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Is Mankind Getting Dumber? (article)
Institute for Creation Research ^ | May 2013 | Brian Thomas

Posted on 05/01/2013 12:06:27 PM PDT by fishtank

Is Mankind Getting Dumber? by Brian Thomas, M.S. *

Do today’s children have lower I.Q.’s than yesterday’s? Yes, according to measurements of intellectual and emotional strength gathered from different countries and contexts. The results show the same basic decline and resist the notion that public or other forms of education are to blame. Could the cause instead lie within?

Stanford University professor Gerald Crabtree thinks so. He published a pair of essays in the journal Trends in Genetics, citing new discoveries that show why the human intellect is “surprisingly fragile.”1 This biblical creation-friendly notion didn’t sit well with the authors of a rebuttal paper, who countered that the human intellect is “robust.”2 What lies at the heart of this disagreement—bad science or bad assumptions?

Crabtree identified two fundamental processes as the main culprits. First, human intelligence uses neurons, and these cells can only function properly if their genes stay in top shape. Second, these genes are susceptible to degradation. This loss of organization occurs continually as mutations slowly, irreversibly garble genes, and the resulting errors pile up and are not corrected.

Our brains use 2,000 to 5,000 so-called Intellectual Deficiency (ID) genes, according to Crabtree’s estimate. Geneticists routinely identify specific mutations in ID genes as the causes of various types of mental retardation and similar intellectual syndromes that arise during imperfections in brain development.3 Proper human intelligence requires at least one clean copy of every ID gene.4 Like a missing wooden slat in a very long rope bridge, a mutant ID gene challenges the brain to carefully “step over” the gap on its way to developing the biological infrastructure for healthy intelligence.

Each new generation accrues about 60 new mutations to the gene-coding DNA regions of the human genome. Crabtree applied this rate to calculate that “every 20-50 generations we should sustain a mutation in one copy of one of our many ID genes.” As a result, “in the past 3000 years then (~120 generations), each of us should have accumulated at the very least 2.5-6 mutations in ID genes.” Accordingly, the human intellect “perhaps reached a peak 2000-6000 years ago.”1

This appears to confirm three lessons that can be drawn from the Bible. First, Adam and Eve’s brains were originally “very good.” Second, we had our best brains about 6,000 years ago. Third, humanity has suffered genetic degradation since then under the Curse.5,6

Some who wish to reject Scripture work hard to find ways to excuse Bible-confirming data from their own field of genetics. The authors of the technical rebuttal argued that Crabtree overestimated the true number of ID genes, but they did not offer data supporting an alternative number, nor did they explain why fewer ID genes should cancel Crabtree’s conclusion. The rebuttal team also rejected the idea that ID genes are susceptible to mutational buildup on the basis of “genetic theories regarding the evolutionary dynamics of deleterious mutations” and on the results of a computer model that illustrated how genes can increase in number assuming hypothetical evolution-friendly parameters.2

Both Crabtree and his detractors tried to extrapolate some set of numbers to make conclusions about the unobservable past. The rebuttal authors who resist the genetic-decay principle hand-picked numbers that support evolutionary history. Crabtree instead used numbers collected from real-world studies. And those studies present an ever-clearer case for a human race that was very good at the start, but is steadily falling apart.


Crabtree, G. R. 2013. Our Fragile Intellect. Part I. Trends in Genetics. 29 (1): 1-3.

Kalinka, A. T., I. Kelava, and E. Lewitus. 2013. Our Robust Intellect. Trends in Genetics. 29 (3): 125-127. One example is mental retardation caused by mutations in “Aristaless–related, homeobox” protein, expressed in developing nervous tissue. See Strømme, P. et al. 2002. Mutations in the human ortholog of Aristaless cause X-linked mental retardation and epilepsy. Nature Genetics. 30 (4): 441-445.

Generally, each parent supplies one copy of each gene, totaling two copies for each person. Brain cells that inherit one clean and one mutant copy of an ID gene often access the clean copy and sequester the mutated copy.

Tomkins, J. Genetics Research Confirms Biblical Timeline. Creation Science Update. Posted on icr. org January 9, 2013, accessed February 28, 2013.

Thomas, B. 2012. Human Mutation Clock Confirms Creation. Acts & Facts. 41 (11): 17.

* Mr. Thomas is Science Writer at the Institute for Creation Research.

Cite this article: Thomas, B. 2013. Is Mankind Getting Dumber? Acts & Facts. 42 (5): 17.

TOPICS: News/Current Events
KEYWORDS: areosalsprayingskys; cairmsm; creation; creationism; dumber; flouride; gmo; monsanto; theology; toxicvaccines
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1 posted on 05/01/2013 12:06:27 PM PDT by fishtank
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To: fishtank

That unpossible!

