Naturalism (in art and literature) a style and theory of representation based on the accurate depiction of detail.
Example: The Novel Sister Carrie, the author attached great importance to objectivity, frankness and realist in his writing placed much stress on the decisive role of heredity, desire, destiny, chance, economy, and the environment. In sister specifically several themes were touched. The American Dream, competition, immorality, sex, and wealth and poverty. Among them, naturalistic themes such as immorality and sex permeate this novel, which unfolds an immortal world.