…is the subject of a recent article from FiveThirtyEight, which explains how the middle class has shrunk over the past 45 years and where those formerly in the middle class have gone (economically speaking). And where have they gone? More Americans are now either at the extremes of wealth or poverty than in the middle (defined as earning between 2/3 and twice the national median income) than at any time since 1971. The article also breaks down the shift in terms of demographics.
Here's the story.