How it works

The idea began in Kurt Vonnegut’s master’s thesis at the University of Chicago (1947), which the university rejected. He returned to it in Palm Sunday (1981) and A Man Without a Country (2005). The method puts the main character’s fortune, from ill to good, on the vertical axis and time on the horizontal, so every story leaves a line that can be set beside others. A 2016 study of Project Gutenberg fiction found that six such arcs dominate.

The row on the timeline traces the shape Vonnegut called Man in Hole. Somebody, comfortable (0–15%) starts the hero a little above even. Fortune drops through Gets into trouble (15–45%), and The bottom of the hole (45–60%) is the low point, sitting across the middle of the story. Gets out again is the long climb from 60% to 90%, and Ends up better off (90–100%) leaves the hero higher than where they began.

This model measures fortune, and events count only for how they move the line. That puts its lowest point at 45–60%, the zone where most structures place a midpoint, while the shared lowest point near 72% falls partway up the climb. Freytag’s Pyramid is close to its mirror image, rising to a climax at 50% and falling after it. Vonnegut names no inciting incident or climax, and the curve says nothing about who wants what.

It helps most in a pitch and in a read-through for feeling. Naming a shape such as Man in Hole or Cinderella hands a listener the whole ride in a few words. For a draft, rating each scene from bad fortune to good and plotting the scores shows where the line goes flat or where a drop comes too early. Because the graph records mood and leaves out events, it works best beside an event-based model such as Save the Cat! or Field’s Paradigm.