The Massachusetts delegation was deeply divided over ratifying the Constitution and was dominated by anti-federalists. The “Massachusetts compromise” to introduce amendments, led by John Hanckock and Samual Adams, convinced states such as New York, New Hampshire and Virginia to vote to ratify, and also led to Massachusett’s ratification in February 1788. Ironically, Massachusetts did not ratify the Bill of Rights until the 150th anniversary of the Constitution’s ratification, in 1939.