he lives of ordinary people in American cities, but often in dreary and sordid detail, thus earning as one definition of their work the phrase sordid realism.Рb) Differences: ?More specifically, as a literary movement from the late 19th century to the early 20th century, Naturalism was an extension of realism, a reaction against the restrictions inherent in the realistic emphasis on the ordinary, as naturalists insisted that 1)extraordinary is real, too. In place of the middle class realists of a William Dean Howells or a Henry James, the naturalists presented the fringes [outer edge of an area, group or activity] of society, the criminal, the fallen, the down-and-out [poor/destitute person]. They aimed at an even more faithful, unselective representation of reality without moral judgment.