It is not OK in this culture to talk to friends about causes you believe in, much less to ask them to join in. It's OK to blast perfect strangers with crass messages every hour of the day, but it's a tinge embarrassing, it brings up some shyness, it seems an intrusion, it risks rejection to share real heartfelt commitments. It's easier to share our cynicism with strangers than our dreams with friends.

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.

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.

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.

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?

The scarcest resource is not oil, metals, clean air, capital, labour, or technology. It is our willingness to listen to each other and learn from each other and to seek the truth rather than seek to be right

Any system, biological, economic, or social, that gets so encrusted that it cannot self-evolve, a system that systematically scorns experimentation and wipes out the raw material of innovation, is doomed over the long term on this highly variable planet.