The sustainability revolution will be organic. It will arise from the visions, insights, experiments and actions of billions of people. The burden of making it happen is not on the shoulders of any one person or group. No one will get the credit, but everyone can contribute.

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

The world is a complex, interconnected, finite, ecological - social - psychological - economic system. We treat it as if it were not, as if it were divisible, separable, simple, and infinite. Our persistent, intractable global problems arise directly from this mismatch.

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?

A good leader sets the right goals, gets things moving, and helps us to discover that we already know what to do.

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?

A knowledgeable and courageous U.S. president could help enormously in leading the world's nations toward saving the climate.