by copious.abundance » Mon 06 Jul 2009, 22:14:35
$this->bbcode_second_pass_quote('Quinny', 'T')hat wasn't an answer.
It's you that doesn't get it!
OK, if you insist I'll help you out here.
Let's look at 3 possible population scenarios.
#1 I'll call the Malthusian scenario. In this one the doomer crowd eventually proves to be correct and we have a Malthusian population crash. In this graphic I randomly chose a peak population of 10 billion which would occur somewhere around 2070. However, the maximum population could be more or less, and the date of the peak could be earlier or later.

#2 I'll call the Techno-Cornucopia scenario. In this one us Cornucopians are correct, and technology unleashes vast amounts of resources (both physical and "intellectual"). I have once again randomly chosen a peak population of 20 billion which won't be arrived at until the year 2300. Also again, the timing and the size of the population could be different.

#3 I'll call Cyber World. This is a "Beyond Cornucopia" scenario. In this scenario we begin to merge with our cybernetic creations and, in many cases, become fully cybernetic beings. Beings such as this would not even need food/agriculture - the only sustenance they need is electricity. A world filled with sentient beings who only need electricity to survive can support a huge population of such creatures. So, I have randomly chosen a peak population of 100 billion which would occur perhaps in the year 10,000. But once again, these are just random choices for illustration.

Now, back to my other link with the metaphysical musing. In that little essay I said that humans were ultimately doomed. Notice that - even in my 2 Cornucopian scenarios above - I have also assumed the same thing. The curve of all 3 scenarios is the same, the only difference is the magnitude of the curve. Why did I assume this? Because, as I said in that other link,
nothing lasts forever. That is, nothing can be "sustained" forever - not that old-growth forest I put at the top of page 5, not the lake outside my window, not the ducks in the lake - nothing. Neither will human beings (or their cybernetic descendants, if they have any).
You don't get it because by telling me "human population growth is not sustainable!" I reply by saying, "So what? Nothing is sustainable. If there were something that was truly sustainable, it could last forever. Since there is nothing that can last forever, nothing is truly sustainable."
At which point I'm sure someone will start to quibble over definitions.
Sustainability$this->bbcode_second_pass_quote('', '[')b]1: capable of being sustained
2 a: of, relating to, or being a method of harvesting or using a resource so that the resource is not depleted or permanently damaged,
b: of or relating to a lifestyle involving the use of sustainable methods
Regarding definition #1, I maintain that human agriculture can be sustained for thousands of years. Oh wait - it already has been. I also maintain that human population growth can be sustained for hundreds, maybe thousands of years. Oh wait - it already has been. Will they go on forever? No. But, neither does anything else.
Regarding definition #2, we have soils in Asia and Europe which have been under non-stop cultivation for thousands of years. This being the case, it is clear to me it isn't being "depleted" or "permanently damaged." Will this go on forever? No. Oh well. As for "depletion," yes we do use resources which are being depleted. Can this go on forever? Obviously not. How long can it go on? Nobody knows. Once we do start to get them pretty well depleted, there is always the sun (and uranium and deuterium). Can
last forever? No, not even the sun will not last forever. So what? It will last so long, we essentially don't need to ever worry about "running out" of it.
Where doomers see an impending wall of limits due to reliance on fossil fuels which (they believe/hope) will start running out soon without viable alternatives, I see plentiful supplies of fossil fuels remaining which can keep us going for quite a long time, after which we can transition to solar, wind, nuclear and other more "sustainable" energy sources. This does not mean human civilization can go on forever (it won't) but it can last a really long time. I fail to understand why so many environmentalist types are so big on trying to make human civilization "sustainable." Do they really think human civilization can and/or should last forever? If they don't, why do they bother?