Cultural tightness and resilience against environmental shocks in nonindustrial societies.

With climate change intensifying, building resilience against climate-related shocks is now a global imperative. Historically, many societies have faced natural hazards, with some adapting through specific social and cultural practices. Understanding these responses is key to developing modern sustainability strategies. Here, we address this issue by developing a mathematical model explicitly accounting for various environmental shock dimensions, cooperative activities common in nonindustrial societies, and decision-making based on material factors as well as personal values and social norms. Our results suggest that cultural looseness can be vital for effectively responding to mild, slow-onset shocks, leading to moderate cooperation and minimal cultural change. Conversely, coping with severe shocks requires an intermediate level of cultural tightness, fostering significant cultural transformation and high cooperation. While tight societies struggle with new shocks, they may handle regular, severe, fast-onset shocks better than do loose societies. Our research enhances understanding of environmental impacts on cooperation, cultural tightness, and social resilience, and highlights cultural adaptations useful in addressing current environmental challenges like global warming, floods, tornadoes, and soil degradation.