In order to go about our 'normal' live we have to be able to ignore most of the bad things which might happen. Our collective psychology is fundamentally optimistic. Which is why we make progress and also why anyone studying history will easily see the huge mistakes we, as a species, make.
Many advanced civilisations have vanished and left big gaps in the history books. However collectively we continue because there's usually someone left to learn from the mistakes, and this will be no different.
Personally I am persuaded than by 2020 the world will be a substantially different place. As soon as a real oil supply squeeze starts -- which, barring round 2 of the ongoing financial collapse, could be any day now thanks to Chinese & Indian growth -- energy prices of all types will soar back towards the historically very high levels we've forgotten.
But while sustainable fusion will remain a scientific wet dream for the foreseeable future, the good news is that new fission reactors can be built in five years *if* our elected representatives (of all parties) grows some testicles. And although uranium supplies could be squeezed very heavily by an energy crunch (and the end of the programme to convert Cold War warheads to fuel), there's plenty of thorium to fall back on.
Renewables will be nigh on useless if we want to maintain anything like our current levels of energy use. I remember the power cuts in the 70s though, so I'm prepared for candle powered evenings and a lot of squinting at paperbacks if necessary. Fortunately this time I won't be doing my homework by candle light.
It would be nice if the current financial mess had been used as a good excuse to invest in a new wave of social housing to solve one human crisis, and energy supply to protect us from supply problems ahead. But now that eveything which matters has been privatised, only market forces (in this country) will be allowed to solve any of these issues.
Which is why I am psychologically prepared for energy bills tripling within perhaps five years. The markets will protect us from the end of modern civilisation, but they will wring every penny they can out of us in the process. Anyone fancy an Apple iFuser? Your very own 6V cold fusion energy source for only one million of your puny English pounds. Adaptor for charging your electric scooter will be extra. Proprietary lead to connect the adaptor will also be extra. Lead to connect your iPad will, however, be free.
Andrew McP... realist in most matters, but very socialist when it comes to fundamental necessities like energy and housing.