
California, March 1937. "Toward Los Angeles." View full size. Medium format nitrate negative by Dorothea Lange for the Farm Security Administration.
...Margaret Bourke-White's famous shot, "There's No Way Like the American Way", also from 1937.
It made me think of "Of Mice and Men" by John Steinbeck.
Now THAT is a photograph. Such powerful social commentary captured in a single image. Lange couldn't have gotten a better shot.