Middle Ages ~ Dark or Light?

I think that the middle ages were dark. In the middle ages, people were split into ranks. The highest were the kings and the pope. Then the bishops , then the knights. Then the poor peasants. I think that peasants were treated badly, they had to work a lot. Some of the peasants had to work on their lord's land and their own land. The girls were expected to obey their fathers, brothers and other male members of the family. Their father arranges who their daughter will marry. Girls were taught how to be a good mother and a good wife, but nothing else. Then, in those times, it was really dirty, so there was the black death. A lot of people died during those times.

source : http://static.howstuffworks.com/gif/black-death-1.jpg