Norman baron could claim any of them as a prescriptive right. Feudalism existed in Normandy as the organization of the state, and as the system which regulated the relations between the duke and the knights and the nobles of the land, but it did not exist at the expense of the sovereign rights of the duke. This was the system which was introduced fully formed into England with the grants of land which the Conqueror made to his barons. It was the only system known to him by which to regulate their relations to himself and their duties to the state. To suppose a gradual introduction of feudalism into England, except in a geographical sense, as the confiscation spread over the land, is to misunderstand both feudalism itself and its history. This system gave to the baron opportunities which might be dangerous under a ruler who could not make himself obeyed, but there was nothing in it inconsistent with the practical absolutism exercised by the first of the Norman kings and by the more part of his immediate successors. Feudalism brought in with itself two ideas which exercised decisive influence on later English history. I do not mean to assert that these ideas were consciously held, or that they could have been formulated in words, though of the first at least this was very nearly true, but that they unconsciously controlled the facts of the time and their future development. One was the idea that all holders of land in the kingdom, except the king, were, strictly speaking, tenants rather than owners, which profoundly influenced the history of English law; the other was the idea that important public duties were really private obligations, created by a business contract, which as profoundly influenced the growth of the constitution. Taken together, the introduction of the feudal system was as momentous a change as any which followed the Norman Conquest, as decisive in its influence upon the future as the enrichment of race or of language; more decisive in one respect, since without the consequences in government and constitution, which were destined to follow from the feudalization of the English state, neither race nor language could have done the work in the world which they have already accomplished and are yet destined to perform in still larger measure.