If you read a few survival guide "learns" that the priorities are: shelter, water, food (follow the other ...).
Sometimes this concept is expressed with the "law of three", ie you can not live if you're three minutes without air, three hours without adequate shelter, three days without water, three weeks (?) Without food.
This is a "law" very thumb, but that idea on the priorities in an emergency. The theory is very beautiful. But what does all this mean?
How do you shelter? How to light a fire without matches? How do you collect water? What do people eat? What do I need to "survive"?
The authors of those books would tell you to face the emergency is essential to have followed a survival kit containing materials that appear to be of aid in the management of these "crisis". But what is really needed?
At this point someone would let go long (or short) list of high-tech materials, able to satisfy all the needs of Maslow.
Others would tell you just two things: knowledge and brain .
Knowledge is not cluttered pockets, we carry with us always immaganizzata in the brain. The brain tells us what to do in different conditions, because one thing that few clearly say is that the big difference is the environment where one is. You can have hooks of all sizes in your kit, but if you're in the desert do you do? :-)
Adapting to the situation, improvise with what you have available and achieve the goal: to survive.
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