  Nevertheless, as a result of Elster’s arguments, methodological individualism became synonymous in many quarters with the commitment to rational choice theory. Such an equation generally fails to distinguish what were for Weber two distinct methodological issues: the commitment to providing explanations at an action-theoretic level, and the specific model of rational action that one proposes to use at that level (i.e., the ideal type). There are multiple permutations. For instance, there is no reason that one cannot be a methodological individualist while choosing to employ Habermas’s theory of communicative action rather than rational choice theory as the model of rational action. In fact, this would make greater sense, since game theory, strictly construed, has never purported to offer a general theory of rational action. The Nash solution concept, which provides the standard definition of a game-theoretic equilibrium, specifically excluded all forms of communication between the players (and the solution does not work in cases where communication does intrude [Heath 2001]). Thus much of the furor over rational choice imperialism has been based upon a failure to appreciate the limitations of that model (in many cases both by its defenders and its critics).