High Quality Content by WIKIPEDIA articles! The Constitution of the Commonwealth of Massachusetts is the fundamental governing document of the Commonwealth of Massachusetts, one of the 50 individual state governments that make up the United States of America. It was drafted by John Adams, Samuel Adams, and James Bowdoin during the Massachusetts Constitutional Convention between September 1 and October 30, 1779. Following approval by town meetings, the Constitution was ratified on June 15, 1780, became effective on October 25, 1780, and remains the oldest functioning written constitution in continuous effect in the world. The Massachusetts Constitution was the model for the Constitution of the United States of America, drafted seven years later.