended even to commerce. War not only created new branches of industry, it opened new markets and enlarged the old. These are great claims, according to which war might be called the moving principle of history. If we keep our eyes fixed upon the history of the past, they seem not only plausible: they are in a great sense true. Progress did tread at the heels of the great Alexander’s army: the advance of European culture stands in the closest connection with the Crusades. But was this happy compensation for a miserable state of affairs not due to the peculiarly unsocial conditions of early times and the absence of every facility for the interchange of ideas or material advantages? It is inconceivable that now-a-days[106] any aid to the development of thought in Europe should come from war. The old adage, in more than a literal sense, has but too often been proved true:—“Inter arma, Musae silent.” Peace is for us the real promoter of culture. [106] The day is past, when a nation could enjoy the exclusive advantages of its own inventions. Vattel naively recommends that we should keep the knowledge of certain kinds of trade, the building of war-ships and the like, to ourselves. Prudence, he says, prevents us from making an enemy stronger and the care of our own safety forbids it. (_Law of Nations_, II. Ch. I. § 16.)