This dissertation discusses the development of economic thought in American universities during the late nineteenth century. It examines the ways in which economists formulated their theory and their conception of the discipline in light of the intellectual and institutional ferment of that period. It focuses on Francis Bowen, Charles F. Dunbar, F. W. Taussig, J. Laurence Laughlin, William Graham Sumner, Arthur T. Hadley, Francis A. Walker, Richard T. Ely, Henry Carter Adams, Simon Patten, E. J. James and John Bates Clark. These men assumed a central role in the formation of departments of economics at major universities and in the professionalization of the discipline. Their ideas and their careers reflect the response of economics to the ...