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136 who cannot see that circumstances have changed since those works were composed are called “practical” men and are said to be free from illusions. Those, on the other hand, who have some understanding of the modern world, and some capacity for freeing their minds from the influence of phrases, are called dreamy idealists, Utopians, traitors, and friends of every country but their own. If the facts were understood, wars amongst civilized nations would cease, owing to their inherent absurdity. Men's passions always lag behind their political organizations, and facts which leave no outlet for passions are not readily admitted. In order that hatred, pride, and violence may find an outlet, men unconsciously blind themselves to the plainest facts of politics and economics, and modern war continues to be waged with the phrases and theories invented by simpler men in a simpler age.

The second type of war which may sometimes be justified is what may be called “the war of principle.” To this kind belong the wars of Protestant and Catholic, and the English and American civil wars. In such cases, each side, or at least one side, is honestly convinced that the progress of mankind depends upon the adoption of certain beliefs—beliefs which, through blindness or natural depravity, mankind will not regard as reasonable, except when presented at the point of the bayonet. Such wars may be justified: for example, a nation practising religious toleration may be justified in resisting a persecuting nation holding a different creed. On this ground we might justify the resistance of the Dutch to the England and French combined in the time of Charles II. But wars of principle are much less often justified than is believed by those in whose age they occur. It is very rarely that a principle of genuine value to mankind can only be propagated by military force: as a rule, it is the bad part of men's principles, not the good part, which makes it necessary to fight for their defence. And for this reason the bad part