The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. The state features two separate metropolitan areas - the eastern Boston metropolitan area and the western Springfield metropolitan area. Approximately two thirds of the state's population lives in Greater Boston, most of which is either urban or suburban. Western Massachusetts features one urban area - the Knowledge Corridor along the Connecticut River - and a mix of college towns and rural areas. Massachusetts is the most populous of the six New England states, the third most densely populated state in the United States, and also has the U.S.'s sixth highest GDP per capita. Culturally, historically, and commercially, Massachusetts has been significant throughout American history. The state has contributed many prominent politicians to national service, including members of the Adams family and of the Kennedy family. Originally dependent on fishing, agriculture, and trade with Europe, Massachusetts was transformed into a manufacturing center during the Industrial Revolution. During the 20th century, the state's economy shifted from manufacturing to services. In the 21st century, the state is a leader in higher education, health care technology, high technology, and financial services.