But it may be urged, granted that disarmament may not be set afoot spontaneously and separately by the different nations, mutual disarmament can occur by arrangement between the Powers, which, after the menace of German aggression is removed, will be disposed to take this step in concert. Such disarmament, it is usually conceived, will not stand alone, but will form an important feature of a larger international policy, by which the Powers will agree among themselves to settle any differences that may arise by reference to courts of conciliation or of arbitration, and perhaps also to concert measures of common action in dealing with States and territories not within their jurisdiction. Such a concert of European Powers has hitherto appeared to many to yield an adequate basis for the peace of Europe, if it could be brought about. It has also seemed to most men the utmost limit of the actually attainable. The idea of the possibility of any closer relation between sovereign independent States has been dismissed as chimerical.

Difficulties of disarmament schemes. No standard for proportioning armaments justly.

Now in any discussion of the feasibility of such a concert of European or world Powers as will by mutual agreement secure disarmament and a settlement of differences by judicial methods, it must be recognized at the outset that this war may make the successful pursuance of such a policy more difficult than it would have been before. A Balance of Power, whatever may have been its other disadvantages, seemed in itself favorable to the possibilities of an agreement in which each nation, or group of nations, might be an equal gainer. But a decisive victory in war, which leaves the Allied nations with a strong preponderance of power, is less likely to yield a satisfactory basis of agreement for a mutual disarmament. Is it likely that they will readily consent to a reduction in their several military and naval forces equivalent to the reduction they will demand in the forces of the nations that have been their enemies? To put the difficulty in concrete terms: Would France consent to an early reduction of her army upon terms which would leave her fighting-strength as compared with that of Germany relatively the same as before the war? Would Great Britain consent to reduce her navy in the same proportion as the reduction she required of Germany? Even if the Allies believed that the proportionate reduction would be duly carried out by Germany, would they regard such an arrangement as affording the desired security? Obviously not. It may, of course, be urged that an agreed basis of reduction might be reached, according to which the relative strength of army and navy assigned to Germany would be smaller than before. But the more closely the proposition is examined the less feasible does it appear. What basis for the size of armies could reasonably, or even plausibly, be suggested which would not assign to Germany a larger preponderance over France in number of soldiers than she possesses at present? Size of population, or of frontiers, the two most reasonable considerations for apportioning defensive needs, would tell in favor of Germany against France. True it would tell even more strongly in favor of Russia, assigning her, in fact, a relatively larger military predominance in Europe than she has ever claimed. But would either France or Germany regard the new military situation as safe or desirable? Nor would there be any permanence in an arrangement based on such a mutable factor as population, according to which the German preponderance over France and of Russia over Germany would be continually increasing. If area of territory, as well as population and frontiers, were taken into consideration in fixing a basis, France would come off a little better in relation to Germany, but the size of Russia, even if her European lands were alone included, would give her an overwhelming advantage. If, as might not unreasonably be claimed, the extra-European possessions of Russia, Great Britain, and France must be reckoned in, either on a basis of territory or of population, Great Britain and Russia would possess a superiority of military strength which would give them, acting together, a complete control over the politics of Europe and Asia. Or, were the United States to come into the arrangement, the military strength of Anglo-Saxondom might too obviously surpass that of any likely combination of other Powers.

Again, what basis of naval strength would be satisfactory? Great Britain would not think of accepting the area, population, or frontier factors unless the Empire as well as the British Isles were counted in. On the other hand, her proposal, that volume of shipping and of foreign trade should count heavily in the basis, might give her for the time being an even greater preponderance over other navies than she has hitherto possessed.

