Supporters of the Constitution realized that winning ratification in New York would be a difficult task. Governor George Clinton, who led the opposition, attacked the Constitution in several published letters signed "Cato," charging that the framers had no authority to devise a new system of government, and that the Constitution threatened the rights of the citizens as well as the states.
Hamilton realized that an effective response was necessary. Believing that a well-reasoned defense of the Constitution would win over many voters, he decided to publish a series of papers explaining the principles of the Constitution and why it was an improvement over the current Confederation government. Hamilton wrote the first "Publius" letter and enlisted John Jay and, later, James Madison to assist in the undertaking. Madison composed about one-third of the essays, Jay five, and Hamilton the remainder (the authorship of several is un-certain). The essays describe how the Constitution would operate as well as how the new system of government would mesh with both the principles that had inspired the Revolution and the lessons learned from the experience of the Revolution itself.
Federalist/Anti-Federalist Papers