How Rulers Were Chosen in European History

European history shows diverse methods of ruler selection, evolving across eras and regions:

1. Hereditary Succession: Most common—crown passed to eldest son (primogeniture) or nearest male relative (agnatic seniority).
2. Election by Nobles/Electors: Holy Roman Emperor chosen by prince-electors; Polish-Lithuanian kings elected by nobility (szlachta).
3. Popular Election / Assembly: Italian city-states (Venice, Florence), Dutch Republic—rulers chosen by councils or citizen bodies.
4. Conquest / Military Force: Power seized by invasion or coup (e.g., William the Conqueror, Napoleon).
5. Divine Right: Monarchs claimed authority from God, not subjects (medieval/early modern doctrine).
6. Coup d'État / Revolution: Overthrow of existing regime (e.g., 1688 Glorious Revolution, 1789 French Revolution).
7. Designation by Predecessor: Monarch names successor (e.g., Roman adoptive emperors, some early medieval kings).
8. Dynastic Marriage / Diplomacy: Unions merged claims (e.g., Habsburgs, Ferdinand & Isabella).

The method depended on historical context, power structures, and prevailing legitimacy norms.