"A man-made or natural global disaster could strand you for months, years or forever with no electricity, no water from the taps, no grocery stores, no city services and no government. Further, you'll be surrounded by countless others who didn't prepare — the very same people who mock survivalists by calling them paranoid pessimists and worse. But survivalists are the ultimate optimists. They believe that they will succeed - no matter what happens to the rest of the world — if only they can assemble the right supplies and learn the right survival techniques."
The book (recommended by Instapundit) is: "Long-Term Survival In The Coming Dark Age: Preparing to Live after Society Crumbles." I like that it's available in Kindle format. Gives me an idea for an update of that old "Twilight Zone" episode "Time Enough at Last." I'll blend in some elements from "The Shelter."
("Time Enough at Last" is the one where — after the nuclear holocaust — a man who wants to read breaks his glasses. "The Shelter" is the one where — as people think nuclear war is about to begin — one family has a bomb shelter and their neighbors don't and want in.)