What are five characteristics in Literary Naturalism?

Naturalism as a literary movement was especially popular in America from 1880 - 1920. Naturalism applies scientific principles of objectivity and detachment to the study of human beings so that the characters in the story may seem like the subjects of scientific case studies. Both Darwinism's concept of natural selection and Freud's concepts of psychology influenced the movement, so these principles may be used to explain the actions of a character. For example, in Jack London's "To Build a Fire," the human character is not even named, and his foolish mistakes are dispassionately contrasted with the more productive actions of his dog. Life is presented as deterministic or even mechanistic since heredity and environment control human actions rather than free will. For example, in Bret Harte's "The Luck of Roaring Camp," despite the men's efforts to improve themselves, their camp and the baby they have reformed for are washed away in a flood. Naturalism often depicts man in conflict with nature, society, or himself. The main characters in Naturalism are usually of the lower socioeconomic classes and often don't have a strong moral compass. The moral failings of individuals or society as a whole, however, are considered dispassionately. The tone is often detached, emotionless, and scientific. When it comes to diction, ugly and unpleasant words may be chosen rather than lyrical or elegant ones. In descriptive passages, an excessive amount of detail may appear, but the arrangement will be informal, even chaotic, in order to show that society and nature are governed by random forces. Artificial or optimistic plot structures are avoided and the action seems more of a "slice of life" than an arc in which can result in characters who change, grow, and develop.