Five delegates from five states met in Annapolis, Maryland, to discuss trade. They later found out about Shays's Rebellion. 12 states sent delegates to a meeting in Philadelphia.
55 delegates attended the Constitutional Convention which was considered a very impressive group of people. Half were lawyers, others were planters, merchants, and doctors. 3/4 of them were were representatives in the Continental Congress. Not everyone attended this meeting in Philadelphia such as Thomas Jefferson and Patrick Henry. They created a good framework for the new government.
In 1776, many Americans thought that government was the main threat to peoples rights. The Convention wanted to create a government that could maintain order. On May 25th, 1787, at least two delegates from each of 7 states had arrived in Philadelphia. The convention was officially under way.
George Washington was elected president of the convention. They decided their rules for the convention. They wanted to be able to consider all ideas, be able to change sides in any debate, did not want to be pressured by the politics of the day, and for these reasons their meetings would remain secret.