I was thinking exactly the same thing about the serfs and vassals bit.
AFAIC 'capitalism' is, on the whole, nothing more than a form of industrial feudalism, and that while the superstructure of society has altered to take account of technology driven change and a gradual change in the balance of power relationships in society (e.g. - land ownership - used to be the principle currency of power, now a currency of control over those who have bought into it's old image (i.e got a mortgage and now own a piece of land), for one group of the new barons, the banks), but the essential underlying set of relationships, of dominant and dominated groups, hasn't changed since...well about 6,000 years when the pharonic model of government seems to have taken root as the principle method of managing large scale civilisatoins.