What was consistent in Poe's work was not a single theory, but rather wit, playfulness, concern for the strong effect, a bin of recyclable allusions, anecdotes and quotations, and a craftsman's discipline. Poe's writing on theory is of a piece with his fiction, poetry, and journalism. The Levines explain how these critical statements also tie tightly to the social, political, economic, and technological history of the world in which Poe lived.