Bastard feudalism is a somewhat controversial term invented by modern historians to characterize the form feudalism took in the Late Middle Ages, primarily in England. Its distinctive feature is the rendering by middle-ranking figures of military, political, legal, or domestic service in return for money, office, or influence. The gentry began to think of themselves as the men of their lord rather than of the king; individually they are known as retainers, and collectively as the 'affinity' of the lord, among other terms.
The historian Charles Plummer coined the term "bastard feudalism" in 1885. Plummer blamed bastard feudalism for the disorder and instability of the Wars of the Roses in the fifteenth century. However, "bastard feudalism" as a concept is primarily associated with Plummer's contemporary William Stubbs (1825–1901). According to Stubbs, a shift in English history took place under Edward I (reigned 1272–1307) when the feudal levy was replaced with royal payment in return for military service by the great magnates who willingly served the king. Thus, instead of vassals rendering military service when required by the lord, they paid a portion of their income into the lord's treasury. In turn the lord would supplement the owed military service with hired retainers, a sort of private army in full-time service to the lord.
In the 1940s K. B. McFarlane presented a strong challenge to the ideas of Stubbs. McFarlane stripped the term "bastard feudalism" of any negative connotation. To him, bastard feudalism centred not the financial aspect (the sums involved were mostly negligible) but on the concept of service in exchange for good favour. In a society governed on a personal basis, service to a lord was the best way to obtain favour in the form of offices, grants, etc. Lords would retain administrators and lawyers, as well as recruiting local gentry into their affinities. By offering money instead of land, lords could afford to retain more followers.