The four colonial regions: Chesapeake, New England, The Middle Colonies and Caroline Colonies had different social institutions as a consequence of different kind of people that settled there. Basically they had the same relationshp with England and they grow and prosper due the spirit of freedom of pilgrims and also of a new life linked with Puritanism and hard work inspired by it.
I believe the answer is: Because they show the truth of life
Reading books would force the people to confront the ugly side of humanities and the dark sides of life. For example, by reading history, people would be forced to realize that the good condition that society see today is build on the suffering, murder, and exploitation of another people.
I believe the answer is: norm violation
Norm violation refers to every actions that are not accepted by the majority members of a certain society. For most cases, norm violation usually do not resulted in direct legal implication for the actors, but would almost certainly resulted in negative perception that's given by other members of the social group.