Stories define us. Since early cave dwellers left their graffiti in Lascaux, listening to and telling stories have moved people. Stories are powerful: They give meaning and context to what would otherwise be a collection of easily forgettable facts. Stories invoke the imagination so that listeners begin to own them almost as much as the teller. In fact, there’s a growing body of research that points to the power of narrative not just as a way to engage people, but as the only way to change deeply entrenched views.