Even in the nineteenth century, when photography was thought to be so evidently in need of defense as a fine art, the line of defense was far from stable. Julia Margaret Cameron’s claim that photography qualifies as an art because, like painting, it seeks the beautiful was succeeded by Henry Peach Robinson’s Wildean claim that photography is an art because it can lie. In the early twentieth century Alvin Langdon Coburn’s praise of photography as “the most modern of the arts,” because it is a fast, impersonal way of seeing, competed with Weston’s praise of photography as a new means of individual visual creation. In recent decades the notion of art has been exhausted as an instrument of polemic; indeed, a good part of the immense prestige that photography has acquired as an art form comes from its declared ambivalence toward being an art. When photographers now deny that they are making works of art, it is because they think they are doing something better than that. Their disclaimers tell us more about the harried status of any notion of art than about whether photography is or isn’t one.
— Susan Sontag, On Photography, 1977