After the Fall of Rome, Feudalism came. Feudalism was a new political structure that caused power to decrease. Also europeans fought for domination.
Manorialism was an economic system structured around the feudal manor of the lord estate. It was a way to organize chaos even though not everyone had social mobility. Everyone had to play their role in socity
The Popes were basically the rulers and claimed papal supremecy. They had laws in place and carved out authority for themselves.