A study published in the Journal of Cross-Cultural Psychology found that when you assign a simple problem to the Himba, the semi-nomadic people of Namibia, and to a group of Westerners, the Himba are more cognitively flexible. "They were better able to switch away from a learned rule and use a shortcut when the opportunity presented itself."

Article: Why The Semi-Nomadic Himba Are So Good At Thinking Outside The Box