Quick Notes on Middle Ages Social Mobility

She's just a simple, innocent, peasant girl!Caveat: There are lots of great articles and in depth analysis available on this topic.  These are just some quick notes to get you started if this is a theme of your writing.
While it may seem that social mobility in the Middle Ages was largely stagnant—with peasants being tied to the land and the noble class off-limits—this is largely misunderstood. Throughout all periods of the Middle Ages (Early, High and Late Middle Ages and into the Renais...