While I find Epstein's characterization of our 71-chapter volume—which covers everything from the publishing business to Henry James, dime novels to modernist aesthetics—closed-minded and inaccurate, his rant does raise a good question. What is literary history, and how should it be brought to bear on the genre of the novel? The Cambridge History of the American Novel is really a biography of the novel as it intersects with American history. Part of the explanation for the changing shape of the American novel involves individual genius (i.e., great writers), but it also involves the stuff of national history: wars, slavery, emancipation, democracy, territorial expansion, civil rights, women's rights, immigration, and capitalism.
This reminds me of the professor referred to in The Pooh Perplex who was working on a book called All Previous Thought.