Religion in each part world is heavily influenced by local culture and tradition so I think it is hard to say that a Catholic in the US has the same birth rate as a Catholic in Africa. Also, I doubt if ethics and morality really play that strong of a role. I am guessing that Americans are one of the most promiscuous groups in the world. Fortunately they are educated and practice birth control.
Period Total Catholic Non-Catholic Difference C-NC
1971-75 2.20 2.27 2.17 0.10
1966-70 2.78 3.21 2.62 0.59
1961-65 3.45 4.25 3.14 1.11
1956-60 3.57 4.24 3.36 0.88
1951-55 3.26 3.54 3.15 0.39
(per 1000) [1]
Catholicism does show an increased birthrate, although not so pronounced in the later years (I've no current data, I'd assume however that while catholic may show an increase over many other religions, the evangelical populous likely has shown a recent spike over both the catholic and non-catholic others with their "quiverfull" idealized large family units [2]
Looking at this from another angle, consider that the population growth in the US is ~1%. But even with a 1% growth rate, the US will double in population every 72 years. The population of the world is growing at about 1.15% per year, so the population of the world will double ever 62 years.
Valid, no comment.
Now I recall reading the news that the population of the world just turn past 7 billion people. How many people can the earth support until their not enough room/food/etc. to support the human population? Obviously, we are already seeing pockets of starvation in Sub-Saharan Africa. Plus we see the indirect effects of over-population in global warming and petroleum shortages.
The latter complaint, global warming/petrol shortages/etc. are valid concerns. However one must look at the reality behind famine. It has ALWAYS existed. We see it more due now to instantaneous communication even by the poorest of nations. Researchers are doing more work today identifying famine groups/geographies than ever in the past, so we're much more knowledgeable and concerned. While more people exist so the per capita statistics would speak for a larger number of people now than in earlier years, famine and hunger is not new to the world. We only see it so often now from the MSM/Adverts/web news sources/activists, that it appears to be an acute and recent development in its current form.
http://www.globalresearch.ca/index.php?context=va&aid=8846 said:
"Food prices in Haiti had risen on average by 40 percent in less than a year, with the cost of staples such as rice doubling.... In Bangladesh, [in late April 2008] some 20,000 textile workers took to the streets to denounce soaring food prices and demand higher wages. The price of rice in the country has doubled over the past year, threatening the workers, who earn a monthly salary of just $25, with hunger. In Egypt, protests by workers over food prices rocked the textile center of Mahalla al-Kobra, north of Cairo, for two days last week, with two people shot dead by security forces. Hundreds were arrested, and the government sent plainclothes police into the factories to force workers to work. Food prices in Egypt have risen by 40 percent in the past year... Earlier this month, in the Ivory Coast, thousands marched on the home of President Laurent Gbagbo, chanting “we are hungry” and “life is too expensive, you are going to kill us.[3]
There is much more going on in the world than simply a lack of food, there are unchecked free market snowballs, corruption, transport tarrifs by corrupt governments, lack of worker protections that maintain minimum wages that provide enough money for survival. Even when food is prevalent you have economic issues that are acute and sudden as well as long term and unhandled.
As the world increases to 10 billion people in 40 years and 14 billion people in 60 years, the prospects seem ominous but obvious. People are going to start to die at an ever faster rate due to starvation, wars waged to obtain the necessity of life, breakdown of health care... the list is endless. At some point the world population must fall to a level where human life is sustainable.
Having gone through a period where most of the world's resources have been ravaged by over population, the sustainable population will probably be much less than the existing 7 billion people. Forests will have been depleted, the ocean's fish stock severely reduced, soils eroded, groundwater polluted, etc.
This has also occurred through much of history, although on more localized occasions than world wide. Overfishing, not so much, but soil erosion has been a problem since the first human farmers planted their roots and cultivated the land. On the other hand, game was often decimated by local bands of hunter/farmers who didn't move about as the hunter gatherers did, this was often a problem in ancient civilizations. History does tend to repeat itself, although at this point with the intercommunication, wares transport, and resources distribution the scale is much much larger.[4]
China is the perfect example of what must be done to avoid the population bomb - autocratic measures must be imposed strictly limiting the population growth below 0%. Even with all the education about birth control and other medical techniques to lower population growth, the US is still keeping up with the world population growth. Ergo: education, birth control, knowledge, understanding etc. are not going to stop the population growth
I can see no other logical assumption except that a massive and painful number of people are gong to die. All the technological advances and all the educational techniques simply cannot support unlimited population growth. We must reduce the population growth to below 0%. Even China has a population growth rate of 0.65% despite their draconian efforts.
The only thing that will and ever has stopped population growth is the lack of localized (in this case earth, not a regional locale as in historical civilizations that collapsed) resources to maintain the consumption. I don't think out civilizations will collapse on a wide scale, some locations, here, there, it happens all the time, often due exactly to this. New will arise and with it more population will born only to fall and repeat. Once you reach a cap of sustainability death is inevitable for some. Is it right that they die? no, I dislike it, but it is as it is and there is a point in which nothing CAN be done. Education won't stop it, but it will slow it, so that the next natural culling of large numbers of people by famine and disease will arrive later than at our current rate. [5]
"People is a-gona die?" to quote Star Wars. Yup, and a whole lot of them, and certainly in the lifetime of my grandchildren. And they will look back and say, "Why did Obama spend so much money on health care just so that the we have more people could live longer and increase the population in the world?" Good question.
In the lifetime of your grandchildren? Not here in the US they won't. Why you may ask? Well, because those in the 3rd world are already doing exactly what you're assuming is future for us. I don't predict a famine in the US. We live in a lovely geography that spans many different climates all capable of different plants and food stuffs. If one area is effected, the others should be safe (as long as we don't screw up the environment too much) so food production loss isn't a problem. But what about meeting demands? More people, we need more food. Well, if something really horrible like that came around the bend, I think we have a lot more food than you think. We 'waste' tons of food stuffs on the production of non-nutritives, we do this using nutritive food items. I'm sure we could provide caloric sustainability for a good bit longer than you're assuming.
[1]
http://www.demogr.mpg.de/papers/working/wp-2006-013.pdf
[2]
http://www.theledger.com/article/20090718/COLUMNISTS/907185002?Title=More-Not-Always-Merrier &
http://www.quiverfull.com/
[3]
http://www.globalresearch.ca/index.php?context=va&aid=8846
[4] Guns, Germs & Steel : The Fates of Human Societies by Jared Diamond (1999)
[5] Collapse: How Societies Choose to Fail or Succeed by Jared Diamond (Dec 27, 2005)