The emergence of Joe Biden as the unassailable front-runner in the Democratic Primary belies a contest that at various turns broke new ground. From its unprecedented field, larger and more representative than ever (save the brief participation of two billionaires), to the remarkable resuscitation of one moribund campaign, the departure from custom was clear. Nowhere was this more obvious than in policy, where the inclusion of senators, Elizabeth Warren and Bernie Sanders, dragged the conversation leftwards into distinctly uncharted territory. While all candidates acknowledged America’s extreme inequality and the need for better healthcare, social security, etc., divergence came in the prescribed means of redistribution, and unusually discussion extended beyond familiar calls to raise income tax for the rich. Most liberal of the proposals was a wealth tax: an annual tax on everything an individual owns. Its mere suggestion confirmed an improbable rise of a policy that until recently was dismissed as fringe and anti-aspirational.