Ratified on December 15, 1791, the Ninth Amendment (Amendment IX) to the United States Constitution is a part of the United States Bill of Rights. James Madison wanted to make sure that the Bill of Rights was not seen as granting only those rights that it listed. It is one of the least referred to amendments by the Supreme Court. The Ninth Amendment, when mentioned, usually plays a secondary role in supporting a new right. One of the few that depends on the Ninth Amendment is the constitutional right to privacy. What the Ninth Amendment means, simply put, is that the people of the United States have other rights besides those listed in the Constitution.