Theory

Galen's Expansion of the Four Temperaments Theory

The Greek physician Galen expanded upon Hippocrates' theory of the four temperaments. He proposed that imbalances in the four humors could explain not only personality differences but also various diseases. Galen's view, which posited that every individual displays one of the four primary temperaments, became a dominant theory in medicine and philosophy for over a millennium, lasting through the Middle Ages.

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Updated 2025-10-04

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