What year was the Bill of Rights ratified?

The Bill of Rights, which comprises the first ten amendments to the United States Constitution, was ratified in 1791. This set of amendments was introduced to ensure the protection of individual liberties and limit governmental power, responding to the concerns raised by Anti-Federalists during the ratification debates of the Constitution itself. The proposal for these amendments came in 1789 when James Madison introduced them to Congress, but they were not formally ratified by the states until December 15, 1791. This historical context highlights the significance of the Bill of Rights in shaping American civil liberties and reflects the ongoing dialogue about the balance between federal authority and individual rights.