If the comparison of the military and naval strength of nations were conducted, as in the past, by direct consideration of the numerical strength and the fighting value of the several items of an army and a navy, agreement upon a basis of reduction would be manifestly impossible. The discovery and acceptance of any standard unit of naval or military value applicable to changing conditions of modern warfare are found to be impracticable. For though every military budget implies the acceptance of some scale of values by which the worth of a battery of artillery is compared with that of a battalion of infantry, while every naval budget involves a calculation of the worth of a submarine or a seaplane as compared with an armored cruiser and a super-Dreadnought, no two budgets would be found to support the same scale of values. It is quite manifest that no agreement for reducing armaments could be attained by stipulations as to the number, size, or quality of the several forces and arms employed. This difficulty in itself, however, is not fatal to the proposal. For a far simpler and more satisfactory method of agreement might be found by disregarding the concrete armaments and accepting a financial basis of expenditure which would leave each nation complete liberty to apply the money prescribed to it as a maximum expenditure on armaments in whatever way it chose. Though each nation, considering its defense, would doubtless have to take into account the sort of preparations for possible attack its neighbors might be making, it would be entitled to spend as large a proportion of its authorized expenditure upon guns, torpedo-boats, aircraft, Dreadnoughts, as it chose.

Must get rid of motives which impel armament. Mere agreement to reduce armament will be futile.

The real difficulty, therefore, turns upon the agreement upon a basis of comparative expenditure. Now this difficulty appears insuperable, if reduction of armaments be regarded as the sole, or the chief, mainstay of a durable peace. For so long as the motives which have hitherto impelled nations to increase their armaments still retain the appearance of validity in any nation or group of nations, no agreed basis for reduction will be reached, or, were it reached, no reliable adherence to its terms could be expected. For the reduction of armaments involves the acceptance of and the adherence to a principle of reduction by all the Great Powers. If any single Great Power refused to come into the agreement, or, coming in, was suspected of evading the fulfilment of its pledge by concealing some of its expenditure on armaments, this method would have failed pro tanto, both as an economy and a security. For each of the would-be pacific nations would have to make adequate provision against the warlike outsider or suspect. Now, that a mere agreement for mutual disarmament would thus be baffled is almost certain. So long as a Power, by simply refusing to come in, could retain full liberty to pile up arms with a view to a future policy of menace or aggression, would there not be Governments which would find some more or less plausible excuses for declining the invitation to come in? Or could we feel complete assurance that a Power with an aggressive past, after entering into such an agreement, would faithfully fulfil it when so many facilities of evasion present themselves? Nay, there would be a positive incentive to an aggressive or revengeful Power either to stay outside, or, entering in, to violate secretly its obligations. For, by either course, it would be enabled to steal a march in military strength over its intended enemy, if the latter were a faithful adherent to such a treaty. The slightest reflection suffices to show that a mere agreement for disarmament or reduction of armament must be futile.

But, it will be contended, these difficulties may be overcome by extending the agreement so as to bind the signatory Powers to bring their united force to bear upon any member convicted of a wilful evasion or infraction of the agreement. That is to say, they must engage to secure the agreement by an ultimate sanction of physical force. The administration of such an agreement would, of course, involve the setting up of some standing Court or Committee of Inquiry, vested with full rights of inspection and judgment, and endowed with a power of armed executive.

But if a treaty of reduction of armaments could be secured by such a guarantee of collective force, it would still find itself confronted by the problem of the lawless outsider. So long as an aggressive outsider were at liberty to threaten or coerce a member of the League without involving the hostility of the other members, this danger would compel members of the League to maintain large armaments, though they were secure against internal hostility. A single Power, such as Germany, Russia, or Japan, standing out for its absolute right to determine its own expenditure and policy, would cancel nearly all the economy of the agreement. It would become self-evident that the Powers entering such an agreement must bind themselves to a common defense against such an outsider. They would be impelled to this course by a double motive. In no other way could each member gain that security which would win his consent to a basis of reduction that would lower his separate defensive power. Again, by pledging themselves to united action against an aggressive outside Power, they would diminish, perhaps destroy, the aggressive design or policy of such a Power. For such aggressive policy and the armed force which supports it are only plausible upon the assumption that they can be successfully applied to gain a selfish national end. If the united strength of the Treaty Powers remained so great as to render the pursuance of its aggressive designs impossible or too dangerous, the lawless Powers might learn the lesson of the law, and, abandoning its hopes of aggression, come into the League.

Reduction must be linked with reversal of motives.