which were just then coming to an end. His biographer John Aloysius Farrell said his background in Depression-era working-class Boston, and his interpretation of his Catholic faith, led O'Neill to view the role of government as intervening to cure social ailments. O'Neill was "an absolute, unrepentant, unreconstructed New Deal Democrat," Farrell wrote.

In 1949, he became the first Democratic Speaker of the Massachusetts House of Representatives