ValnaoLife expectancy in U.S. States and Select Countries
Japan, Australia, Korea, all have more homogenous societies, so their malign actors have less success turning citizens against each other to benefit themselves in doing things like cheating them on healthcare.
In the US, and other large countries generally, the disparate groups are played off of each other, and otherized, and they will get a large share of the population to support hurting, cheating, those others.
Counterpoint, Hawaii is a huge melting pot but has the highest life expectancy among US states. Australia also has many immigrants. People are not turning against each other.
But Hawaii has a large percentage of Japanese and Asian descendants. So to me we need to separate the data by ethnicity. DNA, culture, and food preferences has a high impact.