Elizabeth Cady Stanton was an American writer and activist who was a leader of the women's rights movement in the U.S. during the mid- to late-19th century. She was the main force behind the 1848 Seneca Falls Convention, the first convention to be called for the sole purpose of discussing women's rights, and was the primary author of its Declaration of Sentiments. Her demand for women's right to vote generated a controversy at the convention but quickly became a central tenet of the women's movement. She was also active in other social reform activities, especially abolitionism.
In 1851, she met Susan B. Anthony and formed a decades-long partnership that was crucial to the development of the women's rights movement. During the American Civil War, they established the Women's Loyal National League to campaign for the abolition of slavery, and they led it in the largest petition drive in U.S. history up to that time.