2 posted on 05/01/2013 12:07:22 PM PDT by nickcarraway
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To: fishtank; dfwgator; SunkenCiv

3 posted on 05/01/2013 12:08:23 PM PDT by Perdogg (Sen Ted Cruz, Sen Mike Lee, and Sen Rand Paul are my adoptive Senators)
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To: fishtank

Rather drastically conflicts with the extremely well-documented Flynn Effect, the cause of which is unknown.

4 posted on 05/01/2013 12:09:01 PM PDT by Sherman Logan
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To: Perdogg

President Dwayne Elizondo Mountain Dew Herbert Camacho!

Brawndo: It has what plants crave!

5 posted on 05/01/2013 12:09:48 PM PDT by rarestia (It's time to water the Tree of Liberty.)
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To: Perdogg

I was just going to say, “In Before the Idiocracy References.”

6 posted on 05/01/2013 12:10:16 PM PDT by dfwgator
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To: fishtank
Have some Brawndo and forget about it!
7 posted on 05/01/2013 12:10:24 PM PDT by Smedley (It's a sad day for American capitalism when a man can't fly a midget on a kite over Central Park)
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To: Sherman Logan

Looks like the smart ones are on welfare or working for the government..

8 posted on 05/01/2013 12:11:01 PM PDT by Hojczyk
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To: dfwgator

First 5 minutes of that movie are priceless.

9 posted on 05/01/2013 12:11:13 PM PDT by Truth is a Weapon (Truth, it hurts so good.)
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To: Smedley

10 posted on 05/01/2013 12:11:28 PM PDT by dfwgator
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To: fishtank

The very thing that makes us less brutal — the compassionate society — also removes the Survival of the Fittest genetic-enhancement method. This means that until we once again become savage. violent creatures, we will deteriorate as a species.

11 posted on 05/01/2013 12:14:14 PM PDT by Lazamataz ("AP" clearly stands for American Pravda. Our news media has become completely and proudly Soviet.)
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To: fishtank

Is mankind getting dumber? Considering this guy is the most powerful man in the world, by the free choice of enough living, non-fictional voters to put him within the margin of fraud, I'm not sure why anyone would be unsure. We're getting dumber very quickly. I hope and pray that we will learn from our terrible mistakes, but I don't see any positive signs.

12 posted on 05/01/2013 12:14:20 PM PDT by Pollster1 ("Shall not be infringed" is unambiguous.)
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To: fishtank

Is mankind getting dumber?

Let’s see. In 1984 the American people re-elected Ronald Reagan. In 2012 the American people re-elected Barack Obama.

I’d say that indicates a rather dramatic drop in intelligence in just over a quarter-century.

13 posted on 05/01/2013 12:17:05 PM PDT by No Truce With Kings (Ten years on FreeRepublic and counting.)
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To: Pollster1

Everyone at the White house is and they supposed to be edimucated.

14 posted on 05/01/2013 12:17:10 PM PDT by Conserev1 ("Still Clinging to my Bible and my Weapon")
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To: fishtank

About five years ago I came up with the hypothesis to explain the election of Obama... That the Earth had wandered into a zone of our galaxy that, due to some local magnetic/radiation anomaly, represses part of the electrical flow in the human brain. I dubbed it, The Stupid Zone.

Now I find out, I may have been at least partly right...

15 posted on 05/01/2013 12:22:02 PM PDT by Dead Corpse (I will not comply.)
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To: No Truce With Kings
look at the racial demographic change over the last 2 generations or so and you will find the real culprit. But no one is brave enough to state the truth.
16 posted on 05/01/2013 12:25:51 PM PDT by TexasFreeper2009 (Obama lied .. the economy died.)
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To: fishtank

I’m positive at least 47% are...IMO.

17 posted on 05/01/2013 12:26:34 PM PDT by areukiddingme1 (areukiddingme1 is a synonym for a Retired U.S. Navy Chief Petty Officer and tired of liberal BS.))
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To: Dead Corpse

” I dubbed it, The Stupid Zone.”’s not just the Republicans in the House & Senate anymore.

18 posted on 05/01/2013 12:27:38 PM PDT by stephenjohnbanker
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To: fishtank

Our first President was George Washington. Our current President is Barack Obama. You figure it out.

19 posted on 05/01/2013 12:28:29 PM PDT by ozzymandus
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To: TexasFreeper2009

It’s not about the race, it’s about the culture that race embraces.

20 posted on 05/01/2013 12:28:45 PM PDT by dfwgator
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