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David Katz, M.D.

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Overpopulation: 9 Billion Things to Talk About

Posted: 09/01/10 08:00 AM ET

Any gardener knows that to solve a weedy problem, you have to get it at its roots.

We in Preventive Medicine know that, too, or certainly should. Our eyes were opened to this enlightened thinking by McGinnis and Foege in 1993. They were the first to note explicitly that the causes of chronic disease and premature death are not diseases, but the things that cause the diseases! Such as tobacco use, eating badly and lack of physical activity.

The evidence that they were right has only accumulated ... and accumulated since. I routinely invoke this literature to note that feet, forks and fingers are the master levers of medical destiny, as regular visitors here well know.

Viewed differently, bad use of feet, forks and fingers are the major causes of chronic disease. But these are the proximal causes, not the root causes. The root cause is modern living. Everything about modern living that makes it modern -- processed food, suburban sprawl, labor-saving technology, mass media marketing -- is obesigenic, and conducive to the insalubrious application of feet and forks. More on that, however, can be a topic for another day.

For today, how about those eggs? Why is it that some 500,000,000 eggs have been recalled in the U.S. due to salmonella contamination? Proximal causes have much to do with modern farming and food handling techniques, and something to do with FDA resource limitations. But what about the root cause?

And how about the drought in Russia, leading to massive crop failure? Inundation in Pakistan leading to massive displacement of the population? Flooding in China? And while we're at it, accelerated melting of the polar ice, with ramifications we are still just guessing at?

The root cause that connects these dots -- and many others besides -- is global population growth. There are too many of us.

This particular topic has something of a wince factor for me -- father of five! But former drug users often make the best addiction counselors and some of the top obesity experts struggle with their own weight. I suppose I can come clean about population pressures despite having done such a poor job of keeping my own genes to myself!

I raise the issue because it's ominously absent from almost all discussion of global warming and climate change, modern industrial agricultural practices, and the propagation and transmission of both infectious and chronic disease. This is odd, and worrisome. It suggests either obliviousness, fatalism or capitulation -- and none of these is good!

I was quite stunned when I spoke last year at the Imagine Solutions Conference in Naples, FL, that my fellow speakers addressing the trials and tribulations of the world spoke about a rapid ascent toward a global population of 9 billion or more as a fait accompli. Even though it was the driving force behind the problem they went on to discuss -- depleting of the oceans, climate change, deforestation, etc. -- it was not discussed as a problem in its own right. I had a similar impression when last I participated in the Aspen Ideas Festival.

If the harms of excessive global population have become a taboo topic, I didn't get the memo.

There are more than six billion of us here now. I am inclined to think there is no problem nine billion could solve that six-plus billion can't. However, nine billion may be the problem that the six-plus billion need to solve, if we are to solve any other. Because the growing horde of us consuming the resources of the planet in uniquely modern fashion is the problem underlying many other problems.

I could spell out how this root connects to the branches that populate our daily dose of bad news, but I suspect you can do that just as well yourself. For now, I am just saying we should all be thinking about it. And talking about it. And willing to say 'condom' in polite company -- and more importantly, in public policy.

The massive demands and ramifications of an ever-more-massive human population may be the root of the roots of many of our most urgent crises. It is something we can address by means at our disposal, but only if we are cognizant of it, and willing to talk about it.

So blame the eggs if you are so inclined. Or blame the chickens. But frankly, I think something else comes first. We have met the enemy, and in our ever-growing, voracious multitudes, it is us! We have nine billion -- or is it 12? -- things to start talking about, asap.

 

Follow David Katz, M.D. on Twitter: www.twitter.com/DrDavidKatz

Any gardener knows that to solve a weedy problem, you have to get it at its roots. We in Preventive Medicine know that, too, or certainly should. Our eyes were opened to this enlightened thinking by...
Any gardener knows that to solve a weedy problem, you have to get it at its roots. We in Preventive Medicine know that, too, or certainly should. Our eyes were opened to this enlightened thinking by...
 
 
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05:27 AM on 10/09/2010
In 99% of comments, articles or rants about overpopulation, people concentrate on how this whole issue will or will not affect humanity. Rare is the comment or mention of the effect human overpopulation has on all the other species on this planet. When people talk about overpopulation they worry about humans starving, suffering or loss of life. This arrogant, self-centered, ignorant attitude has started to annoy me more and more as of late.

Humans do not have a sacred right to the Earth. We don't own it, we just rent--like every other living thing that lives here. It is only in our own egocentric minds that we are both entitled and superior. In reality, we are not important. We do little good and lots of bad. Like parasites, we are sucking our host dry and leaving behind a landscape of ruin.

Even now as we debate, argue and delay, thousands of species of plants and animals are speeding toward extinction. As our population grows, theirs decline. What an ugly place this will be when they are all gone. I cringe at the thought.

But even with the knowledge of all this destruction and waste, what do people wring their hands about most when discussing overpopulation? Themselves.

People, people, people, not everything is about YOU. God, you are so selfish.

We are doomed.
07:33 AM on 10/09/2010
ive read that the vast majority of the damage is being done by a small amount of the people on this planet...that if america among others was more considerate in use of resources the current numbers would be sustainable
10:18 PM on 10/09/2010
It doesn't matter who is doing it now...because everyone wants to do it and they will--in the future.

