Due to this difference in epistemology, the four sub-fields of anthropology have lacked cohesion over the last several decades.
dˈuː tə ðɪs dˈɪfɹəns ɪn ᵻpˌɪstɪmˈɑːlədʒi, ðə fˈoːɹ sˈʌbfˈiːldz ʌv ˌænθɹəpˈɑːlədʒi hæv lˈækt koʊhˈiːʒən ˌoʊvɚ ðə lˈæst sˈɛvɹəl dˈɛkeɪdz.