Shortly after the ratification of the U.S. Constitution, the Founding generation added the Bill of Rights—the Constitution’s first 10 amendments. These amendments guarantee many of our most cherished liberties, including the freedom of religion, the freedom of speech, the right to keep and bear arms, and the right to a jury trial. After the Constitutional Convention, the absence of a bill of rights emerged as a key part of the debates over ratification. Anti-Federalists — those who opposed the Constitution — pointed to the missing bill of rights as a fatal flaw in the new document. Several states ratified the Constitution with an understanding that amendments would be promptly added by the new government. This module will explore the origins of the Bill of Rights, explain its importance to the debate over the ratification of the U.S. Constitution, and walk through the specific rights enshrined in each of the first 10 amendments.