But my irritation (in this instance) is with the attitude of people, not overpopulation itself. I am talking about perspective. How annoying it is that people think or worry about the ramifications of overpopulation only as they apply to humanity--meanwhile they discount or consider as merely a side effect all the calamity humans are doing to the rest of the inhabitants of this planet.
01:25 PM on 09/06/2010
I think you have hit the nail on the head when it comes to the discussion on overpopulation in environmental circles. Or rather, the near total lack of it. I think it's insane to talk about consumption of resources per head while not even mentioning the number of "heads".

A few more choice words on the matter:
http://rulehibernia.com/2010/09/saving-the-world-one-condom-at-a-time/
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ezeques
04:20 PM on 09/05/2010
I would do nothing. Nature will take care of itself and the population will reach its sustainable level.
07:58 PM on 09/06/2010
So it's better that people are born only to be killed off in a future population crash?
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ezeques
08:12 PM on 09/06/2010
No, its better we use lots of condoms. But that ain't happening.

Don't shoot the messenger. I'm just telling what's going to happen.
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ezeques
12:30 PM on 09/05/2010
If you really want to get thinking go to the thinktank Club of Rome: http://www.clubofrome.org/eng/home/ and check out what some of these scientists are saying. We have already overshot and the results may not be pretty.

The greatest population increases are in the dysfunctional 3rd world and that in itself will not end well. Africa, the worst, already has 1 billion and will double that in 12-14 years.
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ReasonableGuy
03:29 PM on 09/03/2010
In high school biology in 1968-69, I understood about the problems of overpopulation and decided that I would father only two children. I have fathered only two children. A few years after my daughter was born I had a vasectomy. Many other educated men that I know did likewise.

It has been incredibly obvious to anyone who has paid any attention to any of the world-scale problems over the past 40 years that over-population is the driving force for: pollution, resource scarcity, war, global-warming, etc.

If mankind cannot control its population voluntarily, then famine, disease, and war will ultimately do the job.

So which is it folks? Starvation, illness, war, or voluntary sterilization after two kids.

The rational choice is pretty clear.
08:30 PM on 09/03/2010
Fanned.
08:37 AM on 09/04/2010
Short and to the point. I like that!

I don't think you can over empathize the effect that population numbers have on pollution...etc.

Reducing population is the simplest and most effective ways of reducing these problems.
02:56 PM on 09/03/2010
Its ok to want to have kids- but if you can't please consider adoption before going for the fertility drugs!
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Noisyguy
02:14 PM on 09/03/2010
If entropy teaches us anything, it's that recycling can never completely halt the depletion of a resource. No amount of green living, or environmental conscientiousness, is ever going to cancel out the effects of overpopulation. Breeding is simply the quickest means to extinction.
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ezeques
12:36 PM on 09/03/2010
It may be that we are little more than rabbits with attitude.
11:39 AM on 09/03/2010
PLEASE STOP HAVING SO MANY KIDS!!!
09:31 PM on 09/02/2010
It's simple to understand that the world is limited in size with limited resources and that humanity will continue to increase its population until it exceeds the Earths ability to support life. Before mans learns it's lesson, we will endure world wide mass starvation, war, and pestilence. It's inevitable.
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Style Doggie 2
02:00 AM on 09/03/2010
Thank you Paul Ehrlich.
08:45 AM on 09/03/2010
I have no idea of what the limit is, but if we do nothing, the best case scenario is that there will be a certain percent of the population dying from starvation and a certain part that is malnourished. These percents will fluctuate according to the available food supply that is available at each moment. This condition could sustain itself indefinitely. This doesn't take into account the depletion of other resources necessary for life nor does it take pollution into consideration or natural catastrophes. .

Another force that might effect the rate of growth is the growing movement to have girl babies. If the population balance shifts to favor more women being born then it also sets the stage to increase the rate of child birth. Simple put, one woman / one hundred men = 1 baby ... one man / one hundred women = 100 babies. This is just a possibility. On the other hand, if this group of excess women chooses to not have children then they will die off and the population will readjust itself back to an equal number of men to women and for a while the population will reduce itself. Who knows?
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KtheCurious
08:50 PM on 09/02/2010
What a depressing article. We all know s%$t lies ahead, you don't need to make us feel worse than we already do.
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BillyClub
08:05 PM on 09/02/2010
Where are all these new babies going to live? Try the Vatican!
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angrymanspokane
Just a regular guy
07:25 PM on 09/02/2010
Insalubrious? Who else had to look this one up? Oh, just me, doh!
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WYHKTai-Tai
Wyoming, Hong Kong, Tai-Tai
08:28 PM on 09/02/2010
me too. Good for you, (us?) for expanding your vocabulary & bothering to look up words we don't know. :))
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Beth Boyle
06:42 PM on 09/02/2010
There are way too many people on the planet and I think we need to stop illegal immigration because the US has a lower birth rate yet we take all the people from other cultures who make zero effort to curb their over population problems. While educated people here are tying to have smaller families the non educated immigrants have huge families. It makes no sense to reward those who over populate the planet.
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sabelmouse
i love to tumble , ask me why .
11:34 AM on 09/04/2010
yet most us citizens use and consume more than 100 of those people. clean your own yard or whatever.
03:52 PM on 09/05/2010
Beth, half of people in the third world who want access to birth control cannot get it. Please find out more about these people who you assume are making "zero effort to curb their population problems." You might find that you should be helping them instead of fighting their efforts to immigrate.
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jinjinpinti
"I used to be disgusted, now I'm just amused."
05:07 PM on 09/02/2010
Was it George Carlin who predicted that when we get to the tipping point, "the Earth will shake us all off like a bad case of fleas." As long as we view every conception and birth as a little miracle we will continue down this road to "SRO."
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Beth Boyle
06:42 PM on 09/02/2010
He is so right.