Jared Diamond: How Civilizations End (How We Can Escape the Fate of those that Died)Roundup: Talking About History
Jared Diamond, in th NYT (1-1-05)
[Jared Diamond, who won the 1998 Pulitzer Prize in general nonfiction for "Guns, Germs and Steel: The Fates of Human Societies," is the author of the forthcoming "Collapse: How Societies Choose or Fail to Succeed."]
NEW Year's weekend traditionally is a time for us to reflect, and to make resolutions based on our reflections. In this fresh year, with the United States seemingly at the height of its power and at the start of a new presidential term, Americans are increasingly concerned and divided about where we are going. How long can America remain ascendant? Where will we stand 10 years from now, or even next year?
Such questions seem especially appropriate this year. History warns us that when once-powerful societies collapse, they tend to do so quickly and unexpectedly. That shouldn't come as much of a surprise: peak power usually means peak population, peak needs, and hence peak vulnerability. What can be learned from history that could help us avoid joining the ranks of those who declined swiftly? We must expect the answers to be complex, because historical reality is complex: while some societies did indeed collapse spectacularly, others have managed to thrive for thousands of years without major reversal.
When it comes to historical collapses, five groups of interacting factors have been especially important: the damage that people have inflicted on their environment; climate change; enemies; changes in friendly trading partners; and the society's political, economic and social responses to these shifts. That's not to say that all five causes play a role in every case. Instead, think of this as a useful checklist of factors that should be examined, but whose relative importance varies from case to case.
For instance, in the collapse of the Polynesian society on Easter Island three centuries ago, environmental problems were dominant, and climate change, enemies and trade were insignificant; however, the latter three factors played big roles in the disappearance of the medieval Norse colonies on Greenland. Let's consider two examples of declines stemming from different mixes of causes: the falls of classic Maya civilization and of Polynesian settlements on the Pitcairn Islands.
Maya Native Americans of the Yucatan Peninsula and adjacent parts of Central America developed the New World's most advanced civilization before Columbus. They were innovators in writing, astronomy, architecture and art. From local origins around 2,500 years ago, Maya societies rose especially after the year A.D. 250, reaching peaks of population and sophistication in the late 8th century.
Thereafter, societies in the most densely populated areas of the southern Yucatan underwent a steep political and cultural collapse: between 760 and 910, kings were overthrown, large areas were abandoned, and at least 90 percent of the population disappeared, leaving cities to become overgrown by jungle. The last known date recorded on a Maya monument by their so-called Long Count calendar corresponds to the year 909. What happened?
A major factor was environmental degradation by people: deforestation, soil erosion and water management problems, all of which resulted in less food. Those problems were exacerbated by droughts, which may have been partly caused by humans themselves through deforestation. Chronic warfare made matters worse, as more and more people fought over less and less land and resources.
Why weren't these problems obvious to the Maya kings, who could surely see their forests vanishing and their hills becoming eroded? Part of the reason was that the kings were able to insulate themselves from problems afflicting the rest of society. By extracting wealth from commoners, they could remain well fed while everyone else was slowly starving.
What's more, the kings were preoccupied with their own power struggles. They had to concentrate on fighting one another and keeping up their images through ostentatious displays of wealth. By insulating themselves in the short run from the problems of society, the elite merely bought themselves the privilege of being among the last to starve....
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