The Federalist Papers was a collection of 85 newspaper articles written by Alexander Hamilton & James Madison (with minor input from Jon Jay) to promote the ratification of the United States. Over time, the collection of articles became known as the Federalist Papers. The articles were written and published between October 1787 and April 1788.
On June 21, 1788, the Constitution was ratified by the ninth state .... this officially made the Constitution the Law of the Land. Towards the end of July 1788, with eleven states having ratified the new Constitution, the process of organizing the new government began.