The economic organisatins of the bantu

Bantu peoples, the approximately 85 million speakers of the more than 500 distinct languages of the Bantu subgroup of the Niger-Congo language family, occupying almost the entire southern projection of the African continent. The classification is primarily linguistic, for the cultural patterns of Bantu speakers are extremely diverse; the linguistic connection, however, has given rise to considerable speculation concerning a possible common area of origin of the Bantu peoples

i think its the outcome of people's preferences.

this statement is   true