TBG

My pet theory is that narrative logic is an evolutionary adaptation that makes it possible for humans to invent and share ad hoc rules and tribal ethics in a simple and efficient way.

I would think this is almost certainly true. If a behavior works >80% of the time and does not result in the death of a large number of those who employ it when it fails, it is highly likely to persist. If it persists, genetic changes that favor are more likely to emerge. Plus the narrative can always change in response to events. The neuro-physiological bases of social speech?

"It is not necessary to have hope in order to persevere."