Owen Hulatt in Aeon: "In 1964, [Arthur C.] Danto attended an exhibition at the Stable Gallery in New York. He came across Andy Warhol’s artwork Brillo Boxes (1964) – a visually unassuming, highly realistic collection of plywood replicas of the cardboard boxes in which Brillo cleaning products were shipped. Danto left the exhibition dumbstruck. Art, he was convinced, had ended. One could not tell the artworks apart from the real shipping containers they were aping. One required something else, something outside the artwork itself, to explain why Warhol’s Brillo Boxes were art, and Brillo boxes in the dry goods store were not. Art’s progress was over, Danto felt; and the reign of art theory had begun."