Who opposed ratifying the constitution ND what was their major argument against ratification's?

Opponents of ratifying the Constitution were known as the Anti-Federalists, which included figures like Patrick Henry and George Mason. Their major argument against ratification centered on the fear that the new federal government would be too powerful, undermining states' rights and individual liberties. They also criticized the lack of a Bill of Rights, believing it was essential to protect citizens' freedoms from potential government overreach.