Key figures in drafting the U.S. Constitution and the Federalist Papers included James Madison, Alexander Hamilton, and John Jay. Madison is often referred to as the "Father of the Constitution" for his pivotal role in its creation and promotion. Hamilton and Jay collaborated with Madison in writing the Federalist Papers, a series of essays advocating for the ratification of the Constitution. These writings provided crucial insights into the intentions behind the document and have since become foundational texts in American political theory, articulating concepts such as checks and balances and the separation of powers.