Humorism
In the 6th century BC, Alcmaeon of Croton stood at the edge of a new medical understanding. He proposed that health depended on the balance of fluids within the body. Earlier traditions from Ancient Egypt and Mesopotamia hinted at similar ideas, but they lacked a systematic framework. Alcmaeon expanded this concept to include fundamental elements like water, earth, fire, and air. Hippocrates later refined these thoughts into a practical system for physicians. He identified four specific bodily fluids: blood, phlegm, yellow bile, and black bile. These substances were not merely physical; they dictated both physical health and behavioral patterns. An excess or deficiency in any one fluid could cause illness. This shift marked the beginning of humoralism as a structured theory rather than a collection of vague observations.
Blood was considered hot and wet, linking it to the season of spring and the element of air. It formed in the liver and produced a sanguine temperament characterized by enthusiasm and sociability. Yellow bile was hot and dry, associated with summer and fire. Found in the gallbladder, it created a choleric nature that was ambitious yet short-tempered. Black bile was cold and dry, tied to autumn and earth. Produced by the spleen, it led to melancholy, fear, and sickness. Phlegm was cold and wet, connected to winter and water. Located in the brain and lungs, it resulted in a reserved, forgetful disposition. Each humor had a distinct organ, season, and elemental quality. The balance between them determined whether a person remained healthy or fell ill. A mismatch in these qualities caused disease through what physicians called dyscrasia.
Galen of Pergamum lived from 129 AD to 201 AD and transformed humoral theory into a dominant medical doctrine. He linked the four bodily fluids to psychological temperaments and integrated them with Empedocles' classical elements. Galen believed that the interaction of these fluids governed human development and behavior. He mapped specific ages to seasons: infancy to spring, youth to summer, adulthood to autumn, and old age to winter. This framework allowed doctors to predict how environmental factors like wind or climate would affect patients. Cities exposed to hot winds were thought to suffer from digestive issues due to excess phlegm. Those in cold regions faced lung diseases and eye problems. Galen's authority ensured his version became the standard for over a millennium. His commentary on Hippocratic texts solidified the connection between physical fluids and mental states.
Bloodletting was already common by the first century AD but gained prominence after Galen declared blood the most prevalent humor. Physicians extracted volumes ranging from a few drops to several liters depending on the patient's condition. Purging and emetics were used to expel surplus bile or phlegm. Dietary adjustments aimed to counteract imbalances; warm foods produced yellow bile while cold foods generated phlegm. Apocroustics stopped malignant humors from flowing to diseased areas. Medications like apophlegmatisms were chewed to draw away excess phlegm. Arsenic poultices drew out plague symptoms. Chamomile reduced heat and lowered excessive bile. These treatments persisted until the 17th century when cellular pathology began challenging their validity. The goal remained restoring eucrasia, or equilibrium, through physical intervention.
Avicenna published The Canon of Medicine in 1025 during the Golden Age of Islam. He summarized the four humors and temperaments into a structured table for Persian and Arab physicians. His work preserved Greek knowledge while adapting it to new cultural contexts. Unani medicine in India and Pakistan still emphasizes these humoral principles today. Avicenna detailed how morbid states related to specific humors: inflammation became febrile, lassude indicated deficient energy, and insomnia signaled wakefulness issues. Foods and medicines were categorized as calefacients or infrigidants based on their effects. This transmission ensured that humoralism survived the decline of secular Greek culture in the Byzantine Empire. By the early ninth century, the theory experienced a revival due to changing social factors. It dominated European medical thinking until Andreas Vesalius challenged Galen's anatomical theories in 1543.
The theory of humorism fell out of favor in the 17th century as cellular pathology emerged. Advances in chemistry and microbiology provided evidence against the existence of named bodily fluids causing disease. The discovery of microbes definitively disproved the core premise by the mid-19th century. In 1858, no studies existed to prove or disprove the impact of organ dysfunction on temperament traits because such traits were not defined until the end of the 20th century. The Doctrine of Specific Etiology hastened its demise by asserting one precise cause for each sickness. Modern medicine now uses terms like humoral immunity to describe antibodies but this is unrelated to ancient fluid theories. Despite its fall from dominance, humoralism had governed Western thought for over two thousand years. Only pseudoscientific practices remain today.
Elizabethan playwright Ben Jonson wrote humor plays where character types reflected their humoral complexion. In The Taming of the Shrew, Petruchio used humoral therapy techniques on Katherina to tame her into a phlegmatic woman. He yelled at servants serving mutton, deprived Katherina of sleep, and forced them to endure cold walks home. These actions aimed to balance her choleric nature with colder environmental factors. The theory influenced Menander's comedies and Plautus' works before reaching Shakespeare's era. Rupert Thomson's 2005 novel Divided Kingdom features the four humors prominently in its narrative. Paintings, tapestries, and prints depicted the humors as popular iconographic themes throughout European history. Even modern literature occasionally references these archetypes when exploring personality and behavior.
Common questions
What are the four bodily fluids in humorism according to Hippocrates?
Hippocrates identified blood, phlegm, yellow bile, and black bile as the four specific bodily fluids. These substances dictated both physical health and behavioral patterns within the body.
When did Galen of Pergamum transform humoral theory into a dominant medical doctrine?
Galen of Pergamum lived from 129 AD to 201 AD and transformed humoral theory into a dominant medical doctrine. His authority ensured his version became the standard for over a millennium.
How does Avicenna's The Canon of Medicine relate to humoral principles?
Avicenna published The Canon of Medicine in 1025 during the Golden Age of Islam and summarized the four humors and temperaments into a structured table. His work preserved Greek knowledge while adapting it to new cultural contexts for Persian and Arab physicians.
Why did the theory of humorism fall out of favor in the 17th century?
The theory of humorism fell out of favor in the 17th century as cellular pathology emerged and provided evidence against the existence of named bodily fluids causing disease. Advances in chemistry and microbiology definitively disproved the core premise by the mid-19th century.
What is the connection between Ben Jonson's plays and humoral theory?
Elizabethan playwright Ben Jonson wrote humor plays where character types reflected their humoral complexion. In The Taming of the Shrew, Petruchio used humoral therapy techniques on Katherina to balance her choleric nature with colder environmental factors.