Cultures persist because of a confidence in themselves. Common agreement binds them together, and they endure for as long as their collective understanding is based on reality. But what happens if the assumptions that they make are faulty? The incongruity between the beliefs motivating their behaviour and the actual reality in which they live instigates increasing conflicts until reality asserts itself with a dispassionate shrug and the culture experiences the discomfort of a minor reset or the trauma of a major one.