Soldier Thrown in Air - Public domain dedication, National Gallery of Art

Lewis Hine (1874–1940) was trained to be an educator in Chicago and New York. A project photographing on Ellis Island with students from the Ethical Culture School in New York galvanized his recognition of the value of documentary photography in education. Soon after, he became a sociological photographer, establishing a studio in upstate New York in 1912. For nearly ten years Hine was the photographer for the National Child Labor Committee, contributing to exhibitions and the organization's publication, The Survey. Declaring that he "wanted to show things that had to be corrected," he was one of the earliest photographers to use the photograph as a documentary tool.