Just a year ago, the argument for “universal basic income” (UBI) still seemed a fringe theory. It was the pet project of a coterie of libertarian academics and some left-wing activists, and the subject of an economic experiment among a small group of people in Finland. The idea that governments should cut a monthly check to every citizen was largely scoffed at by mainstream conservatives ideologically opposed to handouts (that is, at least, to average citizens) and rankled left-leaning intellectuals, who were wary of diverting resources from already cash-strapped, means-tested programs for the poor.