Jared Diamond compares the collapses of human societies over time and places with stressors occurring in present days. He looks at how the role of violence, turmoil, chaos, conflict, and class warfare emerge from shortages of water, food and energy. Warfare is a symptom not a cause of turmoil. Consumerism and its consequences of deforestation, desertification, malnutrition and disease depletes resources that cannot be replaced quickly and easily. Successful cultures need sustainable food supplies from local sources, organically grown agriculture to preserve healthy soils, and public potable water available for all. Long term thinking takes into account more people, more consumption and more booms and busts. We have a moral imperative to pay attention.