Molded by internal conflicts and external pressures, social science gradually changed. In the 1890s economics was defined more narrowly around market concerns. Both reformers and students of social dynamics gravitated to the emerging discipline of sociology, while political science professionalized around the important new field of public administration. This division of social science into specialized disciplines was especially significant as progressivism opened paths to power and influence for social science experts.
Professionalization profoundly altered the role and contribution of social scientists in American life. Since the late nineteenth century, professionals have exerted increasing control over complex economic and social processes, often performing services that they themselves have helped to make essential. Furner here seeks to discover how emerging groups of American social scientists envisioned their role what rights and responsibilities they claimed how they hoped to perform a vital social function as they fulfilled their own ambitions, and what restraints they recognized.