hiː ɪz pɹˈɪnsɪpəli nˈoʊn æz ɐn əpˈoʊnənt ʌv lˈiːɡəl pˈɑːzɪtˌɪvɪzəm, ænd fɔːɹ hˌævɪŋ ɹᵻmˈeɪnd æz ɐn ˈæktɪv skˈɑːlɚ dˈʊɹɹɪŋ ðə nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi z ɪn nˈɑːtsi dʒˈɜːməni hˌuː dɪdnˌɑːt spˈiːk ˈaʊt ɐɡˈɛnst ðə pɹɪvˈeɪlɪŋ ɡˈʌvɚnmənt ʌv ðæt tˈaɪm.
He is principally known as an opponent of legal positivism, and for having remained as an active scholar during the 1930s in Nazi Germany who did not speak out against the prevailing government of that time.