Tzvetan Todorov is a historian and essayist who developed a theory of narrative structure. He proposed that narratives follow a circular pattern of equilibrium, disruption, and new equilibrium. Specifically, they begin with an initial stable state, experience some event that disturbs the order, and conclude after the disruption has been addressed and a new stable state restored, with the characters or situation transformed. According to Todorov, the middle portion can depict actions outside of social norms, and some stories involve multiple disruptions before achieving resolution.