Some of the most unexpected findings of the HPI concern the marked differences between nations, and the similarities among some groups of nations:
Island nations score well above average in the Index: They have higher life satisfaction, higher life expectancy and marginally lower Footprints than other states. Yet incomes (by GDP per capita) are roughly equal to the world average. Even within regions, islands do well. Malta tops the Western world with Cyprus in seventh place (out of 24); the top five HPI nations in Africa are all islands; as well as two of the top four in Asia. Perhaps a more acute awareness of environmental limits has sometimes helped their societies to bond better and to adapt to get more from less. Combined with the enhanced well-being that stems from close contact with nature, the world as a whole stands to learn much from the experience of islands.
It is possible to live long, happy lives with a much smaller environmental impact: For example, in the United States and Germany people’s sense of life satisfaction is almost identical and life expectancy is broadly similar. Yet Germany’s Ecological Ecological footprint is only about half that of the USA. This means that Germany is around twice as efficient as the USA at generating happy long lives based on the resources that they consumeEcological Ecological footprint is only about half that of the USA. This means that Germany is around twice as efficient as the USA at generating happy long lives based on the resources that they consume.

