Just finished this. Fantastic book. It's a study of the relationship between resource management, enviornmental damage, and the survival of societies. Covers lots of exmaples over time and around the world (Easter Island, Norse in Greenland, Iceland, tropics, etc). It's all about balancing population, and resource use (or abuse). The places that used what they had faster than it recovered, and/or allowed their populations to grow beyond those capabilities, failed. Those who maintained their populations, and were caretakers of their resources, lived. Gives you a good perspective on the world today, through the study of history. Lots to learn from these lessons.