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Elizabeth Cady Stanton was born on November 12, 1815. She was an American social reformer, women's rights activist, abolitionist, and suffragist who played a pivotal role in the women's suffrage movement. She was the principal author of the Declaration of Sentiments, which was adopted at the Seneca Falls Convention in 1848. Stanton's work helped to lay the foundation for the women's suffrage movement in the United States.