Dorothea Lange went to the rough places others would not, she captured the plight in the daily lives of people through her photos. She documented the reality of the Dust bowl, the Great depression, and the Japanese American Internment. She eventually became a part f Americas history with her photographer being a look back to the past so people in the present can see how it used to be. She also did all his while struggling with Polio herself.
Lewis Hine
Lewis Hine became the staff photographer the Russell sage foundation he photographed life in the steel-making districts and people of Pittsburgh, Pennsylvania. He also photographed the child labor in the city and quit his teaching job to continue photography for the child labor committee. His work was very dangerous he was essentially a spy photographer against these in humane companies. To gain entry to the mills, mines and factories, Hine was forced to assume many guise he was a fire inspector, postcard vendor, bible salesman, or even an industrial photographer making a record of factory machinery.
Eadweard Muybridge
Eadweard Muybridge was an American western photographer he did portraiture and his famous stereographs. In 1872 he captured a horse race for studies and caught what the human eye couldn't see normally of a horse galloping to see they lift all feet while galloping. He continued his motion studies with many other things such as a man walking, a deer running, a man jumping over a rail, a bison cantering, and much more.