You would think that people who had experienced injustice would be loath to inflict it on others, and yet they do so with alacrity. The victims become the victimizers with a chilling righteousness. This is the nature of fanaticism, to attract and provoke extremes of behavior. And this is why fanatics are all the same, whatever specific form their fanaticism takes.

But now science is the belief system that is hundreds of years old. And, like the medieval system before it, science is starting not to fit the world any more. Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways — -air, and water, and land — -because of ungovernable science.

False fears are a plague, a modern plague!