By lineal descent the governmental establishments and the powers with which they are vested, in all the Christian nations, are derived from the feudal establishments of the Middle Ages; which, in turn, are of a predatory origin and of an irresponsible character D]efensive preparation advanced by the statesmen... in apology for competitive armaments is a diplomatic subterfuge, -there are indications that such has commonly been the case; but even if it commonly is visibly disingenuous, the need of making such a plea to cover more sinister designs is itself an evidence that an avowedly predatory enterprise no longer meets with the requisite popular approval. O]nce a warlike enterprise has been entered upon so far as to commit the nation to hostilities, it will have the cordial support of popular sentiment even if it is patently an aggressive war.... the patriotic sentiment of the nation may confidently be counted on to back the enterprise irrespective of the merits of the quarrel. Patriotism may be defined as a sense of partisan solidarity in respect of prestige. A]mong civilised peoples only those nations can be counted on consistently to keep the peace who are so feeble or otherwise so placed as to be cut off from hope of national gain. The ideal of the nineteenth-century statesmen was to keep the peace by a balance of power; an unstable equilibrium of rivalries, in which it was recognised that eternal vigilance was the price of peace by equilibration. What are the terms on which peace at large may hopefully be installed and maintained? What, if anything, is there in the present situation that visibly makes for a realisation of these necessary terms within the calculable future? And what are the consequences presumably due to follow in the nearer future from the installation of such a peace at large? And the answer to these questions is here sought not in terms of what ought dutifully to be done toward the desired consummation, but rather in terms of those known factors of human behaviour that can be shown by analysis of experience to control the conduct of nations in conjunctures of this kind.