She would receive the 1931 Nobel Peace Prize as one of that minority of Nobel Peace Prize winners over the years who actually met the qualifications laid out in Alfred Nobel’s will. Addams worked in many fields toward the creation of a society capable of living without war. In 1898 Addams joined the Anti-Imperialist League to oppose the U.S. war on the Philippines. When World War I began, she led international efforts to try to resolve it. She presided over the International Congress of Women in The Hague in 1915. And when the United States entered the war she spoke out publicly against the war in the face of vicious accusations of treason. She was the first leader of the Women’s International League for Peace and Freedom in 1919 and of its predecessor organization in 1915. Jane Addams was part of the movement in the 1920s that made war illegal through the Kellogg-Briand Pact. She helped found the ACLU and the NAACP, helped win women’s suffrage, helped reduce child labor, and created the profession of social worker, which she viewed as a means of learning from immigrants and building democracy, not as participation in charity. She created Hull House in Chicago, started a kindergarten, educated adults, supported labor organizing, and opened the first playground in Chicago. Jane Addams authored a dozen books and hundreds of articles. She opposed the Treaty of Versailles that ended World War I and predicted that it would lead to a German war of revenge.