One difference between ants and humans is that while ants send their old women off to war, humans send their young men.

Every major religion today is a winner in the Darwinian struggle waged among cultures, and none ever flourished by tolerating its rivals.

Adults forget the depths of languor into which the adolescent mind decends with ease. They are prone to undervalue the mental growth that occurs during daydreaming and aimless wandering

Biological diversity is the key to the maintenance of the world as we know it... Eliminate one species, and another increases to take its place. Eliminate a great many species, and the local ecosystem starts to decay.

I think we will make it. Because one quality people have - certainly Americans have it - is that they can adapt when they see necessity staring them in the face. What to avoid is what someone once called the definition of hell: truth realized too late.

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.

I believe that traditional religious belief and scientific knowledge depict the universe in radically different ways. At the bedrock they are incompatible and mutually exclusive.