He concluded farming produced only about three-fifths of the food gained from foraging.
But, Bowles notes, farming became the most common way of living between 10,000 and 5,000 years ago because of its contribution to population growth and military power.
Without the need for constant movement, child-rearing would have been easier and safer, leading to a population increase, Bowles said. And since stored grain might be looted, farmer communities could have banded together for defense and would have eventually pushed out neighboring foragers, he suggests.
Story: Randolph E. Schmid, AP | Photo: Wikimedia Commons