Don,
It seems to me that about 10 years ago, I saw a news show, regarding a "wonder" flour mix invented or used by Unicef or Feed the Children in Africa. It was a combination of several flours, wheat, soy, corn, and it may have even had powdered milk blended in. This mix, whatever it was, provided about 95% of what it took for people to stay healthy. It had a funny "acronym" name.
Any idea what this was?
Also, I saw a show about two months ago, about how a couple thousand African desert bushmen still live in the wild, more or less in the same manner as they have for thousands of years. They made their own small bows and arrows, and used a small insect or plant to produce a poison for the tips of their arrows, which they used for killing medium size game. The statement made on this show was that if a total shutdown of modern society ever occurred, then these few Bushmen would be the only people on the planet who would be basically unaffected and could continue to go on with life as they always had.
Regards, Mannyrock