We got used to think that we live in the protected world. Warm apartment, electric light, foods from a shop is all reliable and it will be at any terms. However actually our comfort world is very unsteady. We constantly see that then in one, then in other part of the world people have одномоментно to lose all comforts of modern civilization. Reason can be war, natural calamity, assassination on an object as though to the nuclear power plant. It is impossible to eliminate possibility of pandemic of new disease, collapse from the crash of the financial system, change of climate or falling of asteroid (that not once radically changed life on our planet for her history).A book will teach you, how exactly to survive in the changing world.