Feudalism: A socio-economic system prevalent in medieval Europe where power and land ownership were decentralized, with lords granting land (fiefs) to vassals in exchange for military service.
Bureaucracy: A complex administrative system composed of non-elected officials who manage various aspects of governance. Bureaucracies play a crucial role in maintaining power structures.
Hierarchy: A ranking system that establishes different levels of authority or importance within an organization or society. Hierarchy helps maintain order and stability by clearly defining roles and responsibilities.