Why did the Roman postal system disappear in western Europe?

The Roman postal system, known as the cursus publicus, did not vanish immediately following the fall of the Western Roman Empire in the 5th century. While some rulers, such as the Ostrogothic king Theodoric, initially maintained its essential functions, the system eventually disappeared due to several compounding factors.1

The primary causes for its decline included:

• Infrastructure Decay: The Roman roads, which were vital for the relay stages of the system, suffered from continued neglect and deterioration.1
• Economic Burden: Local communities bordering these routes became increasingly unwilling or unable to bear the significant expenses required to support and maintain the system.1
• Political Fragmentation: As Europe underwent progressive political fragmentation, the centralized organization necessary to operate a coherent, empire-wide communication network could no longer be sustained.1

While the cursus publicus persisted in various forms into the 9th century under the Carolingian Empire, these combined pressures eventually led to the total disappearance of the system in western Europe.1