Vladimir Propp analyzed 100 Russian folk tales and identified common narrative components, which he organized into a theory. He identified 8 character types that frequently appear: the villain, helper, princess/prize, father, donor, hero, false hero, and dispatcher. Propp's analysis found that tales share a common structure involving an equilibrium that is disrupted, a hero's journey to restore equilibrium, and a new conclusion/equilibrium. His work established structuralism in folklore and narrative studies.