Xin Qian

Most Sapiences bands lived on the road... They usually traveled back and forth across the same home territory, an area of between several dozen and many hundreds of square miles. ... Occasionally, bands wandered outside. Sixty miles every forty years

Most Sapiences bands lived on the road... They usually traveled back and forth across the same home territory, an area of between several dozen and many hundreds of square miles. ... Occasionally, bands wandered outside. Sixty miles every forty years, about 10,000 years to cover the distance from East Africa to China. --p47

The human collective knows far more today than did the ancient bands. But at the individual level, ancient foragers were the most knowledgeable and skillful people in history. --p49