A democratic socialist—Bernie Sanders—is among the top contenders to be the next Democratic nominee for U.S. President. His rival and fellow Senator, Elizabeth Warren, is also among the top tier of candidates, declaring herself a capitalist who wishes to transform American capitalism as we know it, with a wealth tax, a Green New Deal and the elimination of private health insurance. A more centrist candidate, Mayor Pete Buttigieg of South Bend, Ind., illustrated the shifting winds when he recently declared that “neo-liberalism is the political–economic consensus that has governed the last 40 years of policy in the U.S. and U.K. Its failure helped to produce the Trump moment. Now we have to replace it with something better.” In 2016, the Democratic Socialists of America (DSA) had 5,000 members; since then, its dues-paying membership has multiplied more than tenfold.