Final answer:
Writing has facilitated the management of tax revenue and law promulgation in centralized political systems, serving as a crucial tool for administration and communication.
Step-by-step explanation:
Writing has played two pivotal roles in the administration of centralized political authority. First, it enables the efficient management of tax revenue by maintaining precise and transparent records, ensuring stable economic functioning of the state. Second, writing serves as a key medium for law promulgation and enforcement, setting clear regulations for society and helping maintain order. Historical records from agricultural states like Egypt and Persia highlight the extensive use of writing for administrative purposes, from celebrating monarchs' conquests to meticulous tax collection and legal record-keeping. Additionally, written texts allow for effective communication across a large society unlike oral traditions, which are typically found in smaller, non-agrarian communities.