What distinguishing feature do the world’s healthiest and happiest societies have in common?

Respond to the following prompt (500 word count)

What distinguishing feature do the world’s healthiest and happiest societies have in common? Why does the U.S., (despite being one of the richest nations in the world), lag behind so many other rich Western societies in a number of crucial statistical measures – including life expectancy, violence, health, community, teen pregnancy, mental illness and incarceration.