4.—The National Armament,
or general call to arms, may be considered as a particular means of defence.
5.—Allies.
Finally, we may further reckon allies as the last support of the defensive. Naturally we do not mean ordinary allies, which the assailant may likewise have; we speak of those essentially interested in maintaining the integrity of the country. If for instance we look at the various states composing Europe at the present time, we find (without speaking of a systematically regulated balance of power and interests, as that does not exist, and therefore is often with justice disputed, still, unquestionably) that the great and small states and interests of nations are interwoven with each other in a most diversified and changeable manner, each of these points of intersection forms a binding knot, for in it the direction of the one gives equilibrium to the direction of the other; by all these knots therefore, evidently a more or less compact connection of the whole will be formed, and this general connection must be partially overturned by every change. In this manner the whole relations of all states to each other serve rather to preserve the stability of the whole than to produce changes, that is to say, this tendency to stability exists in general.
This we conceive to be the true notion of a balance of power, and in this sense it will always of itself come into existence, wherever there are extensive connections between civilised states.
How far this tendency of the general interests to the maintenance of the existing state of things is efficient is another question; at all events we can conceive some changes in the relations of single states to each other, which promote this efficiency of the whole, and others which obstruct it.