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.
사회가 부유해지고 더 잘 살게 되면서 사람들이 관심을 외부에 돌리고 자원봉사에서 자선 기부, 신장 기증까지 여러 이타적인 행동들이 증가하게 된다는 것이죠.