For this I will need to take you through some simple thought experiments which will test just how much you might do for the sake of human continuity and just how far into the future you might project your own responsibility.
It is a truism that parents concern themselves with the well-being and happiness of their children and grandchildren (and great grandchildren if they live that long). So, a concern about the general state of human society will extend two or perhaps three generations into the future or roughly 50 to 75 years. After that, it's hard for us to put a lot of emotion into making things right for people we will never know.
But let's say you have an altruistic streak that transcends time. You actually believe that people you will never meet deserve your consideration now. You believe that you should leave them a society that makes a good life possible, however you conceive of that good life. How far into the future will this concern carry? 100 years? 1,000 years? 10,000 years? I sense your commitment fading the further out in time I go. After all, how can any of us possibly foresee what human life will be like in 10,000 years (assuming humans survive that long)? How can we even conceive of what a good life will look like then?
Now, let me throw a little cold water on your warm-blooded altruism. Let's say that today we as a global society decided to do everything we need to do to create what is roughly speaking a sustainable society. This would include ending our reliance on fossil fuels, adopting organic farming techniques, letting go of consumerism as an organizing principle, harvesting renewable resources only at the rate they can be renewed, gradually but drastically reducing population over time until it is below the Earth's carrying capacity for humans, and creating a cradle-to-cradle resource management system for all finite resources. Certainly, this list could be expanded. But the point is that the system we create could, in theory, be bequeathed to humans for as long as there is a planet Earth.
Now, what if at some point, say, 500 years into this grand experiment, a society arises that decides all these rules on what we can and cannot do should be repealed, especially the restriction on burning fossil fuels? So, today we make great sacrifices to move from a doomed society to one that is sustainable out of concern and respect for future generations. Then, some future generation blows it by undoing everything we've done. How's that for slap in the face? Except, of course, you won't be around to actually feel the slap. Still, this thought experiment forces us to confront a very ugly possibility and question how much we should sacrifice now for a potentially ungrateful and lethal generation in the future.
Now, let's go even further into the future. Let's say humans remain responsibly sustainable indefinitely. How long will that be? Well, the fossil record suggests that mammalian species such as humans have an average lifespan of 2 million years. So, if we date humans using the classification Homo sapiens, then we are a young species, perhaps 200,000 years old. If we date humans back to the beginning of the entire genus of hominids at least 4 million years ago, then humans are essentially in evolutionary overtime.
But no matter what time line you use, one thing remains true: The chances that we humans will defy the logic of the fossil record seem slim. Some 99 percent of all species that have ever existed on Earth have disappeared. We are very unlikely to evolve into some superior being that carries on the traditions and cultures of humans. We are much more likely to go extinct at some point no matter how sustainably we live as a species.
And finally, let's assume that somehow future humans evolve and adapt so well that they are alive billions of years from now. At some point, our Sun will expand as part of its death throes and consume the Earth. No more life at all on Earth at that point. (I know some of you are saying that perhaps humans will populate the stars. I see no realistic prospect that humans could actually do this even if they could find Earth-like planets. First, the distances would likely be so great that even highly advance spaceships would still take so long to reach such planets that the chance of survival would be small. Second, the Earth-like planet would almost certainly have micro-organisms that would kill humans almost as soon as they landed. Instead of the Andromeda strain coming to us, we would go to it.)
As I've lengthened the time line, no doubt you've found yourself wondering why any of us today should be concerned about the sustainability of human society in a future that is so vast that it is several orders of magnitude longer than human civilization has so far existed. Good question. The continuity of human beings simply cannot be guaranteed indefinitely into the future regardless of what our genes, our minds, or several hundred Star Trek episodes may tell us. We are largely powerless in that regard.
Now, I am not minimizing the impulse to make the world a sustainable place for our progeny. I recognize that as a very strong drive. And, it is one that is featured in countless environmentally-oriented appeals. But I am looking for bedrock here. Is there a way of thinking about sustainability that doesn't involve the inherently impossible task of seeking to assure human continuity indefinitely into the future? I think I have an answer.
