Average life expectancy:  81.7 years

Norway, which is home to some of the world's greatest explorers, is No. 4 in the world when it comes to people feeling content and satisfied, according to the World Happiness Index. The same analysis shows that there has been barely any change in happiness between 2005 and 2015. What locals appreciate the most is their freedom to live their lives as they wish without outside meddling. Social support is very strong in the country too.