Claude Levi-Strauss suggested that narratives are driven by binary opposites such as light/dark, good/evil, etc. and move towards equilibrium or resolution. Vladimir Propp studied Russian folk tales and identified a limited number of character types. Tzvetan Todorov identified most narratives follow a three-part structure of an initial equilibrium, a disturbance, and a final resolution or new equilibrium. Roland Barthes believed texts have denotations and connotations that can have open or closed meanings. Robert McKee developed a five-part narrative structure of an inciting incident, progressive complications, crisis, climax, and resolution.