A World Feels Real When Its Customs Have Edges

A useful worldbuilding lesson: a custom feels more believable when it solves an ordinary problem—and creates a small tension of its own.

Imagine a neighborhood where porch lights stay on until every household has eaten. It suggests care: no one has to return to a dark street. But what about the neighbor who works late and wants the block to stop waiting? That friction makes the custom more than decoration; it gives the imagined community something to negotiate.

When a fictional tradition feels flat, ask two things: Who does it help, and who has to adapt to it?