On War

by Carl von Clausewitz

If we only require from the enemy a small sacrifice, then we content ourselves with aiming at a small equivalent by the war, and we expect to attain that by moderate efforts. The enemy reasons in very much the same way. Now, if one or the other finds that he has erred in his reckoning that in place of being slightly superior to the enemy, as he supposed, he is, if anything, rather weaker, still, at that moment, money and all other means, as well as sufficient moral impulse for greater exertions are very often deficient: in such a case he just does what is called “the best he can;” hopes better things in the future, although he has not the slightest foundation for such hope, and the war, in the mean time drags itself feebly along, like a body worn out with sickness.

Thus it comes to pass that the reciprocal action, the rivalry, the violence and impetuosity of war lose themselves in the stagnation of weak motives, and that both parties move with a certain kind of security in very circumscribed spheres.

If this influence of the political object is once permitted, as it then must be, there is no longer any limit, and we must be pleased to come down to such warfare as consists in a mere threatening of the enemy and in negotiating.

That the theory of war, if it is to be and to continue a philosophical study, finds itself here in a difficulty is clear. All that is essentially inherent in the conception of war seems to fly from it, and it is in danger of being left without any point of support. But the natural outlet soon shows itself. According as a modifying principle gains influence over the act of war, or rather, the weaker the motives to action become, the more the action will glide into a passive resistance, the less eventful it will become, and the less it will require guiding principles. All military art then changes itself into mere prudence, the principal object of which will be to prevent the trembling balance from suddenly turning to our disadvantage, and the half war from changing into a complete one.

B. War as an Instrument of Policy

Having made the requisite examination on both sides of that state of antagonism in which the nature of war stands with relation to other interests of men individually and of the bond of society, in order not to neglect any of the opposing elements, an antagonism which is founded in our own nature, and which, therefore, no philosophy can unravel, we shall now look for that unity into which, in practical life, these antagonistic elements combine themselves by partly neutralising each other. We should have brought forward this unity at the very commencement, if it had not been necessary to bring out this contradiction very plainly, and also to look at the different elements separately. Now, this unity is the conception that war is only a part of political intercourse, therefore by no means an independent thing in itself.

We know, certainly, that war is only called forth through the political intercourse of Governments and nations; but in general it is supposed that such intercourse is broken off by war, and that a totally different state of things ensues, subject to no laws but its own.

We maintain, on the contrary: that war is nothing but a continuation of political intercourse, with a mixture of other means. We say, mixed with other means, in order thereby to maintain at the same time that this political intercourse does not cease by the war itself, is not changed into something quite different, but that, in its essence, it continues to exist, whatever may be the form of the means which it uses, and that the chief lines on which the events of the war progress, and to which they are attached, are only the general features of policy which run all through the war until peace takes place. And how can we conceive it to be otherwise? Does the cessation of diplomatic notes stop the political relations between different nations and Governments? Is not war merely another kind of writing and language for political thoughts? It has certainly a grammar of its own, but its logic is not peculiar to itself.

Accordingly, war can never be separated from political intercourse, and if, in the consideration of the matter, this is done in any way, all the threads of the different relations are, to a certain extent, broken, and we have before us a senseless thing without an object.

This kind of idea would be indispensable even if war was perfect war, the perfectly unbridled element of hostility, for all the circumstances on which it rests, and which determine its leading features, viz., our own power, the enemy’s power, allies on both sides, the characteristics of the people and their Governments respectively, etc., as enumerated in the first chapter of the first book, are they not of a political nature, and are they not so intimately connected with the whole political intercourse that it is impossible to separate them? But this view is doubly indispensable if we reflect that real war is no such consistent effort tending to an extreme, as it should be according to the abstract idea, but a half and half thing, a contradiction in itself; that, as such, it cannot follow its own laws, but must be looked upon as a part of another whole, and this whole is policy.