Physical anthropologists throughout the first half of the 20th century viewed this relationship from a racial perspective; that is, from the assumption that typological human biological differences lead to cultural differences.
fˈɪzɪkəl ˌænθɹəpˈɑːlədʒˌɪsts θɹuːˈaʊt ðə fˈɜːst hˈæf ʌvðə twˈɛntiəθ sˈɛntʃɚɹi vjˈuːd ðɪs ɹᵻlˈeɪʃənʃˌɪp fɹʌm ɐ ɹˈeɪʃəl pɚspˈɛktɪv; ðæt ˈɪz, fɹʌmðɪ ɐsˈʌmpʃən ðæt tˌaɪpəlˈɑːdʒɪkəl hjˈuːmən bˌaɪəlˈɑːdʒɪkəl dˈɪfɹənsᵻz lˈiːd tə kˈʌltʃɚɹəl dˈɪfɹənsᵻz.