In evolutionary psychology this term may be applied to a wide range of human behaviors such as charity, emergency aid, help to coalition partners, tipping, courtship gifts, production of public goods, and environmentalism.
ɪn ˌɛvəlˈuːʃənˌɛɹi saɪkˈɑːlədʒi ðɪs tˈɜːm mˈeɪ biː ɐplˈaɪd tʊ ɐ wˈaɪd ɹˈeɪndʒ ʌv hjˈuːmən bᵻhˈeɪvjɚz sˈʌtʃ ɐz tʃˈæɹᵻɾi, ɪmˈɜːdʒənsi ˈeɪd, hˈɛlp tə kˌoʊəlˈɪʃən pˈɑːɹtnɚz, tˈɪpɪŋ, kˈoːɹtʃɪp ɡˈɪfts, pɹədˈʌkʃən ʌv pˈʌblɪk ɡˈʊdz, ænd ɛnvˌaɪɹənmˈɛntəlˌɪzəm.