ZACH DOBSON PHOTOGRAPHY on Instagram: "Jacob Riis was one of the first photographers to use the camera as a tool for social justice. He would go into New York City tenements with his camera and photograph how people lived. Magnesium flash powder for photography was a brand new invention and he used it to be able to see into places that were previously too dark to photograph. His work brought the squalid conditions of the tenements to the attention of the general public and lead to many reforms t