The core facts are settled (Tier 1: trepanation is the oldest documented surgery, practiced independently across nearly every inhabited continent, and healed bone around many openings proves patients survived, sometimes more than once); the exact survival rates, the balance of therapeutic versus ritual motive, and specific techniques are real but debated (Tier 2); the actual purpose behind any given operation, and the role of anesthesia or sedation, cannot be recovered from bone alone and stay genuinely open (Tier 3); and the claims that trepanation 'worked' as medicine by modern standards, or that it reflects lost advanced or non-human technology, are refused (Tier 4), because surviving the surgery is not the same as being cured by it. This article is history, not medical advice.

Trepanation: The Oldest Surgery

Thousands of years before writing, before metal tools or anesthesia, humans were cutting holes in the skulls of living people. The astonishing part is not that they did it, but that patients survived: healed bone around the openings proves it, across nearly every ancient culture. In late pre-Columbian Peru, survival may have topped ninety percent, better than Civil War cranial surgery. Humanity's oldest operation, what the evidence shows, why they did it, and why the wonder needs no ancient aliens.