The "Suburbanization of Poverty" is a Decades-Long Trend

"Poverty is suburbanizing from the inside out rather than from the outside in, just as wealth and the upwardly mobile middle class did fifty years ago.

Although this implies that suburbia is unsustainable, the way it implies it is different from the usual explanation. It's not that the future is bad for low-density settlements and good for high-density ones. It's that the American urban form and political geography, especially but not only in the suburbs, are fundamentally unsustainable, and require constant growth to persist."