But the basic value of a sustainable society, the ecological equivalent of the Golden Rule, is simple: each generation should meet its needs without jeopardizing the prospects for future generations to meet their own needs.

Who would have predicted a century ago that the richest civilizations in history would be made up of polluted tracts of suburban development dominated by the private automobile, shopping malls, and a throwaway economy? Surely, this is not the ultimate fulfillment of our destiny.

If we attempt to preserve the consumer economy indefinitely, ecological forces will dismantle it savagely. If we proceed to dismantle it gradually ourselves, we will have the opportunity of replacing it with a low consumption economy that can endure.