The influential social reformer known for her advocacy for children's rights is Jane Addams. She co-founded the Hull House in Chicago, providing social services and educational programs to immigrant families. Addams fought for issues such as child labor laws and women's suffrage, emphasizing the importance of social responsibility. Her visionary approach to social work combined activism with a deep empathy for marginalized communities. Awarded the Nobel Peace Prize in 1931, Addams' efforts laid the groundwork for modern social work and continue to inspire advocates for social justice today.