I find that most non-technical people have the most faith in technology saving us from ourselves in the future. Its always just over the horizon and will bail us out of the FF dilemma. Remember also that technology is what put us into this FF mess to begin with. At best they can extend the rosey era that we are in today, but I do not see alternative energy replacing the mountains of cheap FF energy that we have used during the industrial revolution to get us where we are today. Clean coal, clean(er) oil, solar, wind, hydro, nuclear, NG, better efficiency, etc. are good prospects. However, many of them still have the CO2 emissions issue somewhere in the process or development cycle, are limited, or actually depend on FF somewhere in production like ethanol, which in my view is a waste of oil in the long run, but politicians are demanding that we use more of it anyway. I believe that burning food is a bad idea, but burn it we will. That is leading to a new paradigm where energy = food & food = energy, as I have said above. Nuclear is the only real 'solution' longer term in my view, but it is very dangerous and proven unsafe in the cases of Fukushima, Chernobyl, and to a lesser degree at Three Mile Island. There is also the issue of peak fissile material; raw material to refine into fuel, and of course the issue of nuclear weapons that exist among the nations that have stockpiles, and that NK and Iran are developing.
I would not hang my hat on fusion, breeder/thorium reactors, or some other large scale process that has been touted for a long time. I have looked long and hard at both and they just do not pan out for a lot of reasons. I used to support Lawrence Livermore Lab as an applications engineer and discussed this stuff over many drinks with those guys. You can read many blogs on them by the IEEE, a professional group of electrical engineers that publish a lot of data and research. Perpetual motion does not work either, but I see a lot of ads for them on the internet. "What the electric company does not want you to know about" and that type of thing. Also as I have said before, its not just about peak energy. Its peak everything. There are limits to growth even with an unlimited amount of energy. We have been growing at an exponential rate as it is, which is the mathematical limit. I believe it is the nature of nature, and that we cannot help it. Like any organism given favorable conditions, we have outcompeted our competition and predators, overcome disease and famine, and bred like rabbits to reproduce like crazy. Now the issue is how to put the brakes on this process, or let nature take its path if we decide not to. We do have some brakes: war, poverty, genocide, murder, birth control, WMDs, etc. Add to that nature's brakes of disease, famine, and environmental/geological/cosmic disasters. In the end its a numbers game no matter what we do. So the equation becomes energy and resources and environment vs. human population and demand and ingenuity.
Everything in our civilization is based on growth. Growth growth growth. We do not do well in contractual periods. Systems fall apart and fail, civilizations collapse. Which is the premise of the PO concept. Its either grow, or face peril and demise. Its like Carnegie's statement on economics: you either grow or you contract; there is no leveling off. So rather than try to find technological solutions to feed the perpetual growth machine which simply has to fail at some point, or extend the process of growth by some synthetic means, I think it is more prudent to figure out how to dissolve our growth based capitalist systems and evolve a social process that allows for maintain a level, Earth carrying capacity population and work in harmony with the world that we have evolved on, rather than constantly **** it to death. Or at least try to. I seriously doubt that this will happen though, and it is a pipe dream of mine. I believe that we will simply peak and collapse, however fast or slow. I have been deeply involved in advanced technology development and energy systems as a professional engineer for over 25 years. I have invented and developed many systems for computers, military weapons platforms, and communications systems. I simply do not see a solution for endless human expansion that does not create more problems than it solves. We simply cannot expand forever. We either change and curb our rampantly growing population, resource appetite and environmental damage, or we eventually collapse as a civilization, and perhaps become extinct.