Which country uses Gross National Happiness (GNH) as a metric for prosperity?

The correct choice is Bhutan because it is the only country that officially employs Gross National Happiness (GNH) as a primary measure of national prosperity and progress, rather than solely focusing on economic indicators such as Gross Domestic Product (GDP). GNH was introduced by the Fourth King of Bhutan in the 1970s and reflects a holistic approach to development, prioritizing the well-being of citizens and the importance of a balanced application of economic, environmental, social, and cultural factors. This unique metric underscores the belief that true progress should encompass not just economic wealth but also psychological well-being, cultural preservation, and good governance, aligning development efforts with the values and aspirations of the Bhutanese people.

Other countries mentioned in the options do not have an official metric of GNH guiding their development policies, although they may have various welfare or happiness indices, but these do not serve as the principal guiding principle for the nation’s prosperity in the same comprehensive way that GNH does in Bhutan.