The U.S.A. is second from the bottom with a more than eight times richer top 20% than the poorest 20%. Again, note the cluster of Scandinavian countries at the most equal top of the chart (the smallest income gap). Japan is the most equal in incomes, with a ratio of slightly more than three times greater incomes for their top 20%.

The quality of social relations is much lowered in high income inequality countries.