What happens when everything you have based your life dependence on has failed? You know how many people can't function without their smartphone, GPS, computer, or any other technological marvel we've created? Don't get me wrong, I love all those things, but just because they make our lives better doesn't mean they are a necessity, nor does it mean the people who don't want to use them on the same level as people who are not sane.
You'll understand when you're in the military and don't have a GPS to find your way around, but you've spent your whole life relying on it to find where you are.
Here's how "insane" people find where they're at
http://rotc.iweb.bsu.edu/IMG_7154.JPG