Forty two years ago, in 1978, the Museum of Modern Art (MOMA) delivered a press release for a photographic exhibition presenting major shifts in photography over the previous twenty years. John Szarkowski was head of the photography department at MOMA at the time and he believed that these changes were repositioning photography as an artform in America, calculating a new cutting edge structure to the medium. “The two creative motives that have been contrasted here are not discrete. Ultimately each of the pictures in this book is part of a single, complex, plastic tradition. Since the early days of that tradition, an interior debate has contested issues parallel to those…