Further cultural subdivisions according to tool types, such as Olduwan or Mousterian or Levalloisian help archaeologists and other anthropologists in understanding major trends in the human past.
fˈɜːðɚ kˈʌltʃɚɹəl sˌʌbdᵻvˈɪʒənz ɐkˈoːɹdɪŋ tə tˈuːl tˈaɪps, sˈʌtʃ ɐz ˈoʊlduːwən ɔːɹ maʊstˈɪɹiən ɔːɹ lˌɛvɐlˈɔɪʒən hˈɛlp ˌɑːɹkiːˈɑːlədʒˌɪsts ænd ˈʌðɚɹ ˌænθɹəpˈɑːlədʒˌɪsts ɪn ˌʌndɚstˈændɪŋ mˈeɪdʒɚ tɹˈɛndz ɪnðə hjˈuːmən pˈæst.