The influential social reformer known for her work on women's rights in the 19th century is Susan B. Anthony. A key figure in the women’s suffrage movement, Anthony dedicated her life to advocating for women's rights, particularly the right to vote. Alongside other prominent activists, she founded the National Woman Suffrage Association in 1869 and played a crucial role in organizing events and campaigns to promote gender equality. Her efforts helped pave the way for future advancements in women's rights, and she is remembered as a pioneering figure who fiercely challenged societal norms and fought for justice.