“Historically, "public administration" has grown in large part out of the wider field of inquiry, "political science." The history of American political science during the past fifty years is a story much too lengthy to be told here, but some important general characteristics and tendencies it has communicated to or shared with public administration must be noted.
The Secular Spirit Despite: the fact that "political science" in such forms as moral philosophy and political economy had been taught in America long before the Civil War, the present curriculum, practically in its entirety, is the product of the secular, practical, empirical, and "scientific" tendencies of the past sixty or seventy years. American students dismayed at the inadequacies of the ethical approach in the Gilded Age, stimulated by their pilgrimage to German universities, and led by such figures as J. W. Burgess, E. J. James, A. B. Hart, A. L. Lowell, and F. J. Goodnow have sought to recreate political science as a true science. To this end they set about observing and analyzing "actual government." At various times and according to circumstances, they have turned to public law, foreign institutions, rural, municipal, state, and federal institutions, political parties, public opinion and pressures, and to the administrative process, in the search for the "stuff" of government. They have borrowed both ideas and examples from the natural sciences and the other social disciplines. Frequently they have been inspired by a belief that a Science of Politics will emerge when enough facts of the proper kinds are accumulated and put in the proper juxtaposition, a Science that will enable man to "predict and control" his political life. So far did they advance from the old belief that the problem of good government is the problem of moral men that they arrived at the opposite position: that morality is irrelevant, that proper institutions and expert personnel are determining.”

Source: The Administrative State, 1948, p. 22-23