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Ned Potter is the science correspondent for ABC's "World News with Charles Gibson." He has reported on such topics as space exploration, the human genome and climate change.

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'Western Man has Stopped Evolving'?

October 08, 2008 12:24 PM

Ascent_of_manphotodisc J. Steve Jones, a geneticist at University College London, has set off a bit of a brush fire by suggesting that human beings in technologically-advanced societies have stopped evolving, no longer faced with the challenges to their survival that made survival of the fittest so important to Darwin.

"In ancient times half our children would have died by the age of 20. Now, in the Western world, 98 per cent of them are surviving to 21," he said in a lecture in London. He elaborates on it in a piece he wrote for London's Telegraph; find it HERE.  He argues that we have benefited from modern medicine, agriculture, indoor plumbing, etc., making the notion of adapt-or-die less important than it used to be. 

He offers another theory, on which he hangs more of his argument: in addition to the comforts of modern times, more men are having children at younger ages, reducing the chance of random genetic mutations.  "Today's men start late, but stop early. In Cameroon, almost half the fathers are over 50, in Pakistan about a fifth, and in France only about one in twenty," he writes.  "Young dads mean that the rate of mutation is going down rather than up, and less, not more, of evolution's raw material is being made."

Jones, something of a media figure in Britain, has brought up this theme before, and certainly has his share of detractors -- take a look at a CRITIQUE by John Wilkins of the University of Queensland in Australia: "Once and for all: evolution has not stopped. Not now nor ever."

There are a lot of complex, sometimes self-contradictory arguments here, and the whole thing brings a lot of attention to its instigator in Britain.  But here in the U.S., at least, it's a bit less onerous than thinking about the economy. 

October 8, 2008 | Permalink | Share | User Comments (135)

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Jim Huneycutt - If by "missing" you mean "at your local library", then yes, the "facts" are still missing somewhere in that mysterious realm. Perhaps they're "missing" somewhere in the math and science section. I suggest you start your search there.

Posted by: wolf | Oct 8, 2008 2:40:56 PM

The increase in genetic mutations is increased by the soft life we ahve becuause people surive to breed who would have died young in a harsher world. So genes that would ahve died out naturally survive.
A more important evolution mechanism of our soft life is selective breeding. Beutiful people can find other beautiful people and athletes can find athletes. We will eventually evolve sub-species of models, actors, runners, swimmers, ball players, etc.

Posted by: GreggW | Oct 8, 2008 2:44:42 PM

Kind of funny that some people have trouble accepting evolution of species, even though there is plenty of evidence for it, and yet have little trouble accepting the existence of a god, for which there is not a shred of credible evidence.

Posted by: D.B. | Oct 8, 2008 2:50:51 PM

Yeah... those who dont support evoulution over the bible... are well... like in the dark ages: blind

While its not a perfect theory, its the best THEORY... meaning that its the best explanation to date, rather than Adam and Eve...

Posted by: Benjalamelami | Oct 8, 2008 2:55:52 PM

Prm, do you encounter terrorists on a daily basis? If so, how do you combat them? How often do they directly threaten your existence? Your argument is ridiculous.

Posted by: stryk55 | Oct 8, 2008 3:02:58 PM

Humans did not evolve from animals. We were made by God in his image read (Genesis in the Bible) and have a soul that lives for all of eternity. It would be impossible to evolve from animal to human and somehow "grow" a soul.

Posted by: Vicki | Oct 8, 2008 3:08:01 PM

Lemurs were different 50 million years ago than today. Monkeys were different 20 million years ago than they were today. They stll exist because they found a climate that they could do well in. Apes were different 10 million years ago too. The changes are due to their environment. Humans are different now than they were 800,000 years ago too for the same reason.

Posted by: Mark | Oct 8, 2008 3:12:20 PM

In the beginning God created...
The natural age of death is the same now as it was is the year 1500! Check the books and records, I did. Check Genesis Chapter 8, verse 22, and you will see that Global Warming is a manufactured crisis. The Educational crisis is manufactured (In this case they, Socialist, created it). Wake Up America! You have been dumbed down.

