This centralization was one of the great facts of the Conquest. In it resided the strength of the Norman monarchy, and it was of the utmost importance as well in its bearing on the future history of England. Delolme, one of the earliest of foreign writers on the English constitution, remarks that the explanation of English liberty is to be found in the absolute power of her early kings, and the most careful modern student can do no more than amplify this statement. That this centralization was the result of any deliberate policy on the part of William can hardly be maintained. A conscious modification of the feudal system as he introduced it into England, with a view to the preservation of his own power, has often been attributed to the Conqueror. But the political insight which would have enabled him to recognize the evil tendencies inherent in the only institutional system he had ever known, and to plan and apply remedies proper to counteract these tendencies but not inconsistent with the system itself, would indicate a higher quality of statesmanship than anything else in his career shows him to possess. More to the purpose is the fact that there is no evidence of any such modification, while the drift of evidence is against it. William was determined to be strong, not because of any theory which he had formed of the value of strength, or of the way to secure it, but because he was strong and had always been so since he recovered the full powers of a sovereign in the struggles which followed his minority. The concentration of all the functions of sovereignty in his own hands, and the reservation of the allegiance of all landholders to himself, which strengthened his position in England, had strengthened it first in Normandy.