Tomorrow, the end of the world won’t happen. Even world economic collapse, or the total failure of the US government won’t happen without preliminary disruptions. Prepping now for that vague doomsday scenario is plain nuts. But regional natural disasters are almost a certainty. Prepping for survival of a large-scale hurricane, tornado, earthquake with a few days backup at home is a good idea. How do you prep? Most die-hard survivalists take the the “stockpile and defend” strategy, constructing doomsteads, which may or may not work in a natural disaster. Usually going with a “mobile and agile” strategy, with a ready “bug-out bag,” is better — but this is mostly a matter of temperament because we don’t have a lot of data of what actually worked in actual past disasters. (If you know of real data examining the value of home preparation please leave a link. Most of the evidence used in the survivalist prep world is Hollywood movies.)
But at the very least you should know what your survivalist options are. There are a zillion “prepper” books each one with more elaborate schemes and crazier than the one before it. Underground bunkers are only the tip. Selling doomsday (vs wilderness) survivalist advice is big cottage industry. I refuse to pay for this nonsense. The Survival Library is an open online archive of self-sufficiency, self-reliance instructions, PDFs, and videos that appear on other sites for free. It is easy to weed through. Some of the information, like welding instruction, or raising rabbits, or how to start a fire with no matches is useful whether or not you believe that the UN is sending black helicopters to take away your machine gun in the basement. The free downloadable PDF of the 500-page LDS (Mormon) Prep Manual is particularly interesting and for most normal people, all the prep literature you’ll ever need.