What are at least Two primary source documents that led to the Constitution?

Two primary source documents that significantly influenced the U.S. Constitution are the Articles of Confederation and the Federalist Papers. The Articles of Confederation, adopted in 1781, highlighted the weaknesses of a loose confederation of states, prompting the need for a stronger federal government. The Federalist Papers, written by Alexander Hamilton, James Madison, and John Jay, were a series of essays advocating for the ratification of the Constitution, outlining its principles and addressing concerns about a centralized authority.