Everyone stands and grabs his hunting bow. Onwas is an old man, perhaps over 60—years are not a unit of time he uses—but thin and fit in the Hadza way. He's maybe five feet tall. Across his ...

One of the last true hunter-gatherer tribes, the East African Hadza try to maintain their sustainable lifestyle. They have lived on their land near the Rift Valley in Tanzania for over 50,000 years.