F.R. Leavis's "eat up your broccoli" approach to fiction emphasises this junkfood/wholefood dichotomy. If reading a novel--for theeighteenth century reader, the most frivolous of diversions--did not, by the middle of the twentieth century, make you a better person in some way, then you might as well flush the offending volume down the toilet, which was by far the best place for the undigested excreta of dubious nourishment.