Peers are people who are part of the same social group, so the term peer pressure means the influence that peers can have on each other.
The Constitutional convention took place in Philadelphia on May 14, 1787. Rhode Island, fearing that the Convention would work to its disadvantage, boycotted the Convention and, when the Constitution was put to the states, initially refused to ratify it.
In May of that year, delegates from 12 of the 13 states (Rhode Island sent no representatives) convened in Philadelphia to begin the work of redesigning government. The delegates to the Constitutional Convention quickly began work on drafting a new Constitution for the United States.