Masters, give unto your servants that which is just and equal; knowing that ye also have a Master in heaven. Colossians 4:1
During the Hundred Years War there was the Wat Tyler Peasants Revolt of 1381 [England] (triggered primarily by new taxes and a 
new law which limited what peasants could be paid - for example let's say a noble wanted to pay 4 pennies a day labor in his fields because of the labor shortage in the aftermath of the Black Plague, but the other nobility wanted to pay only 2 because of greed, by limiting it the peasants would be more available to the nobility who payed less -- if the other couldn't offer higher wages to get their work and thereby saving the nobility money at the expense of the peasants. Also a law was passed forcing peasants to landscape and work at the local church 2 days a week for free....).
Apparently the Nobility, while giving lip service to God, forgot Colossians 4:1.
During the Hundred Years War there was also the Jacquerie 
Peasants Revolt of 1358 [France] (triggered primarily the French nobility actually assisting English mercenaries turned loose to raid the French peasants as well as landlords increasing rent of serfs after the Black Plague and on top of it all a law forcing peasants to rebuild the nobilities castles across northern France).
Apparently the Nobility, while giving lip service to God, forgot Colossians 4:1.
Sidenote---the Jacquerie Revolt was much bloodier than the 
English Revolt of Tyler. The one in France began with peasants killing a knight randomly in his house, then on to the next one where they raped the knights wife in front of him, killed her, then tortured him to death. Then unleashed on attacking castles and taking them apart.
Also Jacquerie was a name/slang used in public to the face of peasants by the nobility sneeringly which sort of meant in our street lingo to "white trash" or "hillbilly".