Article Introduction: At the heart of every GM is a storyteller. This trait appears both when structuring the plot before the game and improvising at the table in response to player actions. Therefore, a GM should be familiar with common story structures.
This topic has previously been addressed by RPG writers elsewhere, but it also pays for GMs to be familiar with some literary theories of story structure. Star Wars and Glorantha, for example, both embody the writings of Joseph Campbell. This essay introduces another story theorist: Vladimir Propp.