Here is a kind of social experiment in fiction. Take the lowest, most abject starting point for a human life. Give the child no advantages, home or family; provide it with no regular food or care; subject it to the privations of a society with no welfare system; deprive it of any educational, emotional or spiritual training; and then, when it finally finds an occupation, make it the lowest, most socially disadvantaged and despised. And then see what kind of person it turns out to be. Oh, and set the whole thing in the Middle Ages, which, as everyone knows, was the most brutal, depraved, disease- and poverty-ridden era in Western history.