Henri Cartier-Bresson was a French humanist photographer, and also an artist. He was considered a master of candid photography, and was an early user of 35mm film. He pioneered the genre of street photography and viewed capturing what he named the decisive moment as the essence of the very best pictures.
Cartier-Bresson was one of the founding members of Magnum Photos in 1947. In the 1970s he largely discontinued his photographic work, instead opting to paint.