But the entrepreneur in any of his or her roles as an innovator in the Schumpeterian sense, or as a coordinator/decision-maker vis-á-vis Knight’s concept or an arbitrageur according to Kirzner, cannot be explained by the model. And any attempt to integrate the entrepreneurial “human actions” into the theory leads only to complete rejection, given the opposite polarity of these postulates and actualities. The entrepreneur succeeds and creates an economy in an uncertain environment with indeterminate resources, hindered at every turn by outside factors and the vagaries of the market. She or he is the antithesis of the theory of the firm as it is presumed by current economic theory.