Nearly 60% of Americans identify themselves as middle class and nearly all the rest as working class. 3% call themselves upper class.
Compare to Unemployment by Race/Ethnicity and Gender, here.
Source: WSJ Oct 2017.
Children born in 1945 had a 90% chance of earning more than their parents. But only 50% of the children born in 1985 will earn more than their parents.
Most of the developed world has a larger middle class than the US.
Source: NYT 10/30/16.