He famously stated that "man is by nature a political animal" and argued that humanity's defining factor among others in the animal kingdom is its rationality.
hiː fˈeɪməsli stˈeɪɾᵻd ðˈæt "mˈæn ɪz baɪ nˈeɪtʃɚɹ ɐ pəlˈɪɾɪkəl ˈænɪməl" ænd ˈɑːɹɡjuːd ðæt hjuːmˈænᵻɾiz dᵻfˈaɪnɪŋ fˈæktɚɹ ɐmˌʌŋ ˈʌðɚz ɪnðɪ ˈænɪməl kˈɪŋdəm ɪz ɪts ɹˌæʃənˈælᵻɾi.