The predisposition to religious belief is an ineradicable part of human behavior. Mankind has produced 100,000 religions. It is an illusion to think that scientific humanism and learning will dispel religious belief. Men would rather...

People would rather believe than know.

Humanity is a biological species, living in a biological environment, because like all species, we are exquisitely adapted in everything: from our behavior, to our genetics, to our physiology, to that particular environment in which...

If all mankind were to disappear, the world would regenerate back to the rich state of equilibrium that existed ten thousand years ago. If insects were to vanish, the environment would collapse into chaos.

Would I be happy if I discovered that I could go to heaven forever? And the answer is no. Consider this argument. Think about what is forever. And think about the fact that the human...

The race is now on between the technoscientific and scientific forces that are destroying the living environment and those that can be harnessed to save it. . . . If the race is won, humanity...

Another principle that I believe can be justified by scientific evidence so far is that nobody is going to emigrate from this planet not ever….It will be far cheaper, and entail no risk to human...

Somewhere close I knew spear-nosed bats flew through the tree crowns in search of fruit, palm vipers coiled in ambush in the roots of orchids, jaguars walked the river’s edge; around them eight hundred species...

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

[Scientific humanism is] the only worldview compatible with science’s growing knowledge of the real world and the laws of nature.

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...

The best way to live in this real world is to free ourselves of demons and tribal gods.

Social intelligence was therefore always at a high premium. A sharp sense of empathy can make a huge difference, and with it in an ability to manipulate, to gain cooperation, and to deceive.

A wiser intelligence might now truthfully say of us at this point: here is a chimera, a new and very odd species come shambling into our universe, a mix of Stone Age emotion, medieval self-image,...

[S]elfish members win within groups, but groups of altruists best groups of selfish members. (63)

Human beings appear to be sufficiently selfish and calculating to be capable of indefinitely greater harmony and social homeostasis. This statement is not self-contradictory. True selfishness, if obedient to the other constraints of mammalian biology,...

If there is danger in the human trajectory, it is not so much in the survival of our own species as in the fulfillment of the ultimate irony of organic evolution: that in the instant...

We are a biological species arising from Earth’s biosphere as one adapted species among many; and however splendid our languages and cultures, however rich and subtle our minds, however vast our creative powers, the mental...

A lifetime can be spent in a Magellanic voyage around the trunk of a single tree.

You teach me, I forget. You show me, I remember. You involve me, I understand.

Real scientists do not take vacations. They take field trips…