And yet there is a sense in which preferences and beliefs belong to our ordinary world­ view, for we constantly use them (and related concepts, like ‘desire’) to explain our actions and those of fellow human beings. This idea is not new. A century ago economists like Ludwig von Mises noticed that the explanatory strategy of economics is on a par with ordinary explanations of human action. And the source of Donald Davidson’s famous qualms with decision theory in the 1960s was the latter’s continuity with folk psychology.2