is a correspondent at Vox, where he covers the impacts of social and economic policies. He is the author of “Within Our Means,” a biweekly newsletter on ending poverty in America. Zohran Mamdani’s policy ideas might not always be the answer voters are looking for, but the dignity underlying his whole agenda is. Madison Swart/Hans Luca /AFP via Getty Images Last week, New York State Assembly member Zohran Mamdani sent shockwaves through the political establishment after he clinched the Democratic nomination for New York City mayor. Mamdani, a self-described democratic socialist, defeated a crowded field, which included former Gov. Andrew...