Surgery became medicine's first instrument of control once ether and antisepsis made it survivable. Surgeons learned what organs do by removing them, as Theodor Kocher did with the thyroid, and Charles Huggins starved prostate cancer of hormones. The same confidence produced the lobotomy, which also won a Nobel Prize. The episode ends at the knife's hard limit: it cannot reach a signal inside a cell.
Historians dispute who deserves credit for surgical anesthesia, whether Lister's figures proved antisepsis, and whether the 1949 Nobel Prize for the lobotomy should stand. Counts of lobotomies are estimates, and the fall from favor of the operation has several explanations.