The happiest countries in the world are all in Northern Europe (Denmark, Norway, Finland, Netherlands). Their average life evaluation score is 7.6 on a 0-to-10 scale. The least happy countries are all poor countries in Sub-Saharan Africa (Togo, Benin, Central African Republic, Sierra Leone) with average life evaluation scores of 3.4. But it is not just wealth that makes people happy: Political freedom, strong social networks and an absence of corruption are together more important than income in explaining well-being differences between the top and bottom countries. At the individual level, good mental and physical health, someone to count on, job security and stable families are crucial.
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of the Earth Institute at Colombia University