The Roman Empire stamped on the minds of its subject peoples, and on the Teutonic barbarians who became its heirs, the notion of a state as an organisation held together, defended, governed and policed, by a central ruler; while the sovereign was supreme in the domain of force and maintenance of order, whatever lay outside that domain--art, learning, history and the like--were secondary matters which might be left to the people. The essential life of the nation came to be expressed in the will and power of its master. The Gaelic idea was a wholly different one. The law with them was the law of the people. They never lost their trust in it. Hence they never exalted a central authority, for their law needed no such sanction. While the code was one for the whole race, the administration on the other hand was divided into the widest possible range of self-governing communities, which were bound together in a willing federation. The forces of union were not material but spiritual, and the life of the people consisted not in its military cohesion but in its joint spiritual inheritance--in the union of those who shared the same tradition, the same glorious memory of heroes, the same unquestioned law, and the same pride of literature. Such an instinct of national life was neither rude nor contemptible, nor need we despise it because it was opposed to the theory of the middle ages in Europe. At the least the Irish tribal scheme of government contained as much promise of human virtue and happiness as the feudal scheme which became later the political creed of England, but which was never accepted in Ireland. Irish history can only be understood by realising this intense national life with its sure basis on the broad self-government of the people. Each tribe was supreme within its own borders; it elected its own chief, and could depose him if he acted against law. The land belonged to the whole community, which kept exact pedigrees of the families who had a right to share in the ground for tillage or in the mountain pasturage; and the chief had no power over the soil save as the elected trustee of the people. The privileges of the various chiefs, judges, captains, historians, poets, and so on, were handed down from generation to generation. In all these matters no external power could interfere. The tribe owed to the greater tribe above it nothing but certain fixed dues, such as aid in road-making, in war, in ransom of prisoners and the like.