Which of the following was NOT one of the authors of The Federalist Papers?

The Federalist Papers were a series of 85 articles and essays written to promote the ratification of the United States Constitution. They were authored primarily by three individuals: James Madison, Alexander Hamilton, and John Jay. These writers used the pseudonym "Publius" when publishing their works. Their collective aim was to address the concerns and counter the criticisms that arose during the debate over the new Constitution.

Thomas Jefferson, while an important figure in American history—serving as the principal author of the Declaration of Independence, among other roles—did not contribute to The Federalist Papers. At the time of their writing, Jefferson was serving as the United States Ambassador to France and was not directly involved in the discussions surrounding the Constitution and its ratification. Thus, identifying him as the author not associated with The Federalist Papers is accurate.