 In the first year of World War I , Macmillan spoke for the peace @-@ seeking women of the United Kingdom at the International Congress of Women , a peace congress convened at The Hague . Afterward , she met with world leaders such as President Woodrow Wilson , whose countries were still neutral , to present the proposals formulated at The Hague . Wilson subsequently used these proposals as some of his Fourteen Points , his justification for making war to forge a lasting peace . At war 's end , Macmillan served as a delegate at the Paris Peace Conference , 1919 , and helped encourage the founding of the League of Nations . Macmillan tried but did not succeed in getting the League to establish nationality for women independent of the nationality of their husbands . 
