Lillian Wald was a pioneering figure in public health nursing and a social reformer in the late 19th and early 20th centuries. Born on March 10, 1867, in Cincinnati, Ohio, Wald is best known for founding the Henry Street Settlement in New York City in 1893. She dedicated her life to improving healthcare for the poor and underserved, advocating for social justice, and establishing community-based health care systems.