2008
The good news is that according to a new study by Inglehart, Foa, Peterson and Welzel (2008), happiness is actually increasing: in this longitudinal study between 1981 and 2007, happiness levels went up in 45 out of 52 countries. And contrary to what you might conclude from Myers’ graph, the US is one of those countries which shows an upward trend in happiness. … Happiness has risen, they suggest, due to increasing democratization over the past 25 years, which means that people increasingly feel they have free choice (e.g. freedom of speech, to travel and in politics) and control over their lives.