Which movement did Elizabeth Cady Stanton help start?

Elizabeth Cady Stanton was instrumental in founding and advancing the Women's Suffrage Movement in the United States. She is best known for her role in organizing the Seneca Falls Convention in 1848, which was the first women's rights convention. At this convention, she presented the Declaration of Sentiments, a document that asserted the equality of men and women and outlined the rights women should be entitled to, most significantly the right to vote. Stanton's advocacy for women's suffrage was a significant part of her lifelong commitment to achieving equality for women in society.

Her efforts laid the groundwork for the eventual passage of the 19th Amendment in 1920, which granted women the right to vote. The Women's Suffrage Movement sought not only to achieve voting rights but also to challenge the legal and social norms that restricted women's roles in society. Hence, her contributions firmly establish her as a key figure in this pivotal movement in American history.