We saw the new version this weekend, and there were striking resemblances between the Kings of England and the current and past residents of 1600 Pennsylvania Ave.
That, and the fact that the French lost yet another battle made the movie somewhat watchable.
The serfs were required by English commonlaw to remain in the service of their Lord. They couldn't leave his land. Failure to maintain the loyalty of one's serfs could cause them to break the law and leave, looking for other work, which often meant robbery and chicanery. Thus they became villains, meaning literally, land-bound peasants who had left the estate (villa) of their liege Lord.