" We have just been seeing political power concerned to break a "clandom" which preceded it in time. Let us now see how it behaves in regard to a clandom which is its contemporary. It may be said in effect, paraphrasing Shakespeare: "Monarchy and feudal aristocracy are two lions born on the same day."
There was something of an act of piracy about the foundation of the European states. The Franks who conquered Gaul, the Normans who conquered England and Sicily, and even the Crusaders who went to Palestine, all behaved like bands of adventurers, dividing the spoil. What was there to divide? First of all, the ready cash. Afterwards, there were the lands; no deserts, these, but furnished with men whose labor was to maintain the victor. To every man, then, his share in the prize. And there we have the man-at-arms turned baron. This is shown to the evolution of the world of the word baro, which in Germany meant "freeman" and in Gaul denoted the name of the class.

There the remains for seizure the apparatus of state, which there was one: naturally it is the share of the chief. But when a barbarian like Clovis found himself confronted with the administrative machine of the Late Empire, he did not understand it. All he saw in it was a system of suction pumps, bringing him a steady flow of riches on which he made merry with no thought for the public services for which these resources were intended. In the result, then, he divided up along among his foremost companions the treasure of the state, whether in the form of lands or fiscal revenues.

In this way, civilized government was gradually brought to ruin, and Gaul of the ninth and 10th centuries, was reduced to the same condition as that in which William of Normandy was to find England of the 11th.

There was imposed the system of barbarian government known as government by retainers. Let the Charlemagne use as points d'appui of Power, the influential men who are already on the spot, or let William create his own influential men by a share-out of big fiefs in England - it was all one. The important thing to note is that the central authority appoints as its representatives in a given district either the chief proprietors of the soil who were there already, or those whom it sets up in their place.

By a slant common to the barbarian mind, or rather by an inclination which is natural to all men, but in barbarians encounters no opposing principle, these influential men soon confound their function with their property and exercise the former as though it were the latter. Each little local tyrant then becomes legislature, judge and administrator of a more or less extensive principality; and on the tribute paid by it he lives, along with his servants and his men-at-arms.

Power thus expelled soon returns, however, under the spur of its requirements. The resources at his disposal are absurdly out of proportion to the area, which depends on it and to the population, which calls it the sovereign. The reason is that the manpower has been taken over by the barons. What was in other days a tax is now a feudal due. The only way is to rob the baronial cell of its withheld resources. That is why monarchy establishes townships on the confines of the baronial lands; they act as cupping-glasses, drawing away the best elements in the population. In that way, the barons will get fewer villeins, and the king more bourgeoisie who will be grateful for the franchises conferred on them and will help the king in his necessities from their purses. "

― Bertrand De Jouvenel , On Power: The Natural History of Its Growth