There has been much research into happiness.
According to the 2013 World Happiness Report, Denmark is the happiest country in the world, followed by Norway, Switzerland, the Netherlands, and Sweden (Australia is 10th and the US is 17th).
Sponsored by the United Nations Sustainable Development Solutions Network, the global survey took place between 2010 and 2012 and ranked the happiness levels of people in 156 countries, using such criteria as wealth, health, freedom to make life choices, having someone to count on in times of trouble, freedom from corruption, and the generosity of fellow citizens.
According to the UN report, there are some common themes in the happiest places on Earth, including:
1. It (mostly) pays to be rich.
2. More money means more problems.
3. Being poor in Europe can be particularly rough.
4. Nice weather doesn’t correlate to happiness.
5. Happy people ride bicycles—by choice.
Learn more here.