"Although scientific revolutions in how we see the world do occur, the bulk of our scientific understanding comes from the cumulative impact of numerous incremental studies that together paint an increasingly coherent picture of how nature works."

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Only recently serious research into the relationship between photography and art has taken place. Why has it been so long in coming ? In some respects historical research is analogous with that of science. The bringing to light of factual material and the development of ideas is to a large extent cumulative. But when artists themselves were, from about 1910, beginning to tear down the bastions protecting Art in its ivory tower, questioning the idea of Art with a capital 'A', photography was inevitably to assume a new stature both in the eyes of artists and the public, too.

— Aaron Scharf