Religion Is a Virus

Why God is a product of natural selection

The following interview is excerpted from a conversation between Mother Jones contributing writer Michael Krasny and Richard Dawkins, the Charles Simonyi Chair for the Public Understanding of Science at Oxford University and author of The Selfish Gene, River Out of Eden, and Climbing Mount Improbable. The interview took place on March 17, 1997, at San Francisco's Herbst Theater at a California Academy of Sciences benefit.

Q: You're known for your atheism and your comment that "religion is a virus." Are you more tolerant toward religion these days?

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A: No. I am often asked to explain as a biologist why religion has such a hold. The theory is this: When a child is young, for good Darwinian reasons, it would be valuable if the child believed everything it's told. A child needs to learn a language, it needs to learn the social customs of its people, it needs to learn all sorts of rules -- like don't put your finger in the fire, and don't pick up snakes, and don't eat red berries. There are lots of things that for good survival reasons a child needs to learn.

So it's understandable that Darwinian natural selection would have built into the child's brain the rule of thumb, "Be fantastically gullible; believe everything you're told by your elders and betters."

That's a good rule, and it works. But any rule that says "Believe everything you're told" is automatically going to be vulnerable to parasitization. Computers, for example, are vulnerable to parasitization because they believe all they're told. If you tell them in the right programming language, they'll do it. Computer viruses work by somebody writing a program that says, "Duplicate me and, while you're at it, erase this entire disk."

My point is that the survival mechanism that makes children's brains believe what they're told -- for good reason -- is automatically vulnerable to parasitic codes such as "You must believe in the great juju in the sky," or "You must kneel down and face east and pray five times a day." These codes are then passed down through generations. And there's no obvious reason why it should stop.

There's an additional factor in the virus theory, which is that those viruses that are good at surviving will be the ones that are more likely to survive. So, if the virus says, "If you don't believe in this you will go to hell when you die," that's a pretty potent threat, especially to a child. Or, if it says, "When you become a little bit older you will meet people who will tell you the opposite of this, and they will have remarkably plausible arguments and they'll have lots of what they'll call evidence on their side and you'll be really tempted to believe it, but the more tempted you are, the more that's just Satan getting at you." This is exactly what many creationists in this country have been primed with.

Q: You've said that when you discovered Darwin, everything fell into place. You felt a peace of mind. How was your atheism confirmed by Darwinism?

A: Before I discovered Darwin, I was fascinated by the apparent design and beauty of living things. I knew enough biology to know that living creatures are prodigiously complicated and elegant. They look exactly as though they'd been designed. That was why I believed in a divine creator. Because I had been so persuaded by this argument for design, when I discovered Darwinism, I had a kind of "road to Damascus" experience.

I think there is a serenity that comes from understanding, from being able to solve a mystery. And the bigger the mystery, the greater the serenity. When you think about the diversity, complexity, and beauty of life -- the elegance of the apparent design of life -- it adds up to a colossal mystery. And the solution, Darwin's solution, is quite remarkably simple. My serenity comes from the satisfaction of seeing a really, really neat, elegant explanation that can explain so much.