Much as Cold War nuclear strategists could argue about winning a nuclear war by having more survivors, advocates of a Global Warming War might see the United States, Western Europe, or Russia as better able to ride out climate disruption and manipulation than, say, China or the countries of the Middle East.

In the U.S., we are free to speak our minds and to spend money without being forced to reveal our identities - except when using the Web. Browsing the Web leaves digital tracks everywhere in the form of log files, and anyone who hosts a Web site can be easily traced.

Futurism is almost like a vaccination. You inject a little bit of a denatured pathogen to prepare your body in case you encounter it for real.

To be clear, geoengineering won't solve global warming. It's not a 'techno-fix.' It would be enormously risky and almost certainly lead to troubling unforeseen consequences.

Sustainability is a seemingly laudable goal - it tells us we need to live within our means, whether economic, ecological, or political - but it's insufficient for uncertain times. How can we live within our means when those very means can change, swiftly and unexpectedly, beneath us?