Benjamin Franklin remarked at the end that it was not the document that he would have written, but that it was probably the best constitution that could be produced. Even then, it was not completely acceptable and would not have been ratified except for the addition of the first ten amendments, which have been known ever since as the Bill of Rights.
The Constitutional Convention met in Philadelphia in 1787 to produce a successor to the inadequate Articles of Confederation. The Articles of Confederation were drawn up during the American Revolution to define the national government, but were too weak to achieve their goals and were replaced by the US Constitution. Benjamin Franklin was America's most famous scientist, a successful businessman, and its chief diplomat during the Revolution. The first ten amendments to the U.S. Constitution guarantee certain freedoms for Americans and are collectively terms the Bill of Rights.