I taught home schooling to my 2 children until the 9th grade. It was required reading by me that they read "Lucifers Hammer". The story is fictitious, but the concept was survival and just what one might expect from a complete natural or man made disaster, including the subsequents causes and affects of man. Since my family and I have lived remotely in Alaska for over 28 years with no other year round residents within 20 miles by boat, we have made some amazing and interesting discoveries. One is that no one is completely independent of society or products produced within a peaceful and regimented country. Keep a non perishable supply of food that lasts one at least a year in the pantry. You cannot have too many tools, especially hand types from drills, saws, to wrenches of every kind. Medicine stockpiled in original unbroken seals, especially anti bacterial like neosporin, iodine, and flu meds. A very healthy supply of reloading tools, equipment, powders, brass, primers and bullets, for all weapons stored in air tight containers. An overabundance of clothing including shoes and boots. A complete library of how things work, carpentry by hand books, a thorough knowledge of the flora and fauna in the surrounding area, net making techniques, and a complete knowledge of ropework. Mechanical books on the specific equipment you have available. All this takes a lot of time to learn and cannot be learned when disaster hits. You must think ahead and anticipate every probable and some possible scenarios to determine the best course of action, not reaction. No one is completely safe from every type of disaster and no provisions can be made to prevent one or live through it. Know which ones.