Given the enormous environmental and social challenges faced by our early twenty-first century global civilization, one of the questions I hear most frequently is, What can I do? People often expect me to talk about lifestyle changes, recycling newspapers, or changing light bulbs. These are essential, but they are not nearly enough. We now need to restructure the global economy, and quickly. It means becoming politically active, working for the needed changes. Saving civilization is not a spectator sport.

Inform yourself, read about the issues. If you want to know what happened to earlier civilizations that found themselves in environmental trouble, read Collapse by Jared Diamond or A Short History of Progress by Ronald Wright or The Collapse of Complex Societies by Joseph Tainter. My latest book, Plan B 4.0: Mobilizing to Save Civilization, can be downloaded free of charge from Earth Policy Institute’s (EPI’s) Web site, earthpolicy.org, along with complementary data sets and a slide show summary. If you find these materials useful in helping you think about what to do, share them with others.

Pick an issue that’s meaningful to you, such as tax restructuring, banning inefficient light bulbs, .