Still, the 13 states were hardly “united.” They were loosely held together by a weak central government that had been set up in a document called the Articles of Confederation.
In May 1787, Hamilton and other delegates from the states traveled to Philadelphia to discuss creating a new plan. After four months of debate, the U.S. Constitution was finished. It set up a strong national government.
But the states still had to ratify, or officially approve, the Constitution. Across the states, there was a lot of disagreement over whether it was the best plan to guide the new country.
Hamilton helped write dozens of essays explaining and defending the Constitution. Later called the Federalist Papers, the essays helped persuade people to support the Constitution. It became the “supreme law of the land” in 1788.