the.com/backstory

The excuse your present self prepared in advance, disguised as history.

means The background events and history that explain why a person or character is the way they are now.

from A 20th-century compound built from 'back' (behind, prior) plus 'story' — coined in theater and screenwriting circles to name the invented history a writer builds behind a character, the life implied before the first scene starts. It stayed mostly a Hollywood trade term for decades before leaking into everyday speech for anyone's personal history or cover narrative.

origin
coined for film scripts, not therapy sessions
function
makes villains sympathetic without making them right
danger
everyone is the hero of their own backstory
overuse
prequels exist because backstory sells better than story
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