People may compete for the social benefit of a burnished reputation, which may cause competitive altruism.
pˈiːpəl mˈeɪ kəmpˈiːt fɚðə sˈoʊʃəl bˈɛnɪfˌɪt əvə bˈɜːnɪʃt ɹˌɛpjuːtˈeɪʃən, wˌɪtʃ mˈeɪ kˈɔːz kəmpˈɛɾᵻtˌɪv ˈɔːltɹuːˌɪzəm.