Generally speaking, it would be a "democracy" that is most likely to give you the greatest amount of personal freedoms, since in this form of government the people have a say in which laws are created, which are meant to serve the general public.
People in the middle ages could belong to three classes - they could either have been peasants and or serfs, they could have been lords or soldiers, or they could have been members of the clergy or church in general. These were the three classes that existed in the middle ages.
Because rhode island did not trust the other states