What is the US bill of rights an agreement between?

The U.S. Bill of Rights is an agreement between the federal government and the states, specifically designed to protect individual liberties and limit governmental power. Ratified in 1791, it comprises the first ten amendments to the Constitution, ensuring fundamental rights such as freedom of speech, religion, and the right to bear arms. It reflects the compromise reached during the Constitution's ratification process, addressing concerns that the original document did not sufficiently safeguard personal freedoms.