After World War I broke out in Europe in 1914, many American women voiced their opposition to all wars.
In 1915 some 3,000 women gathered in Washington, D.C., to form the Woman’s Peace Party, headed by Jane Addams. “We demand that women be given a share in deciding between peace and war,” they asserted.
Addams also chaired an international meeting of women in the Netherlands in 1915, where a peace committee was formed.
This group later became the Women’s International League for Peace and Freedom (WILPF).