Watch this:

http://www.pbs.org/now/shows/516/index.html

From the Huffington Post: The plain fact of the matter is there are about 4 billion people too many on this planet. Unless we control our population and reduce our consumption of resources down to that level voluntarily, the Earth will shortly do it for us.

Given the choice between doing something meaningful and not doing anything, most people will continue to do meaningless things like turning off their lights for a day and recycling aluminum cans while having 3-4 children and driving them around in an SUV to get their Big Macs and shop at the mall for more cheap consumer goods manufactured in China and shipped to the US.

As long as that's the paradigm, better build your bunker and stockpile food. Maybe you'll be one of the lucky ones to ride out the shitstorm.