Who wrote the Federalist Papers?

The Federalist Papers were written by Alexander Hamilton, James Madison, and John Jay, all writing under the shared pseudonym Publius after a Roman who helped found the Roman Republic. The three authors brought complementary expertise. Hamilton was the project's organizer, a New York lawyer and former aide de camp to George Washington who had served at the Constitutional Convention. He wrote roughly 51 of the 85 essays, the largest share, dictating many of them in haste at his Wall Street law office in the evenings before they ran in the morning newspapers.

Hamilton handled subjects he knew best: the executive branch (Federalist Nos. 67 to 77), the judiciary (Nos. 78 to 83), taxation and finance (Nos. 30 to 36), the standing army and national defense (Nos. 23 to 29), and the dangers of confederation (Nos. 6 to 9 and 15 to 22). His Federalist No. 78 is the canonical defense of judicial review and Federalist No. 70 the classic argument for a single energetic executive.

James Madison was a Virginia delegate to Congress in New York during the project who had emerged from the Philadelphia Convention as the leading constitutional theorist. He contributed roughly 29 essays, including the most theoretically influential. Federalist No. 10 explains how an extended republic dilutes the dangers of faction, and Federalist No. 51 articulates the doctrine of separation of powers and checks and balances. Madison also addressed the Senate (Nos. 62 to 63), the structure of the national legislature (Nos. 52 to 58), and the comparison to ancient and modern confederacies.

John Jay, the New York diplomat and Secretary of Foreign Affairs under the Articles of Confederation, contributed five essays before falling ill from a head injury suffered during a riot in New York. He wrote Federalist Nos. 2 through 5 on the value of union for diplomacy and security, and Federalist No. 64 on the treaty making power.

The three authors agreed to write under a single pseudonym so the essays would appear as the work of one consistent voice. Authorship of individual essays was kept secret for many years. Hamilton's death in his July 11, 1804 duel with Aaron Burr left a list of essay attributions in his papers that did not match what Madison later claimed in his own annotated copy. The dispute over twelve essays was largely resolved by computational stylometric analysis published by Frederick Mosteller and David Wallace in their 1964 book Inference and Disputed Authorship: The Federalist, which assigned the contested essays to Madison.

The essays remain in print as The Federalist Papers and are cited by the Supreme Court more often than any other commentary on the Constitution.