Very useful reading:
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.” His article, The Ends of the World as We Know Them was published January 1, 2005:

History also teaches us two deeper lessons about what separates successful societies from those heading toward failure. A society contains a built-in blueprint for failure if the elite insulates itself from the consequences of its actions. That’s why Maya kings, Norse Greenlanders and Easter Island chiefs made choices that eventually undermined their societies. They themselves did not begin to feel deprived until they had irreversibly destroyed their landscape.
Could this happen in the United States? It’s a thought that often occurs to me here in Los Angeles, when I drive by gated communities, guarded by private security patrols, and filled with people who drink bottled water, depend on private pensions, and send their children to private schools. By doing these things, they lose the motivation to support the police force, the municipal water supply, Social Security and public schools. If conditions deteriorate too much for poorer people, gates will not keep the rioters out. Rioters eventually burned the palaces of Maya kings and tore down the statues of Easter Island chiefs; they have also already threatened wealthy districts in Los Angeles twice in recent decades.