Is there one major lesson for us here? A new survey of how satisfied people are with their lives reveals some fascinating social and geographical patterns.
Secrets of world’s happiest countries

Glossary
Arctic Circle - An imaginary line drawn around the most northern part of the world. It is one of the two very cold areas of the Earth near the poles.
World Happiness Report - An annual survey that ranks countries based on how happy their citizens report themselves to be, using data from the Gallup World Poll.
UN - United Nations. An intergovernmental organisation based in New York that aims to maintain international peace and security.
Nordic - Relating to Scandinavia (Norway, Sweden and Denmark), Finland and Iceland.
Progressive - In a political context, the belief that society can be transformed in the interests of ordinary people. It is normally associated with the politics of the left.