Federalist Papers
The Federalist Papers were a series of newspaper articles written about the United States Constitution. Many talked about how the Constitution would solve America's political problems. Most of them were published in newspapers in New York and Virginia, states were it was not clear whether or not the Constitution would pass (it did). Most were written by Alexander Hamilton or James Madison, though a few were written by John Jay. One of the most famous of the Papers is Federalist No. 10. It was written by Madison and says that the Constitution would keep the United States from being run by small groups called "factions".
The papers are often thought of as one of the most important works of American political thought. Sometimes they are used by Supreme Court justices to try to say what the founders were thinking.