People who harbor strong convictions without evidence belong at the margins of our societies, not in our halls of power. The only thing we should respect in a person’s faith is his desire for a better life in this world; we need never have respected his certainty that one awaits him in the next.

It is time we realize that belief is not a private matter. As a man believes, so he will act. Believe that you are a member of a chosen people, awash in the salacious exports of an evil culture that is turning your children away from God, believe that you will be rewarded with an eternity of unimaginable delights by dealing death to these infidels—and flying a plane into a building is only a matter of being asked to do it.

Human experience depends on everything that can influence states of the human brain, ranging from changes in our genome to changes in the global economy.

Some propositions are so dangerous that it may even be ethical to kill people for believing them.

Unreason is now ascendant in the United States - in our schools, in our courts, and in each branch of the federal government. Only 28 percent of Americans believe in evolution; 68 percent believe in Satan. Ignorance in this degree, concentrated in both the head and belly of a lumbering superpower, is now a problem for the entire world.

A person who believes that Elvis is still alive is very unlikely to get promoted to a position of great power and responsibility in our society. Neither will a person who believes that the holocaust was a hoax. But people who believe equally irrational things about God and the bible are now running our country. This is genuinely terrifying.

I am one of the few people I know of who has argued in print that torture may be an ethical necessity in our war on terror.