Models can easily become so complex that they are impenetrable, unexaminable, and virtually unalterable.

George W. cares as much about climate change as you would expect from a Texas oilman

We don't think a sustainable society need be stagnant, boring, uniform, or rigid. It need not be, and probably could not be, centrally controlled or authoritarian. It could be a world that has the time, the resources, and the will to correct its mistakes, to innovate, to preserve the fertility of its planetary ecosystems. It could focus on mindfully increasing quality of life rather than on mindlessly expanding material consumption and the physical capital stock.

How do we appreciate the good without letting it be the enemy of the perfect? How do we keep a step in the right direction from becoming a stopping point? How do we get beyond shades of insipid light green?

Since the Earth is finite, and we will have to stop expanding sometime, should we do it before or after nature's diversity is gone?

Glaciers are almost gone from Glacier National Park

Mesarovic and Pestel are critical of the Forrester-Meadows world view, which is that of a homogeneous system with a fully predetermined evolution in time once the initial conditions are specified.