Using concepts of cognitive evolutionary theory, the author explores how narrative storytelling manifests itself in Denis Johnson's novella Train Dreams. The novella form is also discussed, focusing on its manipulation of linear time, its naturalization of supernatural elements, and its deconstruction of dichotomous relationships. Utilizing the novella's distinct structural and thematic elements, Johnson's text shows the myth of American expansionism and industrial progress and that of Kootenai holism in collision, resulting in a narrative renegotiation that seeks to affirm coexistence and complexity.