(Laughter) The fourth explanation is captured in the title of a book called "The Expanding Circle," by the philosopher Peter Singer, who argues that evolution bequeathed humans with a sense of empathy, an ability to treat other peoples' interests as comparable to one's own. Unfortunately, by default we apply it only to a very narrow circle of friends and family.
(Smijeh) Četvrto objašnjenje izraženo je u naslovu knjige "Šireći krugovi" filozofa Petera Singera, koji tvrdi da je evolucija podala ljudima osjećaj empatije: sposobnost odnošenja prema tuđim interesima usporedivo kao s vlastitima. Nažalost, obično ga primjenjujemo samo na vrlo uski krug prijatelja i obitelji.