Hippocrates

Hippocrates of Cos (Ἱπποκράτης) (c. 460–c. 370 BCE), probably born on the Mediterranean island of Cos (or Kos) off the west coast of present day Turkey, was a physician in ancient Greece on whom history bestowed the honorific cognomen, "The Father of Medicine", inasmuch as his contributions to medicine known through his writings, and those of his disciples (the 'Hippocratics') of about 200 years following his death, influenced Western medicine for some 2000 years. Hippocrates' life overlapped that of Socrates and Aristotle and spanned that of Plato, but historians know little of his personal life. History gave his name to an oath of medical ethics called the Hippocratic Oath.

Because historians know so little about the life of Hippocrates, and because of the great influence he and his disciples have had on medicine for millennia, his fame as a physician has led to a plethora of writings about him that have the character of legend:

We still know very little about Hippocrates. And yet, like the physicians of Imperial Rome, the doctors of our days want to know all about the life of the "Father of Medicine." Where there are no historical sources available, imagination will step in, and the poet will replace the historian.

Hippocrates founded a school of medicine known by his name, and advocated a basic approach to the diagnosis and treatment of disease that still has applications in modern medicine. "The code of conduct for doctors outlined in the Hippocratic Oath, a vow commonly taken by modern doctors", remains an ethical guideline in medicine.

The emergence of Hippocratic medicine

Early Greek medicine operated as a supernatural, magical art. The god of healing, Asclepius (Aesculapius in Roman terminology), whose priests and temples flourished in ancient Greece at least from the Homeric era, appeared in the dreams of the sick who came to the temple for 'sleep therapy'/ Asclepius gave advice to the dreamer, which the priests interpreted. The priests prescribed baths, diets, exercises, changes in occupation or living locales, and other routines, and those prescriptions received credit when cures occurred. The cult of ‘therapeutic dreaming’ persisted in places even into Christian times.

Hippocratic medicine developed as the "naturalistic counterpart" of the Asclepian supernaturalistic tradition. By the 6th century BCE (the 500s BCE) Greek philosophers emerged and began to theorize about the natural causes of the way the world worked. Empedocles (ca. 495-435 BCE), characterized as a physician and philosopher, postulated earth, air, fire and water as the primordial elements of which everything in the world consisted, in differing combinations and kinds of combinations, including the human body. 

Eventually, likely inspired by Empedocles’ concept of four elements making up natural things, the concept of four humours (blood, yellow bile, black bile, phlegm) as constituent elements of the human body emerged as part of the Hippocratic tradition, the individual humours in various combinations determining state of health and personality:

• excess blood makes a person ‘sanguine’, full of energy, optimistic, ruddy complexion
• excess yellow bile makes a person ‘bilious’, ‘choleric’, bad tempered, quick to anger, irritable
• excess black bile makes a person ‘melancholic’, deep and long-lasting sadness
• excess phlegm makes a person ‘phlegmatic’, unemotional, temperamentally slow, calm

Historians have not identified an individual who originated the four humours theory, nor have they excluded the possibility that the theory gradually emerged into a formal theory.

The medical corollary of Empedocles' theory is the identification of the traditional humours with constituent elements: what made this possible was the presence, in the traditional view of humours, of positive characteristics. Because of these characteristics it was easy to conceive the humours as the ingredients of man, upon which his normal or healthy state, as well as his very existence, depended….It is not the recognition of this or that humour as existing which counts, but the theoretical use to which that humour is put. One would therefore also have to find evidence….that the humours were regarded as constituent parts of the human body. There seems no a priori reason why this should not have been the case, in any writer working after say 450. But in the absence of such evidence, the question of the precise originator of the four-humoral theory is formally insoluble….What is perhaps of more interest is the way in which the theory of four humours exemplifies the stimulating effects of Greek philosophy on Greek medical science. It may be described in this way: the philosopher provides the categories within which the medical scientist can order his experience.” Page 61