It has been mentioned a number of times in this thread, that people are training to attain a level of knowledge, where they would be able to survive in the wilderness with only a knife.
And while it is entirely possible to live comfortably in the wild with only few tools, it is also inherently impractical in modern society.
For instance, even though I know enough plants to be able to gather enough to sustain myself in in the wild, this would require an enormous acreage to practise for even a slightly prolonged period. It is therefore not only impractical, but also ecologically irresponsible.
Modern farming, production and infrastructure has enabled humans to achieve vastly greater populations than would be possible with a hunter-gatherer lifestyle. With a paleolithic hunter-gatherer lifestyle the population of Denmark maxed out at about 500 persons - compare that to 5.3 million today!
The below table is calculated for an area with a diameter of 10 kilometers, equalling an area of 314 square kilometers:
(reference: F. A. Hassan, "Demographic Archeology", Academic Press, New York, 1981, p57)
Normally the population density for a hunter gatherer society is between 0,1 and 1 per square kilometer, with the highest value in areas around streams and rivers, where fishing can contribute to the food gathered from the forrest. (Reference: M. L. Bacci, "A concise history of world population", Wiley-Blackwell, 2001, p22)
To put into perspective, Denmark has a population density of 122,9 pr square kilometer and UK has a whopping population density of 243,3 pr square kilometer!
This makes it ecologically impossible to venture out in the wild and gather all your raw materials and food from the wild, even if you have the skills and knowledge to do so in a true wilderness environment.
When teaching courses I always introduce the students to the different kind of plants and their uses, but we never gather more than a few of each. While still making it possible for the students to sample the wild food, and gain experience in collecting and processing, it will at the same time minimise the ecologically impact, and thus enable me to use the same general area for other courses.
There are other places in the world where true wilderness living still is possible. Lynx Wilden is probably the foremost example on what can be done with modern knowledge, ecologically sound area management and paleolithic tools!
//Kim Horsevad