Why were the Federalist Papers important?

Why this is the answer

The two official answers describe two jobs the essays did at different times. In 1787 and 1788 the Federalist Papers supported passing the Constitution. Ever since, they have helped people understand it. The first job was urgent. Each state had to decide whether to ratify the Constitution written in Philadelphia, and New York was still deciding when the essays began appearing in its newspapers. Writing together as Publius, Alexander Hamilton, James Madison and John Jay published 85 essays between October 1787 and May 1788, laying out why the state should say yes, and papers in other states reprinted them during their own debates. The opening essay set the stakes high. Hamilton told his readers that their choice would help settle whether people can build good government "from reflection and choice" or must depend on "accident and force." The essays did not win the argument alone. Many more people came around once the Constitution's supporters agreed to add a list of rights, and the first ten amendments, the Bill of Rights, followed in 1791. The second job is the reason the papers are still read. Because the authors explained, essay by essay, how the new government was meant to work, readers today use them to understand the reasoning behind the Constitution. Federalist No. 51 puts that reasoning in a single sentence, "If men were angels, no government would be necessary," and goes on to say that a government run by people must first be able to control the governed and then be obliged to control itself. Either answer is fine at the interview. Use the official wording, "They supported passing the Constitution" or "They helped people understand the Constitution," with or without "U.S." in front of Constitution. The wrong options mix the papers up with other founding events. The essays did not declare independence and did not end the Revolutionary War. They did not create the Bill of Rights either, although the debate they belonged to is where the promise of a list of rights was made.