kəntˈɛmpɚɹˌɛɹi jˌʊɹɹəpˈiən sˈoʊʃəl θˈiəɹɪsts sˈʌtʃ ɐz kˈɑːɹl mˈɑːɹks ænd fɹˈiːdɹɪtʃ ˈɛndʒəlz wɜːɹ ˈɪnfluːənst baɪ mˈɔːɹɡənz wˈɜːk ˌɔn sˈoʊʃəl stɹˈʌktʃɚ ænd mətˈɪɹiəl kˈʌltʃɚ, æz ʃˈoʊn baɪ ˈɛndʒəlz ðɪ ˈɔːɹɪdʒˌɪn ʌvðə fˈæmɪli, pɹˈaɪvət pɹˈɑːpɚɾi, ænd ðə stˈeɪt wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd ˈeɪɾi fˈoːɹ.
Contemporary European social theorists such as Karl Marx and Friedrich Engels were influenced by Morgan's work on social structure and material culture, as shown by Engels' The Origin of the Family, Private Property, and the State (1884).