Feudalism: the dominant social system in medieval Europe, in which the nobility held lands from the Crown in exchange for military service, and vassals were in turn tenants of the nobles, while the peasants (villeins or serfs) were obliged to live on their lord's land and give him homage, labor, and a share of the produce, notionally in exchange for military protection.
Manor: any similar territorial unit in medieval Europe, as a feudal estate.
People on the Manor: King, Lord (nobleman), Bishops, Knight, Monks, Nuns, and Pesants
How the Groups are Interdependent
The social groups were interdependent becuase all classes depended another class for something that he they needed. For example, the serfs would work the fields for food, in return they would get land and protection as there payment.
How Feudalism Changed Politics
The Feudal System affected politics, it gave money and power to the nobles, it also gave safety for the serfs of invaders ever came. They were promised safety from invaders since they worked the land.