I have not read "Guns, Germs and Steel" but I have watched Jared Diamond on film and listened to him explaining his theory.

As I listened, I thought of the same questions as the author of this review. So, Africans failed to domesticate zebras because they kick a lot? And wild horses don't? The American and African buffalo are mean animals, whereas those of Eurasia stem from a docile predecessor who enjoyed the company of humans? Diamond does not understand (or pretends he does not understand) the first thing about domestication. It is not about identifying docile species. It is about identifying docile individuals within a species and having them mate in order to enhance their docility. This was proven in experiments with polar foxes in Russia. By the way, in that film, Diamond admits that lions and tigers were not domesticated not because they are so ferocious, but because they are useless. Talk about a scholar who never contradicts himself!

I sent Jared Diamond links to websites which feature stories and show pictures of Europeans riding zebras, and even ostriches, and asked him to comment. Naturally, he did not answer.

The most interesting thing, however, is that by the definition of those who refuse to accept the existence of genetic differences at the group level, Diamond is a self-avowed racist and a staunch supporter of J. P. Rushton, and R. Lynn. Not only has he stated that the New Guineans are probably more intelligent than Europeans for genetic reasons, but he has also published an article in Nature (1986, vol. 320, pp. 488-499), entitled "Variation in human testis size". If you had read that article without knowing the name of the author, you would have betted that it is by Rushton. In that article, Diamond concedes that East Asians have smaller testes than Danes, and that East Asians have the lowest twinning rates, followed by Europeans, then by Africans (which is the backbone of Rushton's theory). The only difference between him and Rushton is that Diamond says there is no evidence that these traits predict copulation frequency. However, he does concur with Rushton, that African (Yoruba) women have higher sex-hormone levels (at least at the time of ovulation) than Japanese women, and says that these differences may contribute to the geographic distribution of the incidence of breast cancer. And this is how Diamond ends his article: "...variation in human sex organs and function warrants serious study." So, Diamond supports Rushton's work! Surely, me must think that variation in human cranial capacity and correlations with IQ also warrant serious research! Who knows, it might turn out that New Guineans have larger brains than Europeans. That would explain their superior intelligence very convincingly. Everybody would be happy: Diamond, Rushton, Jensen, and Lynn!

- misho

- Mar-22-2007, 10:04

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I just happened to run across this review while googling, and I happen to agree with it. In fact, I would have been far more scathing in my review of it. While I generally agree with Mr. Diamond's thesis, his attempt to create a sort of environmental determinism in which things like random hapenstance and cultural/social decisions play absolutely no role in shaping society ultimately left me guffawing at his poltically correct silliness. I found it a shame that a man of Mr. Diamond's obvious intelligence couldn't address the subject dispassionately, because he really is making some important points.

In any event, I am primarily commenting because the other poster's first instinct was to shoot down your argument completely by means of an ad hominem attack. He says:

"Obviously the critical reviewer of Guns, Germs, and Steel has not carefully read this book."

To which he follows, "It is not a simple read. I had to read it twice to fully understand some of the points that he made. For instance, Dr. Diamond did not assert that the New Guinean people are more intelligent than the Western Europeans."

Now this is simply false, as the following passage makes abundently clear:

"My perspective on this controversy comes from 33 years of working with New Guineans in their own intact societies. From the very beginning of my work with New Guineans, they impressed me as being on the average more intelligent, more alert, more expressive, and more interested in things and people around them than the average European or American is. At some tasks that one might reasonably suppose to reflect aspects of brain function, such as the ability to form a mental map of unfamiliar surroundings, they appear considerably more adept than Westerners. Of course, New Guineans tend to perform poorly at tasks that Westerners have been trained to perform since childhood and that New Guineans have not. Hence when unschooled New Guineans from remote villages visit towns, they look stupid to Westerners. Conversely, I am constantly aware of how stupid I look to New Guineans when I'm with them in the jungle, displaying my incompetence at simple tasks (such as following a jungle trail or erecting a shelter) at which New Guineans have been trained since childhood and I have not.

It's easy to recognize two reasons why my impression that New Guineans are smarter than Westerners may be correct. First, Europeans have for thousands of years been living in densely populated societies with central governments, police, and judiciaries. In those societies, infectious epidemic diseases of dense populations (such as smallpox) were historically the major cause of death, while murders were relatively uncommon and a state of war was the exception rather than the rule. Most Europeans who escaped fatal infections also escaped other potential causes of death and proceeded to pass on their genes. Today, most live-born Western infants survive fatal infections as well and reproduce themselves, regardless of their intelligence and the genes they bear. In contrast, New Guineans have been living in societies where human numbers were too low for epidemic diseases of dense populations to evolve. Instead, traditional New Guineans suffered high mortality from murder, chronic tribal warfare, accidents, and problems in procuring food.

