Common Sense by Thomas Paine was highly instrumental in convincing the colonists that they should separate from Great Britain, since it called into question the idea that such a vast and prosperous land should need the support of a small island nation (Britain).
Marbury vs. Madison is the case that established Judicial Review
They were all barriers for the colonial period
The first four books (Matthew, Mark, Luke, and) of the New Testament are commonly referred to as the gospels.