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.
Manor a landed estate or territorial unit, originally of the nature of a feudal lordship, consisting of a lord's demesne and of lands within which he has the right to exercise certain privileges, exact certain fees, etc.
People who lived in manors
The kings were above every one,the noble men were above the knights and serfs. The Nobel men would ask the kings for land and if they received it they would become lords. It nice they became lords they would hire knights to protect them and bring serfs and slaves to work for them.
This system effected the economy because the lords and kings would get all the money and the serfs and slaves did not get any and they did all of the work.
It also effected politics because the king controls everything and there really is no politics.
This system also effected social structures because you were basically born into your. Class and could not get out of it. It could work favors and be bad too.