Professor Bob Williams examines the essential elements that give ecosystems their durability. These key characteristics are: self-regulating cycles of key materials, a plentiful and durable energy source, an ability to adjust to changing circumstances, and the capacity for resiliency in the face of unpredictable disruptions. In separate chapters, each of these natural attributes are applied to our economy and 20 polices are recommended to shift our economy toward each of these objectives. The policies include marketable waste emission permits, a "carbon" tax, split-rate property taxation,...