If we lose half the species, which could happen by the end of the century if we don't do anything, that's going to create a big difference down the line in the stability and even the economic potential in the living world. Irreversibly.

All my life I have placed great store in civility and good manners, practices I find scarce among the often hard-edged, badly socialized scientists with whom I associate. Tone of voice means a great deal to me in the course of debate. I despise the arrogance and doting self-regard so frequently found among the very bright.

While ants exist in just the right numbers for the rest of the living world, humans have become too numerous. If we were to vanish today, the land environment would return to the fertile balance that existed before the human population explosion. Only a dozen or so species, among which are the crab louse and a mite that lives in the oil glands of our foreheads, depend on us entirely. But if ants were to disappear, tens of thousands of other plants and animal species would perish also, simplifying and weakening land ecosystems almost everywhere.

That is the great mystery of human evolution: how to account for calculus and Mozart.

So, the ant way of life is very ancient and very successful. As far as human beings are concerned, we've been around for only one million years--too soon be sure.

No species ... possesses a purpose beyond the imperatives created by genetic history ... The human mind is a device for survival and reproduction, and reason is just one of its various techniques.

True character arises from a deeper well than religion.