One planet, one experiment.

Competing is intense among humans, and within a group, selfish individuals always win. But in contests between groups, groups of altruists always beat groups of selfish individuals.

Thirty trillion dollars worth of services, scot-free to humanity, every year.

If enough species are extinguished, will the ecosystems collapse, and will the extinction of most other species follow soon afterward? The only answer anyone can give is: possibly. By the time we find out, however, it might be too late. One planet, one experiment.

Once I feel I'm right, I have enjoyed provoking.

We ought to recognize that religious strife is not the consequence of differences among people. It's about conflicts between creation stories.

I've found that good dialogue tells you not only what people are saying or how they're communicating but it tells you a great deal - by dialect and tone, content and circumstance - about the quality of the character.