Dawkins did say it, and explains it . . .
"It is absolutely safe to say that if you meet somebody who claims not to believe in evolution, that person is ignorant, stupid or insane (or wicked, but I'd rather not consider that)." I first wrote that in a
book review in the New York Times in 1989, and it has been much quoted against me ever since, as evidence of my arrogance and intolerance. Of course it sounds arrogant, but undisguised clarity is easily mistaken for arrogance. Examine the statement carefully and it turns out to be moderate, almost self-evidently true.
By far the largest of the four categories is "ignorant," and ignorance is no crime (nor is it blissI forget who it was said, "If ignorance is bliss, how come there's so much misery about?"). Anybody who thinks Joe DiMaggio was a cricketer has to be ignorant, stupid, or insane (probably ignorant), and you wouldn't think me arrogant for saying so. It is not intolerant to remark that flat-earthers are ignorant, stupid, or (probably) insane. It's just true. The difference is that not many people think Joe DiMaggio was a cricketer, or that the Earth is flat, so it isn't worth calling attention to their ignorance. But, if polls are to be believed, 100 million U.S. citizens believe that humans and dinosaurs were created within the same week as each other, less than ten thousand years ago. This is more serious. People like this have the vote, and we have George W. Bush (with a little help from his friends in the Supreme Court) to prove it. They dominate school boards in some states. Their views flatly contradict the great corpus of the sciences, not just biology but physics, geology, astronomy, and many others. It is, of course, entirely legitimate to question conventional wisdom in fields that you have bothered to mug up first. That is what Einstein did, and Galileo, and Darwin. But our hundred million are another matter. They are contradictinginfluentially and powerfullyvast fields of learning in which their own knowledge and reading is indistinguishable from zero. My "arrogant and intolerant" statement turns out to be nothing but simple truth.
Not only is ignorance no crime, it is also, fortunately, remediable. In the same Times review, I went on to recount my experiences of going on radio phone-in talk shows around the United States. Opinion polls had led me to expect hostile cross-examination from creationist zealots. I encountered little of that kind. I got creationist opinions in plenty, but these were founded on honest ignorance, as was freely confessed. When I politely and patiently explained what Darwinism actually is, they listened not only with equal politeness, but with interest and even enthusiasm. "Gee, that's real neat, I never heard that before! Wow!" These people were not stupid (or insane, or wicked). They didn't believe in evolution, but this was because nobody had ever told them what evolution is. And because plenty of people had told them (wrongly, according to educated theologians) that evolution is against their cherished religion.
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