To begin, we must first understand the historical context of the island that enabled a uniquely sustainable culture to develop. Almost 80% of Japan 's land mass consists of sparsely populated forested mountains (Diamond, 2005, p.303). Rolett explains that, through volcanic activity, ashes often renewed and enriched the Japanese soils and river systems below (p.4). The island also received higher than normal rainfall, …show more content…
According to Rolett, other pacific island civilizations in this period would repeatedly shift irrigation practices (p.7). By doing so, would deforest areas, typically with fire, for human food production while diminishing the island’s ecosystem. Comparatively, Japan’s irrigated agriculture allowed for greater yields of rice, while reclaiming less land for agriculture. In the long run, simple irrigated agriculture allowed Japan to avoid the consequences of timber shortages, erosion and runoff caused by expanding field systems (Rolett, p.5). Island cultures, like Japan, were forced to adapt quickly to avoid potential pyramid schemes, another of Tainter’s aspects of collapse, based around constant, and eventually destructive,