It appears the United States isn't one of the top countries offering the best quality-of-life according to the Economist Intelligence Unit (EIU, a sister company of The Economist) which "earnestly" tried to figure out which country will provide "the best opportunities for a healthy, safe and prosperous life."
Switzerland and Australia got the number one and two spots. Here are a few of the factors that determined the standings:
Being rich helps more than anything else, but it is not all that counts; things like crime, trust in public institutions and the health of family life matter too. In all, the index takes 11 statistically significant indicators into account. They are a mixed bunch: some are fixed factors, such as geography; others change only very slowly over time (demography, many social and cultural characteristics); and some factors depend on policies and the state of the world economy. [...]
Small economies dominate the top ten.
Stability and trust are pluses, so "boring is best."
In 1988, the United States came in first, France second, and West Germany third. Iran, Iraq, and Zimbabwe were last.