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.

An Armageddon is approaching at the beginning of the third millennium. But it is not the cosmic war and fiery collapse of mankind foretold in sacred scripture. It is the wreckage of the planet by an exuberantly plentiful and ingenious humanity.

Every ecosystem, even a small one, is sustainable because it has certain ensembles and conditions and influences that are unique to it. And the biological ensembles are almost certainly, even the most modest ones, in the thousands of species. We don't know what's involved in the models - not even the beginnings. And yet we're trying to make a sustainable world, which has to include the natural world. The human species is triumphant, but it's got to get a grip. It's got to come to understand what's happened, why we're this way and what we're doing.

Human beings function better if they are deceived by their genes into thinking that there is a disinterested objective morality binding upon them, which all should obey.

From the freedom to explore comes the joy of learning. From knowledge acquired by personal initiative arises the desire for more knowledge. And from mastery of the novel and beautiful world awaiting every child comes self-confidence.

The time has come to link ecology to economic and human development. When you have seen one ant, one bird, one tree, you have not seen them all. What is happening to the rain forests of Madagascar and Brazil will affect us all.

When you have seen one ant, one bird, one tree, you have not seen them all.