So I am reading Into the Storm (as well as the other materials) and come across mention of "Bonded" individuals, who seem to be more valuable than unbonded. I think it represents highly skilled individuals who are guaranteed certain care and comforts in exchange for a bonded contract. I would imagine that this would pertain to any skilled non-mercenary individual. What is the canon on this?
In the social structure of the Imperium, does it mirror that of the High Middle Ages, where their is a class of Free men, i.e. "man at arms" types, who operate outside of the feudal system providing skilled labor? And if so, do they sign contracts? I am just curious what others think.