Customer Reviews

The Dragons of Eden: Speculations on the Evolution of Human Intelligence

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This book is a timely and fortunate publishing in these days of division on the evolution vs. creationism. Only one thing. It was written almost 30 years ago by uber-genius, Carl Sagan. And boy he really covers it all in this relatively small book on such a vast subject. He vulgarises well enough for the layman to understand, although it doesn't get informationally dense at times. What did you expect? It's Carl Sagan.

The book is pretty simple. It takes us through a speculative ride through the evolution of human intelligence. Carl Sagan once said that if you want to make apple pie from scratch, you must first create the universe. Thankfully he doesn't start there; he picks up around the time we were but mere bacteria and works from there. He goes through all levels of monkeys and then hominids always keeping in perspective that we aren't that far away from being just apes in trees. Just a few aborted mutations and we're still flinging crap at each other in trees.

Yes he vulgarises, but not as much as I. I just love to kid. On the contrary, Carl Sagan is a poet with a doctorate in biology. Who knew that cold science could inspire such warmth of creativity? He writes of humans carrying memory from our earlier times, swinging from tree branches. Here's what he said:

"And after we returned to the savannahs and abandoned the trees, did we long for those great graceful leaps and ecstatic moments of weightlessness in the shafts of sunlight of the forest roof?"

After reading this, I had a tear in my eye, because I remembered, I remembered being a child swinging from branch to branch in trees. Bending entire cedar trees to catch the next trunk, all this 20 or 30 feet up high. Was my compulsion for tree climbing simply buried genetic memory asserting itself? Who knows, but damn does swinging from trees beat having to wake up in the morning to go to work. The good old days.

He confidently links our technological leaps as being the obvious continuance of our ape heritage. As apes living up in the branches we had certain built in fears.

One of them was falling out of the branches and cracking ones skull open on the forest floor below. This fear is built in from birth. The baby ape knows innately that falling down is certain death. Sagan connects that to dreams we all have, dreams of falling. He posits that this dream we all have is vestigial of our times as tree dwellers. That somewhere inside us, the primal fear of falling out of the tree still lingers. That this dream is a built in security system to keep us from falling out of trees while we sleep, such as we did eons ago. This primal fear manifests itself in our technology. Notice in elevators (perhaps the modern ones don't hold true, but they did back 30 years ago) that the indicator for down is red and the indicator for up is green. Red, meaning death, green, meaning the canapé of leaves. Simple coincidence? I'd agree with Sagan in saying no.

The book goes on with many other affiliations between our ancestral beings and the intelligence we have today. He then ventures further with incorporating technology into our size challenged brain and then of course, Sagan being Sagan, further speculates about AI and extra-terrestrial intelligence.

What I enjoyed from this book, being an IT specialist, is his use of the computer intelligence model to compare with human intelligence. I myself often use this comparison model. This is a model I understand well and made me understand his scientific arguments with ease. He does this throughout the book but still keeps it at an understandable level. But his naiveté about his knowledge of computers would crush him by today's techno-mayhem slowly encapsulating us, but I digress. He would have adapted expertly to today's technology anyway.

He doesn't shy away from controversy either. He even takes on abortion by detailing how the human brain becomes human when the neo-cortex is formed because it's what differentiates us from other species. So he pretty much gives his opinion on when an embryo becomes human. And then dares you to say otherwise by upgrading simple animals to the same held ethical standards on life. Pretty spiffy work and enjoyable. I just love to see genius at work, even though he accuses anything outside the scientific method as "soft" science or pseudo-science, but then again a scientist always preaches to his choir.

I give this book a mind evolving 5 outta 5. It's a must read for anyone, for any reason. Read it, thank me later.

This book is one of the most enlighting books I have ever read. It should be required reading for every High School student. Just read this book!

Carl Sagan is a prodigious writer and I absolutely loved Cosmos. This was a bit of a departure for him, and was quite a bit more theoretical. There's a good reason that this is a 'classic', saved from mid-70s obscurity. It is still quite relevant today, especially considering his theoretical understanding of the evolution of the human brain. I'm not convinced (as he was) that religion is just a vestige of the pre-human ancestors. I think it's more likely the invention of homo sapiens; primitive, 0 AD humans, but humans nonetheless. Some of the sections of the book stand out as amazing, especially his investigations of the language learning abilities of primates.