Why did the high priests of Amon gain political power in Thebes?

The high priests of Amon in Thebes gained significant political power through a combination of administrative control, economic influence, and the evolving religious landscape of the late New Kingdom.1

Key factors contributing to their rise included:

• Consolidation of Authority: During the Ramesside period, high-priestly families began to form, often holding multiple high-ranking positions. For example, the family of the high priest Ramessesnakht controlled not only the wealth of Amon but also state finances, royal lands, and tax collection.1
• Administrative and Military Roles: High priests often possessed military backgrounds and held secular titles, such as vizier or viceroy of Kush. Figures like Herihor effectively governed the Theban region, eventually depicting themselves with royal status alongside the reigning pharaoh.1
• Economic Influence: As the central government weakened and the empire shrank, the temple became the primary institution for society. The priests managed vast resources, and the temple’s wealth grew as it became the focal point for religious life, oracles, and economic stability.1
• Religious Shifts: A trend toward "overt religiosity" and fatalism led the population to look to the temple for guidance. The priests’ ability to interpret the will of the god through oracles gave them direct influence over both private and state affairs.1