Geography has never been more interesting. Jared takes us through how past societies undermined themselves by damaging their environment. Population growth forced people to adopt intensified methods of agricultural production, and this led to deforestation, soil erosion, water management problems, overhunting or overfishing etc. He gives example of how a naïve introduction of alien species like foxes in Australia exterminated many native mammals because the species there had just not evolved to protect themselves against such a predator. He also explains how overpopulation is a double whammy. First the absolute numbers keep rising, and then the environmental impact rises multi-fold as The Third World tries to catch up with the higher living standard of the First World. In grim Malthusian style, Rwanda had one of the highest population density and scarcity of resources, and that preceded one of the world’s worst genocides (about a million people were murdered within 6 weeks, 11% of the population).
Statistics are alarming: half of the world’s original area of forests is gone; “one-third of the world’s coral reefs – the oceanic equivalent of tropical rainforests – … have already been severely damaged”; “soils of farmlands… are being carried away at rates between 10 and 40 times the rates of soil formation”… He brings forward the alarm of climate change: Global temperature will rise at least by 1.5 degree, and probably by 5 degree, over the next century (the last Ice Age happened when temperatures increased by 5 degree).
The question is “why did some past societies fail to see the mess they were getting into and that (one would think in retrospect) must have been obvious?” Often because of the creeping (as opposed to sudden) nature of these changes, they may not be perceptible. And group think and conflicting priorities makes a clear solution difficult. Jared explains the challenges of collective decision making: “when a small cohesive group is trying to reach a decision under stressful circumstances, the stress and the need for mutual support and approval may lead to suppression of doubts and critical thinking, sharing of illusions, a premature consensus, and ultimately a disastrous decision.” Not very different from business organizations too!
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