On the whole, the miseries of the long centuries of Anglo-Saxon rule were mainly the outcome of the Crown’s weakness; while, at the Norman Conquest, England escaped from the mild sceptre of inefficiency, only to fall under the cruel sceptre of selfish strength. Yet the able kings of the new dynasty, powerful as they were, had to struggle in order to maintain their supremacy; for, although the conquered English races were incapable of concerted resistance against their Norman masters, the unruly alien barons fought vigorously to shake off the royal control. During a century of Norman rule, constant warfare was waged between two great principles—the monarchic standing on the whole for order, seeking to crush anarchy, and the oligarchic or baronial, standing on the whole for liberty, protesting against the tyranny of autocratic power. Sometimes one of these was in the ascendant; sometimes the other. The history of medieval England is the swing of the pendulum between these two extremes. The main plot, then, of early English history, centres round the attempt to found a strong monarchy, and yet to set limits to its strength. With this main plot subordinate plots are interwoven. Chief among these must be reckoned the necessity of defining the relations of the central to the local government, and the need of an acknowledged frontier between the domains of Church and State. On the other hand, all that interesting group of problems connected with the _ideal form_ of government, much discussed in the days of Aristotle as in our own, is notably absent, never having been forced by the logic of events upon the mind of medieval Europe. Monarchy was apparently assumed as the only possible scheme of government; while the relative merits of aristocracy and democracy, or of the much-vaunted constitution known as “mixed,” were not canvassed, since these forms of constitution were not within the sphere of practical politics. The student of history will do well to concentrate his attention at first on the main problem, while viewing the subsidiary ones in their relations to the central current. I. William I. to Henry II.—Main Problem: the Monarchy.