Narrow, self-serving groups had an inherent, though not insuperable, advantage over broad ones that worry about the well-being of society as a whole.

• 范围狭窄的自利性集团比起那些关心整个社会福祉的广泛性集团有着得天独厚的优势，尽管这种“非自利不能行”的弊端并不是不能克服的。