 The canonical theory of choice—Subjective Expected Utility (SEU)—owes its inception to the work of Savage (1954), building on previous contributions by De Finetti (1937), Ramsey (1931) and von Neumann and Morgenstern (1947). It offers a homogenous treatment of both decisions under “risk”—situations in which the decision maker has knowledge of, or holds firm beliefs regarding, the objective probabilities of all events pertinent to the success of his or her actions—and decisions under “uncertainty”—in which he or she does not. In its non-normative incarnation, it proposes at the very least that agents can be described as if: