Tzvetan Todorov is a Bulgarian French historian born in 1939. He has written extensively on literary theory and history. Todorov proposed a theory of plot structure that identifies 5 stages: 1) equilibrium at the beginning, 2) a disruption to the equilibrium, 3) realization of the problem caused by the disruption, 4) an attempt to restore order, and 5) a return to the initial equilibrium. The summary uses The Simpsons movie as an example that follows this 5 stage structure.