This document summarizes the key events and documents in the early history of the United States Constitution. It discusses that the Articles of Confederation were the first attempt at a governing document but proved ineffective. This led to calls for a new Constitutional Convention and the drafting of the US Constitution, which established a federal republic with separated powers. The Constitution was then ratified after debate between the Federalists and Anti-Federalists, with the addition of the Bill of Rights to protect individual liberties.