In each separate section, we sought to identify some failings and shortcomings of the particular models being reviewed. At this point we think it important to review both the strengths and weaknesses of the whole literature, which in some sense is an evaluation of the economic or maximization model approach to the study of interest groups. Except for Olson's work, much of the rest of the literature we have reviewed has been considered in only a desultory fashion by political scientists.