The well-known social reformer who advocated for children and women's rights in the 19th century is Jane Addams. As a pioneer of the settlement house movement, she co-founded Hull House in Chicago, which provided critical social services to immigrants and the urban poor. Addams's work emphasized the importance of social justice and community engagement, advocating for reforms in labor laws, education, and suffrage. Her efforts to address the needs of marginalized groups earned her the Nobel Peace Prize in 1931, making her a key figure in the history of social reform in America.