Fallacy of the single cause

What it is

Attributes an outcome to one cause when it had several that interacted.

Example "The company failed because of one bad CEO."

Fundamental attribution error bias
Blaming one person's character for an outcome is a single-cause explanation that ignores circumstances.
Hindsight bias bias
After the fact, the cause seems obvious and singular.
Post hoc ergo propter hoc fallacy
Post hoc picks out one earlier event as the cause, and single-cause thinking ignores the other contributors.
Narrative fallacy bias
A single-cause explanation makes a clean story, which is what story bias rewards.