The aim and result of the Roman Empire was peace, a world-wide peace. It is true that this end was not very articulately defined by those who pursued it, but (perhaps just because of that) the means to it were more practically designed and more effectively executed. The civilized world was one and to be treated as one; it was still Rome under a single government and a single head. There arose then the idea of a supreme sovereignty one and indivisible, that was the absolutely indispensable condition of a world peace. But the necessity of organization was equally grasped, insisted upon, realized. The civilized world was covered with a network of institutions through which the will of the Emperor flowed and circulated throughout the Empire. Peace through system and order--that was the secret of the Roman success. But two other ideas must be added to complete the explanation. The one was the idea or ideal of Justice; no system and no order could work unless it was, and commended itself to its subjects as being, scrupulously and exactly just. The second idea was that in order to be this it must be a legal system, based upon a known body of legal rights and duties, determining and controlling the whole conduct of the subjects to the sovereign and to one another. The notion which the Romans, not so much by their thought or speech, but by their acts, added to the world's stock was that of a peace secured and maintained by the just operation throughout the civilized world of a system of law the same for all, issuing from and enforced by a single central power. The notion is at least grandiose, and so stated seems almost too high and difficult for human nature to realize. Yet for centuries it was applied, and applied with marvellous success. Nor in spite of its apparent failure in the end has the idea of it ceased to dominate men's minds. I do not speak here of the transitory imitation of it by the Carolingians or of the attempt at the restitution or copy of it in the spiritual sphere of the Church, or again of its phantom survival in the ghostly form of the Holy Roman Empire. But I would point to the way in which it still--in thought--controls us when without essential alteration of the idea we transfer its application to the nation and still look for the secret of _its_ peace and strength in an organization of all its activities under a law proceeding from and enforced by a sovereign will resident somewhere within its structure, a law demanding and receiving obedience from all loyal subjects. Nor is the hope extinct that the way to a wider or world-wide peace lies through the restoration of a similar system in its application to international relations. Though I am unable to share this hope (or indeed the desire that its realization should be endeavoured after), I find it impossible to judge that it has yet lost its hold on men's minds or is without elements of importance in view of our present problem and perplexity.