Born in Hoboken, New Jersey, in 1864, and schooled as an engineer in Germany, Alfred Stieglitz returned to New York in 1890 determined to prove that photography was a medium as capable of artistic expression as painting or sculpture. As the editor of Camera Notes, the journal of the Camera Club of New York—an association of amateur photography enthusiasts—Stieglitz espoused his belief in the aesthetic potential of the medium and published work by photographers who shared his conviction. When the rank-and-file membership of the Camera Club began to agitate against his restrictive editorial policies, Stieglitz and several like-minded photographers broke away from the group in 1902 to form the Photo-Secession, which a...