If our well-being depends upon the interaction between events in our brains and events in the world, and there are better and worse ways to secure it, then some cultures will tend to produce lives that are more worth living than others; some political persuasions will be more enlightened than others; and some world views will be mistaken in ways that cause needless human misery.

Ignorance in this degree, concentrated in both the head and belly of a lumbering superpower, is now a problem for the entire world.

All civilized nations must unite in condemnation of a theology that now threatens to destabilize much of the earth.

The moral truth here is obvious: anyone who feels that the interests of a blastocyst just might supersede the interests of a child with a spinal cord injury has had his moral sense blinded by religious metaphysics.

It is difficult to think of anything more important than providing the best education possible for our children. They will develop the next technologies, medical cures, and global industries, while mitigating their unintended effects, or they will fail to do these things and consign us all to oblivion.

Our moral reasoning is plagued by two illusions. The first illusion can be called the wag-the-dog illusion: We believe that our own moral judgment (the dog) is driven by our own moral reasoning (the tail). The second illusion can be called the wag-theother-dog's-tail illusion: In a moral argument, we expect the successful rebuttal of an opponent's arguments to change the opponent's mind. Such a belief is like thinking that forcing a dog's tail to wag by moving it with your hand will make the dog happy.

Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches.