One can list on the fingers of one hand the truly influential organizational scholars working prior to 1950. They include: Max Weber, Frederick Winslow Taylor, Henri Fayol, Elton Mayo, and Chester I Barnard. Of these, the two paying most attention to the sociological aspects of organizations were Weber and Barnard.

To the late Chester I. Barnard I owe a special debt: first, for his book, Functions of the Executive, which exerted a major influence on my thinking about administration. Secondly, for the extremely careful critical review he gave the preliminary version of this book; and finally for his Foreword to the first edition.