No ignoramus—no writer who has kept himself innocent of education—has ever produced great art. One trouble with having read nothing worth reading is that one never fully understands the other side of one’s argument, never understands that the argument is an old one (all great arguments are), never understands the dignity and worth of the people one has cast as enemies. Witness John Steinbeck’s failure in The Grapes of Wrath. It should have been one of America’s great books. But while Steinbeck knew all there was to know about Okies and the countless sorrows of their move to California to find work, he knew nothing about the California ranchers who employed and exploited them; he had no clue to, or interest in, their reasons for behaving as they did; and the result is that Steinbeck wrote not a great and firm novel but a disappointing melodrama in which complex good is pitted against unmitigated, unbelievable evil. [...]