ogists, anthropologists, and other experts that the hunter-gatherer stage dominated 99 percent of human existence on Earth. (Here???s an article by Peter Gray, Ph.D. about the richness of natural education in the hunter-gatherer era <a href="http://www.psychologytoday.com/blog/freedom-learn/200808/children-educate-themselves-iii-the-wisdom-hunter-gatherers)">http://www.psychologytoday.com/blog/freedom-learn/200808/children-educate-themselves-iii-the-wisdom-hunter-gatherers)</a> So yes, less than one percent.