Naturalists are generally more pessimistic than realists. For example, a realist believes that people can make moral choices, while a naturalist doubts they can. Naturalism holds true that all actions are determined by heredity and/or environment and that individuals are "trapped" by driving forces such as money, sex, and power. Consequently, naturalist writers deal with the baser aspects of life and hold more pessimistic perspectives. However, they still celebrate the hero in a situation who is bold enough to challenge nature, even when the odds are against him.
Because of naturalism, modern literature perhaps reveals life more honestly. In introduced a genre of writing that allowed the author to communicate the uninhibited truth, allowing his or her audience to distinguish between what is ethically good and right and what is ethically evil and wrong.