Roman Medicine: Between Science and Superstition
Roman medicine was Greek medicine operating in Latin. The systematic approach to understanding the body that the Romans inherited and developed had been established by Greek physicians — Hippocrates in the fifth century BC, whose school produced the first sustained attempt to explain disease through natural causes rather than divine intervention; Herophilus and Erasistratus in the third century BC, who performed human dissection at Alexandria and advanced anatomical knowledge beyond anything previously achieved. By the time Rome had absorbed the Greek world, Greek physicians were practicing in Roman cities, Greek medical texts were being translated and adapted, and the leading medical authority of the imperial period — Galen of Pergamon — wrote in Greek while practicing in Rome as physician to the emperors Marcus Aurelius, Commodus, and Septimius Severus.
Galen was the most influential physician in history if influence is measured by duration of authority. His comprehensive system — organized around the four humors (blood, phlegm, yellow bile, black bile) and the theory that health consisted in their proper balance — dominated European and Islamic medicine for fourteen centuries after his death. This longevity reflects both the genuine sophistication of his systematic approach and the absence of the experimental infrastructure that would have been required to dislodge it: without the means to test Galenic theory against careful controlled observation — the methodology that Vesalius and Harvey eventually applied in the sixteenth and seventeenth centuries — there was no mechanism to identify its errors. Galen was wrong about the liver as the seat of blood production, wrong about blood flowing back and forth rather than circulating, wrong about numerous anatomical details that animal dissection had obscured. He was right about a great deal else, and his clinical observations — on pulse, on prognosis, on the value of careful symptom assessment — were genuinely useful regardless of their theoretical framework.
Roman military medicine was among the most practically advanced in the ancient world, driven by the same organizational imperative that produced every other aspect of Roman military sophistication: maintaining a fighting force was an administrative problem, and medical care was part of its solution. Every legionary fortress had a valetudinarium — a hospital building — organized on a consistent plan, with individual wards, a surgical suite, and facilities for pharmacy and recovery. Army surgeons — medici — were professional specialists, not general soldiers with medical responsibilities. The surgical instruments recovered archaeologically from Roman military contexts are sophisticated: forceps, scalpels, bone saws, probes, and dilators that compare favorably with nineteenth-century surgical equipment in their design and evident precision.
The drugs available to Roman physicians were primarily botanical — an extensive pharmacopoeia of herbs, roots, and plant extracts whose effectiveness varied from the genuinely useful (willow bark, which contains salicin, an aspirin precursor; opium for pain management) to the neutral to the actively harmful. Dioscorides, a first-century Greek physician who served with Roman armies, compiled a pharmacopoeia — De Materia Medica — that catalogued approximately six hundred plants and their medical applications, organized not alphabetically but by therapeutic category. The work was used by physicians for fifteen centuries, which reflects both its comprehensiveness and the lack of a successor that substantially improved on it.
The relationship between medicine and religion in Roman practice was not one of opposition but of complementarity. The god Asclepius — adopted from the Greek Asklepios — presided over healing sanctuaries called Asclepia where patients slept in the hope of receiving healing dreams from the god. The most famous of these in the Roman world, on the Tiber Island in Rome, attracted patients alongside the regular physicians who practiced there; the two approaches coexisted rather than competing. A Roman who was ill might simultaneously consult a physician, make offerings to Asclepius, wear an amulet, and observe dietary prescriptions — combining empirical medical practice with religious and magical approaches in a pragmatic mixture that reflects the fundamental uncertainty of medical outcomes before germ theory and pharmacology.
What Roman medicine could and could not do defined the demographic context of the civilization. It could set broken bones, treat wounds, perform amputations and eye surgeries, manage chronic conditions with available pharmacology, and provide the kind of careful observation and prognosis that reduced the chaos of illness to something somewhat manageable. It could not understand or treat bacterial and viral infections at the level required to reduce epidemic mortality, which meant that the Antonine Plague and the Plague of Cyprian could kill millions of people while the most sophisticated physicians in the world had no effective response beyond supportive care and quarantine measures whose theoretical basis they did not understand. Roman medicine was the best medicine in the ancient world. That was not good enough to change the fundamental mortality picture, which is why Rome, like every pre-modern civilization, operated under demographic constraints that only the germ theory of disease would eventually loosen.