Friedrich Engels, considered to be one of the principal founders of Marxism, criticised anarchism's anti-authoritarianism as inherently counter-revolutionary because in his view a revolution is by itself authoritarian.
fɹˈiːdɹɪtʃ ˈɛndʒəlz, kənsˈɪdɚd təbi wˈʌn ʌvðə pɹˈɪnsɪpəl fˈaʊndɚz ʌv mˈɑːɹksɪzəm, kɹˈɪɾɪsˌaɪzd ˈænɚkˌɪzəmz ˈæntaɪˌɔːθoːɹɪtˈɛɹiənˌɪzəm æz ɪnhˈiəɹəntli kˈaʊntɚɹˌɛvəlˈuːʃənˌɛɹi bɪkˈʌz ɪn hɪz vjˈuː ɐ ɹˌɛvəlˈuːʃən ɪz baɪ ɪtsˈɛlf ˌɔːθoːɹɪtˈɛɹiən.