No one can define or measure justice, democracy, security, freedom, truth, or love. No one can define or measure any value. But if no one speaks up for them, if systems aren’t designed to produce them, if we don’t speak about them and point toward their presence or absence, they will cease to exist.

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?

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

There are no separate systems. The world is a continuum. Where to draw a boundary around a system depends on the purpose of the discussion.

Glaciers are almost gone from Glacier National Park

Biodiversity can't be maintained by protecting a few species in a zoo, or by preserving greenbelts or national parks. To function properly, nature needs more room than that. It can maintain itself, however, without human expense, without zookeepers, park rangers, foresters or gene banks. All it needs is to be left alone.