As many of us who grew up in America in the 1960s and 1970s learned, Mad magazine didn’t, as our parents warned us, warp our brains – because our brains were pretty warped to begin with. It was a time when what passed for culture was almost entirely scripted by Madison Avenue, promising that overpriced concoctions of sugar water and aspirin would eliminate all pain, social awkwardness and anxiety, or transport us to happy, sex-crazed beach parties with packs of photogenic young people.