Nevertheless, such nuances were overlooked as public administration sought its identity during this period. Leonard D. White's Introduction to the Study of Public Administration of 1926, the first textbook devoted to the field, expressed the Progressive values of public administration at the time : Partisan politics should not intrude on administration is efficiency; and administration in general is capable of becoming a " value-free" science in its own right. These perspectives provided an intellectual base for public administration 's next paradigm,which rested on the idea that, just as there were principles of science, there were principlrs of administration.