In the beginning of the Middle Ages, feudalism became more popular and was later made the political institution. Another civilization that used feudalism as their way of governing was Japan, as feudalism played an important role in the government. The feudal system brought unity, an example would be the relationships between the military leaders and the lower class. The military lords provided protection and in return the lower class had to provide in military service. This was considered a good way in keeping order during the Middle Ages.
Another political institution that caused the fragmentations in politics were the church and state relations. The church limited political power as the state was ot allowed to effect the religion, except for speaking for the popes and bishops. As a result, the church became more involved in politics, while christianity began to lose it's faith and followers. The Byzantine Empire is an example, Justinian brought religious and secular laws, making a gap between the government and the church.
By the end of the late middle ages, as a result of feudalism and church and state relations came political fragmentation. The society became less stable and started to decentalize. As a relut of the hundred years war King John was forced to sign the Magna Carta. The signing of the Magna Carta was considered a treaty which confirmed feaudalism against the moarchs. These political institutions were important because it began to reform the