c. 1600 BCE · copied from a text far older
The body, observed
The Edwin Smith Papyrus works through forty-eight injuries in strict order, skull downward. Each case gets an examination, a diagnosis, and a verdict: an ailment I will treat, an ailment I will contend with, an ailment not to be treated. Almost no magic appears anywhere in it. This is a surgeon writing down what he saw.
~30est. at birth
c. 400 BCE · Kos
Disease becomes natural
The Hippocratic writers — some sixty texts by many hands — make one decisive move. On the Sacred Disease argues that epilepsy is no more divine than any other illness; it has a cause in the body. Unable to cure much, they build something more durable instead: prognosis. Watch the patient, record the course, learn what comes next.
~30est. at birth
1543 · Padua
The interior, drawn
Vesalius, twenty-eight, does his own dissections rather than reading Galen aloud while a barber cuts. Galen had dissected animals, so his sternum has seven segments and his heart has pores between the chambers — pores Vesalius could not find. De Humani Corporis Fabrica pairs the corrections with engraving, and anatomy becomes something you can study without opening a body.
~30est. at birth
1847–1867 · Vienna, London, Glasgow
The invisible cause
Semmelweis finds that washing hands in chlorinated lime collapses deaths in a Vienna maternity ward, and is disbelieved. Snow maps cholera deaths onto one Broad Street pump and has its handle removed. Pasteur supplies the mechanism; Lister acts on it, publishing antiseptic surgery in 1867. Medicine stops fighting bad air and starts fighting organisms.
~30global, 1870
1928–1945 · London and Oxford
Infection stops being fate
Fleming notices a contaminated plate where Penicillium has cleared a ring through the staphylococci — then cannot make enough of it to matter. A decade later Florey, Chain and Heatley at Oxford turn the observation into a manufacturable drug, in time for the war. A scratch, a birth, a chest infection each stop being plausible ways to die.
~35global, 1930
1953 · London and Cambridge
The instruction set
Photograph 51 — an X-ray diffraction image made in Rosalind Franklin's laboratory by her student Raymond Gosling — carries the geometry. Watson and Crick, shown it without her knowledge, publish the model in Nature that April. The body turns out to run on a legible four-letter text, copied into every cell, and copied imperfectly over time.
~47global, 1950
2003 · twenty laboratories, six countries
The text, read
Thirteen years and roughly three billion base pairs later, the Human Genome Project declares the sequence essentially complete — about ninety-two per cent of it. The remaining gaps were not closed until 2022. The first genome cost billions; within two decades, reading one costs less than a night in hospital.
~67global, 2000
1967 → today
Lifespan, engineered
Barnard transplants a human heart in 1967. Imaging makes diagnosis non-invasive, intensive care holds people through what used to kill them, and in 2000 the da Vinci system is cleared for general surgery — a surgeon now operating through four small ports from a console across the room. Medicine becomes extraordinarily good at repair: valves, joints, kidneys, corneas, arteries. The number keeps climbing.
~71global, 2010
Now · the open question
Lifespan, then healthspan
Repair extends life without always extending health. Global life expectancy is 73.2 years; healthy life expectancy is closer to 63 — roughly a decade spent in decline. So ageing itself is now treated as a process with mechanisms: senescent cells, epigenetic drift, mitochondrial decline. Biological-age clocks give it a readout. The question stops being how long we last, and becomes how long we last well.
73.2global, 2023
