Who is called the pioneer of modern documentary photography?

/kloc-At the end of 0/9, salon photography with London, Paris and new york as the center and the pursuit of "painting" was all the rage. But in Paris, France, there is a photographer living in his own world. He ran around the street with his camera on his back, recording the face of the city. He is the French photographer Ajie, who is known as "the pioneer of modern documentary photography".