Hiking equipment
According to Tom Brown, the basic plan for survival is in the order of shelter (including clothing), water, fire, and food. Cody Lundin writes about the "Rule of 3s"; this relates to human survival without basics: three minutes without air, three hours without shelter, three days without water, or three weeks without food.
Béla Bicsérdy
In the 1920s, Bicsérdy inspired a great many people in Transylvania and Hungary promoting a regime of a raw vegan diet (mostly fruits with some bread and raw milk), regular fasting, sunbathing, daily outdoor exercising and regular water-cure. He claimed that any person who followed his regime will be cured of illness and will live hundreds of years, just as known possible from ancient times (the Bible for example reported many long-lived people).