By its very nature, survival is a hands-on, Do-It-Yourself proposition. We evolved to improvise, adapt and overcome. We learn as we go, experimenting and tinkering, making many small mistakes along the way. The trick is to avoid the huge, life-ending mistakes and to learn from the small ones. As social animals, we benefit from cultural knowledge and pass it down from one generation to the next. Even as hunter-gatherers, the individual members of the tribe began to specialize. Some members hunted and defended the tribe, others tanned the hides, sewed the clothing and gathered wild edibles. Still others specialized in…

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