Pacifist, social reformer, and women's rights activist, Jane Addams founded Hull House, a Chicago institution where she lived with other social reformers and worked to improve conditions in the city's slums. Hull House was a model for other settlements houses in the nation. Addams became president of the Women's International League for Peace and Freedom in 1919 and, together with Nicholas Murray Butler, was awarded the Nobel Peace Prize in 1931. An author, her books include Democracy and Social Ethics and Twenty Years at Hull House.