In ethics, Rand argued for rational and ethical egoism (rational self-interest), as the guiding moral principle.
ɪn ˈɛθɪks, ɹˈænd ˈɑːɹɡjuːd fɔːɹ ɹˈæʃənəl ænd ˈɛθɪkəl ˈiːɡoʊˌɪzəm ɹˈæʃənəl sˈɛlfˈɪntɹɛst, æz ðə ɡˈaɪdɪŋ mˈɔːɹəl pɹˈɪnsɪpəl.