dˈʊɹɹɪŋ ðɪs tˈaɪm sˈɜːpə bɪkˌeɪm ˈɪntɹɛstᵻd ɪn pˈɑːlətˌɪks ænd bɪɡˈæn pɑːɹtˈɪsᵻpˌeɪɾɪŋ ˈæktɪvli ɪnðə lˈɪbɚɹəl ɹˌɛvəlˈuːʃənˌɛɹi mˈuːvmənt ˌɛmˌɑːɹɹˈɛl æz mˈɛmbɚɹ ʌvðə jˈuːθs, ðɪs mˈuːvmənt hɐdbɪn fˈaʊndᵻd baɪ ɐlfˈɑːnsoʊ lˈoʊpɛz mˈɪtʃɛlsən.
During this time Serpa became interested in politics and began participating actively in the Liberal Revolutionary Movement (MRL) as member of the youths, this movement had been founded by Alfonso López Michelsen.