Less a distinct style than the concrete expression of being in a particular era, Pop art began as a revolt against mainstream approaches to art and culture and evolved into a wholesale interrogation of modern society, consumer culture, and the role of the artist and artwork. The movement primary provocation was to defy ideas of the artistic canon or originality by integrating mass market imagery into their works. Whether advertising slogans, famed Hollywood faces, comic-strip-style characters, or the packaging of consumer products, the likes of Robert Rauschenberg, Claes Oldenburg, Andy Warhol, and Roy Lichtenstein knowingly reproduced mundane, everyday images from popular culture.