Intelligent people are likelier than less intelligent ones to escape those causes of high mortality in traditional New Guinea societies. However, the differential mortality from epidemic diseases in traditional European societies had little to do with intelligence, and instead involved genetic resistance dependent on details of body chemistry. For example, people with blood group B or O have a greater resistance to smallpox than do people with blood group A. That is, natural selection promoting genes for intelligence has probably been far more ruthless in New Guinea than in more densely populated, politically complex societies, where natural selection for body chemistry was instead more potent.

Besides this genetic reason, there is also a second reason why New Guineans may have come to be smarter than Westerners. Modern European and American children spend much of their time being passively entertained by television, radio, and movies. In the average American household, the TV set is on for seven hours per day. In contrast, traditional New Guinea children have virtually no such opportunities for passive entertainment and instead spend almost all of their waking hours actively doing something, such as talking or playing with other children or adults. Almost all studies of child development emphasize the role of childhood stimulation and activity in promoting mental development, and stress the irreversible mental stunting associated with reduced childhood stimulation. This effect surely contributes a non-genetic component to the superior average mental function displayed by New Guineans.

That is, in mental ability New Guineans are probably genetically superior to Westerners, and they surely are superior in escaping the devastating developmental disadvantages under which most children in industrialized societies now grow up. Certainly, there is no hint at all of any intellectual dissadvantage of New Guineans that could serve to answer Yali's question.

The same two genetic and childhood developmental factors are likely to distinguish not only New Guineans from Westerners, but also hunter-gatherers and other members of technologically primitive societies from members of technologically advanced societies in general. Thus, the usual racist assumption has to be turned on its head. Why is it that Europeans, despite their likely genetic disadvantage and (in modern times) their undoubted developmental disadvantage, ended up with much more of the cargo? Why did New Guineans wind up technologically primitive, despite what I believe to be their superior intelligence?"

In short, while it might be easier to defend that Mr. Diamond was only saying that it was impossible to see any intellectual differences between the peoples of the world, that is not in fact what he said. He said that in his travels he'd been convinced that he could see intellectual differences in people. Paraphrasing the above only slightly, he in fact says that it is his opinion that Europeans are geneticly inferior to other peoples of the world, having reached their current genetic makeup as a result of evolutionary pressures that selected against intelligence rather than for it. That is of course a much less defensible position, but it is in fact what he said. What I find completely courious, is that if he had said the opposite, that he could recognize differences in intelligence and in his opinion European and Euroasian peoples were probably more intelligent than other people as the result of evolutionairy pressures which selected in favor of intelligence - which he could have just as easily done using the same spurious and shallow reasoning as the above passage has - that his 'scholarship' would have been rejected out of hand and with much passionate chorus of disapproval and disgust. Instead, we see people leaping to his defense to the point of twisting his words and calling people poor readers if in fact they point out that he said exactly what he clearly said.

And then there is, "This fundamental lapse of understanding the book eliminates the need to address any other issues brought up in the review." Ah yes, if debate becomes difficult then you can just dismiss your opponent entirely on the grounds of his lack of understanding. Why not simply say that everyone that disagrees with you is stupid and be done with it, rather than hiding behind a veneer of graciousness while all the while calling into question your opponent's intelligence rather than actually trying to defend your thesis.

"It's an excellent book and I higly recommend it to anyone that is sincerely interested in why humans with identical genetic makeup..."

As a person working in genetics, I can tell you that the claim that humans have identical genetic makeup is fundementally untrue. I have databases of human genetic information to prove it. The claim that different human cultures are because of supposed genetic inferiority incapable of producing genius is likewise easily disprovable, but holding one absolute or the other as an unquestionable moral certainty is not science. Science does not presuppose the answer and then look for the facts to fit it while ignoring those facts that don't. Diamond's book provides valuable insight, but it falls well short of a full answer.

- celebrim

- Jun-03-2005, 23:54

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I wouldn't be at all surprised if you start to understand the book after your third read.

- oj

- May-20-2005, 10:43

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Obviously the critical reviewer of Guns, Germs, and Steel has not carefully read this book. It is not a simple read. I had to read it twice to fully understand some of the points that he made.

For instance, Dr. Diamond did not assert that the New Guinean people are more intelligent than the Western Europeans. His point was that he did not see any intellectual differences among people anywhere in the world (as a group rather than on an individual basis). He said one could argue that New Guinean people are more intelligent than Western Europeans by observing lifestyle just like you could make the arguement that Western Europeans are more intelligent than New Guineans. The arguments end up being an arbitrary matter of what evidence you choose to use to make your determination, in this case the ability of the New Guineans to survive in terrible and challenging conditions or the possessions or cargo of the Western Europeans.

This fundamental lapse of understanding the book eliminates the need to address any other issues brought up in the review. It is an example how a complex subject is hard to comprehend, so the reader simply identifies something that stood out as shocking and wrote an untrue and inflammatory statement about an intelligent and inquisitive man. Sounds like the sufferings of all scientists.

It's an excellent book and I higly recommend it to anyone that is sincerely interested in why humans with identical genetic makeup, would develop societies as such different rates.

- Darrell Kinsley

- May-20-2005, 10:07

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