The Massachusetts Ratifying Convention was a meeting held in 1788 to discuss and ultimately decide whether Massachusetts would ratify the United States Constitution. This convention played a crucial role in the national debate between Federalists, who supported the new Constitution, and Anti-Federalists, who opposed it due to concerns about central authority and individual rights. The outcome of this convention was significant as it reflected the contentious political climate of the time and influenced other states in their decisions regarding ratification.