The document discusses three theorists - Tzvetan Todorov, Vladimir Propp, and Claude Levi-Strauss - and their theories on narrative structure. Todorov proposed that all narratives follow the structure of equilibrium, disequilibrium, and a return to equilibrium. Propp identified common character archetypes in stories, including heroes, villains, helpers, and dispatchers. Levi-Strauss believed narratives are driven by binary oppositions such as good vs evil, young vs old, and male vs female. Examples of films that do and do not support each theorist's ideas are provided.