The UN just released its second World Happiness Report, which ranks countries according to happiness levels. Nordic countries are at the top this year, while the U.S., Egypt, & Greece are all more disgruntled than they were in years past. Economic output is a crude measure of national success. It accounts for negative transactions as much as positive things . Rich people do tend to be happier. But the same isn't true for countries: the U.S. has become richer without improving well-being overall.