sˈɪns mˈɔːɹɡən, ðə jˌʊɹɹəpˈiən θɹˈiːˈeɪdʒ sˈɪstəm hɐz pɹɪvˈeɪld ɪn ˌænθɹəpˈɑːlədʒi ænd ˌɑːɹkɪˈɑːlədʒi, bˌʌt ðɪ ˈeɪdʒ kˌæɹɪktɚɹˈɪstɪks hɐvbɪn ɛnlˈɑːɹdʒd tʊ ɪŋklˈuːd mˈɛnɪəv ðɪ ɐdˈɪʃənəl fˈæktɚz wˌɪtʃ mˈɔːɹɡən dᵻskɹˈaɪbd.
Since Morgan, the European three-age system has prevailed in anthropology and archeology, but the age characteristics have been enlarged to include many of the additional factors which Morgan described.