Carolingian Justice and the "Castle Shock" (9th century-ca. 1040)

To understand the “feudal mutation,” one must look at justice: who judges, in whose name, and with what means. Between the Carolingian inheritance and the castellanies of the 11th century, power changes less through decree than through concrete shifts in the places of authority.

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🧱 9th-10th Century: A Public and Hierarchical Justice

In the early Middle Ages, ties of loyalty already existed: a powerful man could grant a beneficium (often a piece of land) to a follower. But society remained marked by status:

• justice was first of all the affair of free men;
• the unfree were often punished bodily and defended by their master.

The king and the princes still used judicial tools to protect goods and rights. They could punish through the heriban (a fine for refusing military service) and through confiscations aimed at those who had offended them.

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🤝 Oaths, Homage, and Loyalties (ca. 900-1020)

The texts evoke gestures of loyalty:

• the osculum (kiss) is a sign of peace between kin groups or allies;
• homage (commandatio) is more humiliating and does not seem to have been systematic from counts toward the king.

Among the dependencies of humble people, loyalty could take a more “servile” form: the chevage (head tax or due) sometimes became a kind of “servile homage.” In some interpretations, this accompanied a movement of manumissions and a form of servitude less central than historians long believed.

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🏰 After 1020: Castellanies and the Privatisation of the Public

From the 920s onward, public authority became concentrated on strategic nodes such as roads, cities, and defensive sites. Overloaded counts delegated part of their functions to castle keepers, the castellani. These men dispensed justice:

• at the castle for the better-off;
• in local frameworks such as the vicaria or viguerie for humbler people.

Between 1020 and 1040, the proliferation of castra and mottes makes a shift visible: castellans appropriate public justice, make it hereditary, and turn their district into a space of seigneurial authority. Some historians call this the “castle shock.”

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🔺 A Social Pyramid Nearing Completion (ca. 1030)

Without freezing very diverse realities, one can see an emerging stacking of powers:

• the king (peace, war, arbitration of the kingdom);
• territorial princes and counts;
• castellans and lords (local ban, justice, fortress);
• knights (milites);
• tenants and dependants.

In the texts, the beneficium tends to become the fief (feodum), the allod grows rarer, and public powers tend to be privatised in the form of the bannum. This evolution is not uniform, but it explains why royal power under Robert II depends as much on alliances and strongpoints as on “law” in the abstract sense.

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🧠 Key Takeaways

• Justice is a revealing indicator: authority changes when the place of judgment changes.
• After 1020, castles and castellanies shift and privatise public functions.