"Chief among the reasons for migration is environmental ... or no evidence of iron working in east and southern Africa before the arrival of the Bantu suggesting that new technology was spread ...

"Chief among the reasons for migration is environmental ... or no evidence of iron working in east and southern Africa before the arrival of the Bantu suggesting that new technology was spread ...

Bantu is the word widely used as a description of a body of people originally based in west or central Africa who, over the course of three thousand years, moved to populate east and southern regions.