This has been particularly prominent in the United States, from Boas' arguments against 19th-century racial ideology, through Margaret Mead's advocacy for gender equality and sexual liberation, to current criticisms of post-colonial oppression and promotion of multiculturalism.
ðɪs hˈæzbiːn pɚtˈɪkjʊlɚli pɹˈɑːmɪnənt ɪnðə juːnˈaɪɾᵻd stˈeɪts, fɹʌm bˈoʊəz ˈɑːɹɡjuːmənts ɐɡˈɛnst nˈaɪntiːnθsˈɛntʃɚɹi ɹˈeɪʃəl ˌaɪdɪˈɑːlədʒi, θɹuː mˈɑːɹɡɹət mˈiːdz ˈædvəkəsi fɔːɹ dʒˈɛndɚɹ iːkwˈɔlᵻɾi ænd sˈɛkʃuːəl lˌɪbɚɹˈeɪʃən, tə kˈɜːɹənt kɹˈɪɾɪsˌɪzəmz ʌv pˈoʊstkəlˈoʊnɪəl əpɹˈɛʃən ænd pɹəmˈoʊʃən ʌv mˌʌltɪkˈʌltʃɚɹəlˌɪzəm.