Alexander Hamilton, James Madison, and John Jay used the pen name Publius for The Federalist Papers. The essays defended the proposed United States Constitution during the ratification debate of 1787 and 1788.
Hamilton wrote most of the essays, while Madison and Jay contributed important pieces. They published the articles in New York newspapers, where readers were debating whether the Constitution would create an effective government or concentrate too much power in the national authority.
The name Publius referred to Publius Valerius Publicola, a Roman statesman associated with the founding of the Roman Republic. The pseudonym gave the essays a unified public voice rather than presenting them as separate arguments by three individual politicians.
The Federalist Papers were originally collected in book form in 1788. Historians later identified the authorship of most essays, although a few attribution questions remained debated. The essays are now frequently cited when interpreting the Constitution’s structure and original arguments.