Sustainable practices must be in and of themselves a path to a good life. If that's the case, then they are worth implementing simply because they lead to happier and more fulfilling lives. We can take a cue from the simplicity movement which embraced simple living as more fulfilling. Let me illustrate. I ride my bicycle for most of my errands and for exercise as well. Even if there were no climate change problem, even if there were no peak oil problem, even if there were no sustainability crisis, riding my bicycle would still enhance the quality of my life. I'm more fit. I'm more in touch with my physical surroundings. Typically, I'm still moving when traffic is halted. I can get closer to my destination. I pay no parking fees. I find myself now in a kind of universal brotherhood with every other cyclist on the road (a very underrated plus). I could go on. But I think it would be possible to say something similar about any practice that is truly sustainable.
I'm not suggesting that we give up on the rhetoric of creating a sustainable future for our children. But I am suggesting adding to that pitch that almost everything we call sustainable would make us happier even absent the problems we are trying to solve. That means people would ultimately have no regrets about adopting sustainable habits because, in general, they give us a fuller, more compelling life.
Kurt Cobb is the author of the peak-oil-themed thriller, Prelude, and a columnist for the Paris-based science news site Scitizen. His work has also been featured on Energy Bulletin, The Oil Drum, 321energy, Common Dreams, Le Monde Diplomatique, EV World, and many other sites. He maintains a blog called Resource Insights.
"the fossil record suggests that mammalian species such as humans have an average lifespan of 2 million years... If we date humans back to the beginning of the entire genus of hominids at least 4 million years ago, then humans are essentially in evolutionary overtime."
This is nonsense. It's suggesting that mammalian species all spring up out of nothing and then 2 million years later, die out. If this were the case, there would be no mammals on the Earth. The author seems to ignore the fact that mammals have been here for a hundred million years - that means that some mammal species have been successful for that long, evolving into different species as they needed to do so. Humans are the most successful of these. Our first direct mammalian ancestors were around a hundred million years ago; our first direct animal ancestors were around hundreds of millions of years before that. As a species, homo sapiens has had a short history, but the first homo sapiens did not spring up out of the ground, like magic: he or she had a mother and father who were a slightly different species.
On reflection I think this is a distraction, Kurt.
We are a long way from ceasing actively destructive practices - activities that we know are hurting ourselves now, today. Poisoning and pillaging the oceans. Poisoning the water, land, and air of South and East Asia. Encouraging the expansion of the Sahara into Europe and western Asia, and re-creating the great American desert. Destroying the Amazon and other rainforests. All of these things will have effects within the lifetimes of most people now living.
When we care enough about ourselves to change our ways, perhaps we can start to care about others as well. Until then, we should park your question in the "later" file.
Didn't we used to care about 10,000 years into the future. I distinctly remember as a child being very worried about humans 10,000 years from now stumbling on nuclear storage by accident and getting zapped.
It seems that between the nuclear winter scares of the 50s and 60s and the very bad news we got on the climate in the 80s and 90s resulting in an equally (or more) terrifying scenario, somehow, we stopped caring longer than "till 2100"
(I didn't though). It is very strange to me that no one seems to care past 2100.
"the distances would likely be so great that even highly advance spaceships would still take so long to reach such planets that the chance of survival would be small"
If you can build generation ships, why do you need planets at all? Building self-sustaining space habitats is almost certainly easier than colonising other planets.
Who cares about the future? Immediate and short term profit is today's religion, and surpasses cycling's or any other sustainable activity's supposed benefit and well being. As told by oters before me, money should be a servant and has become the master, the god, the only bright future. What when nothing will be left to buy on this planet? Who cares of such a (supposed) distant future? Is the human species superior to the other ones, and is it able to surpass his short term possession instincts? The answer is so clear! Short term and future are not conciliable, and short term wins. Sorry to be so pessimistic.
In the 1970s and 1980s we often spoke of the need to protect future generations. That terminology then mostly disappeared in the 1990s as it became more and more evident we are facing climate chaos within our own childrens' lifetimes. Then in the last decade, as extreme weather events dominated our news headlines it has dawned on us that we ourselves are in the firing line.
We can forget about altruism and future generations, if there isn't an impulse to act now to defend ourselves then the game is already over.
The problem is fuel, generation ships run out of it and need a planet to grab some more from. You can't sweep up enough from the low-density hydrogen in interstellar space, the drag caused by the sucking is enough to slow and stop the ship. So you need a planet now and then.
Just imagine yourself born 300 years earlier than you were, and sitting around the fire trying to predict the technology that we have now. Ludicrous. Next imagine you are now in 2012 trying to predict the technology that will be available in 2312. Ludicrous to state that starships will be impossible then. They might consider the problem trivial, and debate the relative worth of ten different types they currently use.
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