This year Abundance went from a bestselling book to a political practice powering Democrats from New York to Seattle.

This story was supported by a grant from Arnold Ventures. Vox had full discretion over the content of this reporting.

This episode was produced by Miles Bryan, edited by Amina Al-Sadi, fact-checked by Laura Bullard, engineered by David Tatasciore and Patrick Boyd, and hosted by Astead Herndon.

Suburban houses in Elmont, New York. Photo by John Keating/Newsday RM via Getty Images.

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