Christopher Ehret, S.O. Y. Keita, and Paul Newman also argue that archaeology does not indicate a spread of migrating farmers into Africa, but rather a gradual incorporation of animal husbandry into indigenous foraging cultures.
kɹˈɪstəfɚɹ ˈeɪɹɪt, ˈɛs.ˈoʊ. wˈaɪ. kˈeɪɾə, ænd pˈɔːl nˈuːmən ˈɔːlsoʊ ˈɑːɹɡjuː ðæt ˌɑːɹkiːˈɑːlədʒi dʌznˌɑːt ˈɪndᵻkˌeɪt ɐ spɹˈɛd ʌv mˈaɪɡɹeɪɾɪŋ fˈɑːɹmɚz ˌɪntʊ ˈæfɹɪkə, bˌʌt ɹˈæðɚɹ ɐ ɡɹˈædʒuːəl ɪŋkˌoːɹpɚɹˈeɪʃən ʌv ˈænɪməl hˈʌsbəndɹi ˌɪntʊ ɪndˈɪdʒənəs fˈɔːɹɪdʒɪŋ kˈʌltʃɚz.