Historical tales are empirical ideas. We believe these evidence-based reconstructions of real past events with varying degrees of confidence. We can prove or disprove their related empirical implications.
Good common knowledge is the Grand Rational Framework. It is our common-floor public belief, and it evolves knowledge anchored to the material world, where only evidence-grounded reasoning reshapes what we collectively treat as true.
The split separates our ideas and the material world. To live in harmony with nature, embrace the idea that our rational ideas must be internally coherent, but only empirical contact with reality justifies belief.