H. W. C. Davis

Neither the internal development of the medieval state nor the international politics of medieval Europe can be explained without constant reference to class distinctions. First, there is a sharp line dividing each state horizontally and marking off the privileged few from the unprivileged many, the rulers from the ruled. Below the line are the traders, artisans, and cultivators of the soil; above it the landlords, the officeholders, and the clergy.