American literature has, since the time of the Puritans, featured the jeremiad as a prolonged complaint, a prophet's indictment of his society characteristic of work such as the muckrakers' novels or Allan Ginsberg's Howl. Doctorow struggles to accommodate this form to his artistry (as successful practitioners of the work have always done). To this end, he has repeatedly adapted genres such as the Western, the romance, and the detective novel, often playing with accepted conventions, and thus avoiding didacticism.