Jane Addams (1860 - 1935), the cofounder of Hull-House in Chicago, won the 1931 Nobel Peace Prize for her career of public service and advocacy for peace.
Emily G. Balch (1867 - 1961) was a distinguished sociologist who taught at Wellesley College and was the longtime International Secretary of the later-founded Women's International League for Peace and Freedom. In 1946, she was honored with the Nobel Peace Prize.
Alice Hamilton (1869 - 1970), a medical investigator and social activist, was the first industrial physician in the United States and also the first woman to join the faculty of Harvard University.