Jacob Riis is often credited as the father of documentary photography for his work documenting the living conditions of the poor in New York City in the late 19th century.

Documentary photography was initially used as a tool to raise awareness about social issues and promote social change.

Dorothea Lange is renowned for her powerful images of the Great Depression, including her famous photograph titled 'Migrant Mother'.

The Farm Security Administration (FSA) commissioned photographers to document the Great Depression, resulting in a collection of powerful images that captured the struggles of rural America.

Robert Capa is widely recognized for his photojournalism during World War II and the Vietnam War, capturing iconic images that conveyed the realities of war.

Magnum Photos is a renowned photo agency co-founded by Robert Capa, David Seymour, and Henri Cartier-Bresson in 1947.

Gordon Parks is celebrated for his powerful photographs documenting the civil rights movement in the United States.

The Bitter Years was an exhibition held in 1938 that featured the work of documentary photographers during the Great Depression.

Walker Evans is renowned for his photographs of the Dust Bowl, capturing the devastating effects of the drought on the American Midwest.

Let Us Now Praise Famous Men is a book by James Agee and Walker Evans that features Dorothea Lange's photographs of the Great Depression.

Ansel Adams is renowned for his stunning photographs of the American West, particularly his iconic images of Yosemite National Park.

The Vietnam War Photographs was an exhibition held in 1972 that featured the work of documentary photographers during the Vietnam War.

Gordon Parks is celebrated for his powerful photographs documenting the civil rights movement in the United States.

The Bitter Years was an exhibition held in 1938 that featured the work of documentary photographers during the Great Depression.

Walker Evans is renowned for his photographs of the Dust Bowl, capturing the devastating effects of the drought on the American Midwest.