"The book spells out the great human achievements that have been brought about by humans who hunt and gather - across the millennia.
This also has to do with the fact that their mode of living.
Barnard points out that there is a lot to be learned for our own lives when getting to know a life based on hunting and gathering.
They depend on particular ways of understanding the human environment and the world at large.
It also shows that these achievements go beyond hunting and gathering alone. "The book spells out the great human achievements that have been brought about by humans who hunt and gather - across the millennia