The rulers of the classical era established BUREAUCRACIES, ELABROATE LEGAL SYSTEMS, and CENTRALIZED GOVERNMENT as administrative institutions.
It was a reasonable assumption during the classical era that public administration should be studied as a separate subject of study, apart from political science, management, or law.
The history of public administration is lengthy. Traditional public administration was not equipped to handle fresh challenges and was unable to adapt since it was created to administer a state in a steady and predictable manner in a largely static environment.
The Greeks and Egyptians structured public affairs by office in antiquity, and the chief officeholders were seen as being primarily in charge of dispensing justice, upholding law and order, and supplying plenty.
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