At civilizational scale, play (in the form of art, exploration, humor, experimentation, and low-stakes deviation from norms) serves as an essential corrective mechanism. It prevents the over-consolidation of narratives and rituals that would otherwise lead to brittleness.
When play is suppressed, marginalized, or commodified to the point of losing its exploratory character, civilizations lose one of their primary defenses against fundamentalism, dogmatism, and eventual fracture under changing conditions.