Todorov theorized that all stories have a beginning, middle, and end with an initial state of equilibrium disrupted by some event causing disequilibrium, which is then restored by the end. Barthes explored how readers derive pleasure from narratives solving mysteries or fulfilling expectations. Freud proposed the id, ego, and superego as parts of the psyche. Propp identified common character archetypes like heroes, villains, and donors. Strauss saw narratives as resolving conflicts between opposites. Clover analyzed the "final girl" trope of slasher films identifying with the sole female survivor.