Posted by: Richard Cross | Oct 8, 2008 3:15:30 PM

I think humans will evolve - with all the electronics and communication through text messages, etc., I believe the next step in human evolution will be the loss of speech...

Posted by: rematenaj | Oct 8, 2008 3:19:25 PM

Jim Honeycutt, when was the last time you bothered to read a book on the subject of evolution? Or take a class? Have you EVER done it?

There are plenty of solid online sites that will answer your question. Just type in "evolution" and "evidence."

I agree with the poster who suggested that we are continuing to evolve mentally. New technologies require successful adaptation as much as physical environments do and will continue to do so. It may also be that humans are evolving in ways we cannot yet perceive in order to adapt to environmental changes and hazards, such as rising pollution levels. In the short term, these problems will have deleterious effects on many of us; but ultimately, nature may select for features that help some humans withstand those effects and pass on their genes.

Posted by: Eleonora27 | Oct 8, 2008 3:21:48 PM

The soft life we have today does not end evolution. It ends natrual selection, but there is still unnatural selection. People are able to find people to breed with who have the characterisics they want, so we are using selective breeding to make new sub-species (eventually).
You people who go to the bible for explanation of nature instead of science would be funny if you weren't so pathetic. You deny all the science that is inconvinient for your fantasy life.

Posted by: GreggW | Oct 8, 2008 3:25:10 PM

Note from Ned Potter--

Hello to Wolf (and all others who've posted comments). In your comment at 2:04 PM you raise a good point on which, in fact, Jones has been challenged. Human beings in the past had lower odds of surviving infectious diseases, getting nutrition, being safe from predators, and so forth -- but it was not impossible for people to live to advanced age. Jones argues that such elders would have been honored, and their offspring (with or without mutations) would have been welcomed. Jones' detractors say he's exaggerating the importance of this pattern.

Posted by: Ned Potter | Oct 8, 2008 3:27:02 PM

Kind of hard to end something that never happened.

Posted by: Lee | Oct 8, 2008 3:40:28 PM

Total BS. Humans will keep evolving. Maybe not physically since we don't need to survive in the jungle, but intellectually. Technological advances mean that humans need to constantly absorb more knowledge in each successive generation. Mental development also comes from better nutrition. We are in effect becoming smarter faster, although sometimes the opposite may seem true.

Posted by: jdoe | Oct 8, 2008 3:43:37 PM

Since evolution is a lie to start it is not possible to draw any reasonable conclusions based on it. Or, you can say anything you want about it, which will only be another lie. All things were made by the LORD God Almighty.

Posted by: Herman | Oct 8, 2008 3:44:06 PM

Evolution theory or what-have-you is a direct insult to my intelligence.

Posted by: Sonya | Oct 8, 2008 3:54:31 PM

earth humans were created by other alien humanoids from other worlds...2012 11:11..the return of our creators...evolution of humans is a myth

Posted by: joe from ne-philly | Oct 8, 2008 4:02:46 PM

Evolution is a lie. We were created by God alone.

Posted by: Greg | Oct 8, 2008 4:03:07 PM

The fact that the conscious soul inside the body and the temporary body itself are two different things suggest that bodily evolution is not that important, because all life here is destined to die, no matter how well it has evolved to survive! God set off the bang, and designed evolution just so we (the pure but fallen souls)can eventually come to the conclusion that a devotional service attitude combined with true spiritual knowledge is the ticket out of this temporary world. I'm going home, what about you?

Posted by: Gerald | Oct 8, 2008 4:05:53 PM

You know what? Who cares if someone believes in Evolution or not. If we continue to argue about it then what good is there to be done? Can't we all just accept that other people believe and don't believe the same things? No ones forcing anybody to accept evolution or religion here. Choose what you believe in and leave it at that. There is no purpose in arguing, there has never been a resolve.

Posted by: CommonSense | Oct 8, 2008 4:13:58 PM

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