Why being rich doesn't alway mean being happy

"Some of the nation rankings are indeed surprising, at least if we assumed that money was the only type of wealth.... Why do some relatively rich nations such as South Korea do less well than expected? In part, because of the quality of social relationships."

– Ed Diener, researcher with the University of Illinois and the Gallup Organization, about a survey of 132 countries that asked people about their "overall life satisfaction."