Although militarist literature on this, as on most similar points, shows flagrant contradictions, even that literature is against the view that war is the outcome of the sheer sudden temper of nations. Most of the popular, and all of the scientific, militarist writers take the contrary view. Mr. Blatchford and his school normally represent a typical militarist policy, like that of Germany, as actuated by a cold, deep, Machiavellian, unsentimental, calculated opportunism, as diverse from a wild, irrational explosion of feeling as possible. Mr. Blatchford writes:
German policy, based upon the teachings of Clausewitz, may be expressed in two questions, the questions laid down by Clausewitz: "Is it expedient to do this? Have we the power to do it?" If it will benefit the Fatherland to break up the British Empire, then it is expedient to break up the British Empire. Clausewitz taught Germany that "war is a part of policy." He taught that policy is a system of bargaining or negotiating, backed by arms. Clausewitz does not discuss the moral aspect of war; he deals with power and expediency. His pupils take his lead. They do not read poems on the blessings of peace; they do not spend ink on philanthropic theories.
All the more scientific writers, without an exception, so far as I am aware, repudiate its "accidental" character. They one and all, from Grotius to Von der Goltz, take the view that it results from definite and determinable laws, like all the great processes of human development.
Von der Goltz ("On the Conduct of War") says:
One must never lose sight of the fact that war is the consequence and continuation of policy. One will act on the defensive strategically or rest on the defensive according as the policy has been offensive or defensive. An offensive and defensive policy is in its turn indicated by the line of conduct dictated historically. We see this very clearly in antiquity by the example furnished us in the Persians and Romans. In their wars we see the strategical rôle following the bend of the historical rôle. The people which in its historical development has arrived at the stage of inertia, or even retrogression, will not carry on a policy of offence, but merely one of defence; a nation in that situation will wait to be attacked, and its strategy will consequently be defensive, and from a defensive strategy will follow necessarily a defensive tactic.