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published 10/14/06

Review of The Demon-Haunted World: Science As a Candle in the Dark, a book by Carl Sagan

An engaging manifesto on the importance of clear thinking in a superstitious world

by Paul Ingraham, Vancouver, Canada BIO
Credentials & qualifications. I am a science journalist, and I was a massage therapist for ten years. I’m close to the end of a Health Sciences degree — 2 courses left! — and I am on the editorial team of Science-Based Medicine. I have spent many years studying therapy science, and my work is greatly enriched by thousands of conversations with readers and experts from around the world. I make a living from this website, selling some of my most detailed tutorials as ebooks. For more, see Who Am I to Say?

Carl Sagan and Ann Druyan. The Demon-Haunted World: Science as a candle in the dark. Random House, 1997.


This is a book about clear thinking.

Modern health care desperately needs clear thinking. Doctors rarely have the beside manner or the time to guide us anymore. So people are taking the pursuit of health science into their own hands, looking for answers in their hearts, in bookstores, and in the stories they hear.

This seeking is a healthy and necessary impulse. But one tragic consequence is that there is too much misinformation and non-medicine floating around out there — much more than there was fifty years ago, when most people didn’t presume to know much, and probably made fewer anecdotal claims about healing. There may even be more non-medicine today than there was at the turn of the (previous) century, in the golden age of the snake oil salesman.

There is too much misinformation and non-medicine floating around out there.

Carl Sagan’s Demon-Haunted World is a good place to learn how to ask the right questions. He paints a chilling picture of what our world has been, and might be again, without clear thinking. But while he challenges many cherished superstitions and sloppy patterns of thought — enough to push the buttons of most readers, because most of us fondly cling to several comforting beliefs without much reason — this is no dry skeptic, no irritating debunker. Sagan was constantly amazed by life and the universe, and it shows in all of his writing.

“There are wonders enough out there without inventing any,” he writes.

This treatise on critical thought is one of my all-time favourites, a book that makes ten others unnecessary, the kind of book that will change how you think forever.


Further Reading

If you found this book review interesting, you may also be interested in some other articles that I have written that from a critical thinking perspective:

The following websites have little to do with health care specifically, but are interesting and essential resources for anyone generally interested in skepticism and critical thought: