The demand for the enfranchisement of American women was first seriously formulated at the Seneca Falls Convention (1848). After the Civil War, agitation by women for the ballot became increasingly vociferous. In 1869, however, a rift developed among feminists over the proposed 15th Amendment, which gave the vote to black men. Susan B. Anthony, Elizabeth Cady Stanton, and others refused to endorse the amendment because it did not give women the ballot. Other suffragists, however, including Lucy Stone and Julia Ward Howe, argued that once the black man was enfranchised, women would achieve their goal. As a result of the conflict, two organizations emerged. Stanton and Anthony formed the National Woman Suffrage Association to work for suffrage on the federal level and to press for more extensive institutional changes, such as the granting of property rights to married women. Stone created the American Woman Suffrage Association, which aimed to secure the ballot through state legislation. In 1890 the two groups united under the name National American Woman Suffrage Association (NAWSA). In the same year Wyoming entered the Union, becoming the first state with general women's suffrage (which it had adopted as a territory in 1869).
As the pioneer suffragists began to withdraw from the movement because of age, younger women assumed leadership roles. One of the most politically astute was Carrie Chapman
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