Jeffrey D. Sachs, states that America's declining happiness is "a social crisis, not an economic crisis".
"By choosing to produce oil deliberately and investing the proceeds for the benefit of future generations, Norway has protected itself from the volatile ups and downs of many other oil-rich economies", said John Helliwell, one of the authors of the report.
The ranking took into consideration six variables: economic factors in the form of gross domestic product per capita, social support such as education and family life, healthy life expectancy, freedom to make life choices, generosity and perceptions of corruption.
Countries that achieved positive results have "high levels of mutual trust, shared goal, generosity and good governance", said Helliwell, a professor at the University of British Columbia.
In 2015, the map of the Geography of Happiness, was published and in that map the happiest countries in the world are shaded green, the unhappiest red.
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Norway was ranked fourth in last year's report. It's the same group that made up the top ten countries past year. Norway was fourth previous year, for example, but grabbed the top spot based on the six "key variables" used to explain happiness difference among countries and over time: income, healthy life expectance, having someone to rely on in times of trouble, generosity, freedom and trust.
"This report gives special attention to the social foundations of happiness for individuals and nations... this can be seen by comparing the life experiences between the top and bottom ten countries in this year's happiness rankings", the report said.
"The research reveals that happiness differs considerably across employment status, job type, and industry sectors". Work is also a major factor affecting happiness, with unemployment causing a significiant fall in happiness, and even for those in employment the quality of work can cause major variations in happiness.
"Nowhere is physical illness a bigger source of misery than mental illness".
It has been revealed through the World Happiness Report 2017 released by a United Nations agency that a Pakistan citizen continues to be happier than an Indian. Since 2012, many governments and governmental organizations have made well-being or happiness a priority. It is an official United Nations day that recognizes the pursuit of happiness is a fundamental human goal and the need for a more inclusive, equitable and balanced approach to economic growth that promotes sustainable development, poverty eradication, happiness and the well-being of all peoples.