Dream Hoarders: How the American Upper Middle Class Is Leaving Everyone Else in the Dust, Why That Is a Problem, and What to Do About It

America is becoming a class-based society.

It is now conventional wisdom to focus on the wealth of the top 1 percent—especially the top 0.01 percent—and how the ultra-rich are concentrating income and prosperity while incomes for most other Americans are stagnant. But the most important, consequential, and widening gap in American society is between the upper middle class and everyone else.

Reeves defines the upper middle class as those whose incomes are in the top 20 percent of American so...