
I've been reading Jared Diamond's "Collapse: How Societies Choose to Fail or Succeed". Diamond studies a number of societies from the past for lessons we can use today. He discusses the usual suspects (Easter Island, the Maya, the Anasazi, etc.) within a five-point framework:
- Cumulative environmental damage
- Gradual climate change
- Conflict with neighbors
- Support from neighbors
- Adaptability
The most interesting story is that of Viking Greenland. The Vikings settled Greenland during the Medieval Warm Period (984 AD) and vanished sometime in the 15th century at the beginning of the Little Ice Age. Climate change is the obvious explanation, with the colder weather reducing crop yields and the increase in sea ice making it more difficult for ships from Iceland to get there.
And yet, the Inuit had the technology to survive in harsher climates than the Vikings' protected fjords. All the Vikings needed to do was copy the Inuit. Here is where the last factor, adaptability or the lack thereof, comes into play. The Vikings thought of themselves as Europeans, and apparently preferred to die as Vikings than live as skraelings.
The modern notion of sustainability seems to be about reaching equilibrium with a more or less constant environment. Equilibrium leads to conservatism which leads to a lack of adaptability. But nature is not constant. Sooner or later, Mother Nature will try to kill us with earthquakes, tsunamis, hurricanes, tornados, floods, droughts, forest fires, ice storms... even if we get our carbon dioxide under control. When that happens, we need adaptability, not sustainability.