Why was The Federalist written?

Assuming you mean the Federalist Papers, they were a series of anonymous articles written by proponents of ratifying the US Constitution. They were written in response to anonymously written articles favoring rejection of the Constitution. read more

The Federalist Papers were written in an attempt to get the New York citizens to ratify the United States Constitution in 1787. They were originally published using a pen name, "Publius," before being published in 1818 with the author's real names, which were James Madison, John Jay and Alexander Hamilton. read more

Anti-Federalist Opposed to a strong central government; saw undemocratic tendencies in the Constitution and insisted on the inclusion of the Bill of Rights. Included Thomas Jefferson, James Monroe, and Patrick Henry. read more

Simply put, the Federalist, a series of newspaper essays, 1778, written by James Madison, Alexander Hamilton and John Jay, were designed to explain the benefits of accepting the constitution of 1789 to the reading public. read more