A familiar name can hide many writers. “Hippocrates” refers both to a Greek physician and to a collection of medical works passed down under his name. Historian Jacques Jouanna makes that distinction at the start of his discussion of Hippocrates and religion (Jouanna, pp. 97–98). It changes the story: an argument in a Hippocratic book is not automatically something Hippocrates himself said.
The person behind the name
Hippocrates came from Kos, an island also spelled Cos in older English translations. His birth is conventionally placed around 460 BCE (Jouanna, p. 74 n. 31). The date is approximate; it should not turn a sparse biography into a detailed life story.
Plato’s Protagoras gives an early literary reference. Socrates asks a young man named Hippocrates to imagine paying his namesake, Hippocrates of Cos, to learn medicine. The physician is called an Asclepiad (Jowett translation, opening discussion). This is Documented as a portrayal in the dialogue, not a record of an actual enrollment.
It gives us a physician associated with teaching. It does not establish a school-opening date, prove a monopoly on medicine, or identify which surviving books he wrote.
A collection with several voices
The Hippocratic Corpus contains roughly sixty works. The National Library of Medicine describes several authors, writing across centuries, whose advice sometimes conflicts (NLM, “Greek Medicine”). “Corpus” simply means a body of writings.
Jouanna places most of these texts in the later fifth or early fourth century BCE, with others written later. He allows that some may be Hippocrates’ own work while emphasizing the lack of certain criteria for identifying them (Jouanna, pp. 97–98). Unknown authorship is different from proof that he wrote nothing.
That uncertainty is a reason to name individual texts. Their arguments remain available to examine even when the writer’s identity does not.
Natural causes did not erase the divine
On the Sacred Disease challenges the idea that the condition it discusses is uniquely sacred. The writer argues for natural causes, connects the condition with the brain, and proposes a hereditary explanation. Later passages connect mental experience with the brain (Adams translation). These are Documented historical arguments, not current medical explanations.
Yet the ending describes the causes as divine and diseases as both divine and human. The author’s bodily explanation did not require rejecting divinity. This is the same distinction discussed in this series’ article on spiritual and biological explanations: the text does not fit a simple choice between religion and biology.
The Oath makes the point another way. It opens by invoking healing gods, including Apollo and Asclepius. It also sets obligations toward teachers and students and includes a commitment concerning private information (Adams translation). Religious language and professional obligations appear together. A written oath tells us what its speaker promises, not whether every physician followed it.
Watching a case over time
In Epidemics I, observations are organized around particular people and successive days. The account of Philiscus records changes in fever, sweating, sleep and speech. Elsewhere, the writer lists circumstances to consider, including habits, seasons and the person’s surroundings (Adams translation, judgment passage and Case I).
The day-by-day structure is Documented. It shows attention to the course of illness without requiring us to call Hippocrates the inventor of observation or to treat the account as modern research. The text preserves a writer’s selection of details; it does not give Philiscus his own account.
Where the four humors belong
The familiar four-fluid theory appears clearly in The Nature of Man: blood, phlegm, yellow bile and black bile. Jouanna attributes the work to Polybus and describes its account of health as their proper mixture (Jouanna, p. 335). This attribution is Strongly supported in the specialist account and matches this series’ earlier treatment of the same subject.
Calling it simply “Hippocrates’ theory” hides that authorship question. Here it is a historical explanation to understand, not a model to use for care.
Readers beyond Greek
The writings also have a history of translation and teaching. NLM’s manuscript catalogue identifies Hunayn ibn Ishaq as the Arabic translator of the Hippocratic Prognostics. It describes a commentary on The Nature of Man by Ibn al-Nafis, with a certificate recording a student’s completion of its study in 1270 (catalogue).
These are specific traces of transmission: a translator, a commentary and a teaching record. They are firmer evidence than saying a single unchanged doctrine became the basis of everyone’s medicine.
How we know
What survives. Dialogues, medical writings, later manuscript records and scholarly comparisons.
Whose voices are missing. Patients appear through medical writers’ descriptions, rather than their own testimony.
What remains uncertain. Which works Hippocrates wrote, and how closely their claims matched daily practice.
Then vs. now
Then: Writers discussed bodily causes, observation, obligations and divinity in different ways.
Now: Reading their texts separately preserves those differences. It also prevents a famous name from receiving credit for every idea collected beneath it.