The Decline of Human Intelligence

Dr. Gerald Crabtree, a geneticist at Stanford, has published a study that he conducted to try and identify the progression of modern man’s intelligence. As it turns out, however, Dr. Crabtree’s research led him to believe that the collective mind of mankind has been on more or a less a downhill trajectory for quite some time.

According to his research, published in two parts starting with last year’s ‘Our fragile intellect. Part I,’ Dr. Crabtree thinks unavoidable changes in the genetic make-up coupled with modern technological advances has left humans, well, kind of stupid. He has recently published his follow-up analysis, and in it explains that of the roughly 5,000 genes he considered the basis for human intelligence, a number of mutations over the years has forced modern man to be only a portion as bright as his ancestors.

“New developments in genetics, anthropology and neurobiology predict that a very large number of genes underlie our intellectual and emotional abilities, making these abilities genetically surprisingly fragile,” he writes in part one of his research. “Analysis of human mutation rates and the number of genes required for human intellectual and emotional fitness indicates that we are almost certainly losing these abilities,” he adds in his latest report.

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3 thoughts on “The Decline of Human Intelligence

  1. Human Intelligence Is Declining

    Been saying that since at least 1975. I approach this topic from a Young Earth Creationist point of view. According to Bishop Ussher’s calculations, humans (and the universe) were created around 4004 B.C. Adam and Eve were created perfect. A consequence of disobedience to God was not only banishment from the Garden of Eden but also a “curse.” Part of that curse was disease. Disease may cause harmful genetic mutations. Etc.

    I believe my early expression of this idea was: I believe in DEvolution. Humanity has been getting dumber and dumber since Adam and Eve. I’ve expanded it (jokingly) to the idea that the amount of intelligence in the world is fixed and that the population is expanding. Do the math.

    Many don’t believe in “coincidence.” I find it interesting that the two dates given by Crabtree in the article, 6,000 to 2,000 year ago*, are roughly the creation of man and the death of Jesus Christ.

    Be civil. These are just my thoughts and the comment section of a blog isn’t the place for the extensive presentation of evidence on a subject. Hope these thoughts at least provoke some in those who read them.



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