"For Want of a Nail" may refer to:
- Alternate Self: Another version of a character, often from a different timeline.
- Alternate Universe Fic: Applies when the Alternate Universe is distinguished by changing an aspect of canon and following the consequences.
- Butterfly of Doom: A tiny change in the timeline alters the future drastically for the worse.
- Contrived Coincidence: Something that is statistically very unlikely facilitates specific plot points.
- Inciting Incident: The event that sets the plot in motion.
- In Spite of a Nail: The future that results from a change in the timeline still closely resembles the unchanged timeline.
- It Began with a Twist of Fate: A mundane decision begins the events of a story.
- Point of Divergence: The point at which an Alternate History diverges.
- Split Timelines Plot: Multiple Alternate Timelines shown in a story after a diverging event.
- Unwitting Instigator of Doom: The unlikely and/or meager actions of a single character cause a significant disaster.
- What If?: Changing an existing factor in a narrative to tell a new story.
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