Her doctoral dissertation, The British-Americans, was published by Little, Brown and Company and won the 1970 Allan Nevins Prize. Her book Founding Mothers and Fathers (1996) was a finalist for the 1997 Pulitzer Prize. Other important works include Liberty's Daughters (1980), and, as co-editor, To Toil the Livelong Day (1987), Women of America (1979), Major Problems in American Women's History (4th ed., 2007), and "In the Devil's Snare" (2002) about the Salem witch trials. She is also noted as one of the authors of the two-volume A People & A Nation, an American history textbook, currently in its eighth edition.