The primary author of the Federalist Papers was Alexander Hamilton, who wrote 51 of the 85 essays promoting the ratification of the U.S. Constitution.

Published between 1787 and 1788, these essays aimed to address concerns about a strong federal government and to explain the principles of the new Constitution. Hamilton collaborated with James Madison and John Jay, who contributed 29 and 5 essays, respectively. The Federalist Papers offered insights into the framers’ intentions and provided a compelling argument for a balanced government structure, influencing American political thought and serving as a vital resource for constitutional interpretation.