My dad was just a big Joseph Campbell nut.

Trey Parker’s remark is a casual, slightly comic way of crediting a formative influence: his father’s enthusiasm for Joseph Campbell, the popularizer of the “hero’s journey” model of mythic storytelling. Read in context, it typically signals that Parker encountered Campbell’s ideas early and indirectly—through family conversation or recommended reading—rather than through formal academic study. The line also hints at how pop-culture creators absorb high-level narrative theory in everyday life, then repurpose it for entertainment. In Parker’s case, it can be taken as a clue to why he is attentive to story structure and archetypal beats even when writing satire.