There is now a considerable body of literature which attempts to apply economic analysis to political problems. In my opinion, Olson's is one of the most successful and provocative of these attempts Olson's central insight is novel and illuminating to political scientists and he shows that by the use of it he can give familiar facts (about labor unions, farm organizations, and other interest groups) new meaning. I believe that his work is going to force the jettisoning of much of what has been said about interest groups and the revision of the rest. It should also have an influence on the many political scientists who work in the field of organization.
   --Edward C. Banfield, Henry Lee Shattuck Professor of Urban Government, Member of the Faculty of Public Administration, Harvard University