As societies become wealthier and better off, people seem to turn their focus of attention outward, and as a result, all kinds of altruism towards strangers increases, from volunteering to charitable donations and even altruistic kidney donations.
Kako društva postaju bogatija i boljeg standarda, čini se da ljudi okreću svoju pažnju prema vani, a rezultat je povećanje svih oblika altruizma prema strancima, od volontiranja do donacija, te čak i darivanja bubrega.