Between 1957 and 1964, at a respected psychiatric hospital attached to McGill University in Montreal, a doctor tried to delete people. Not metaphorically. Dr. Donald Ewen Cameron believed he could erase a patient's existing mind — wipe away the memories, the habits, the self — and then write a healthier personality back onto the blank. He called the wiping 'depatterning' and the rewriting 'psychic driving.' The Central Intelligence Agency called the arrangement Subproject 68, and it paid for it. This is not a theory. It is in the Agency's own surviving files.

The documented machinery of it is genuinely hard to read. To 'depattern' a patient, Cameron put them through electroconvulsive therapy at doses many times the standard, multiple times a day, for weeks — a regimen that reliably stripped memory and reduced adults to a disoriented, incontinent, childlike state in which some forgot their own names, their families, how to use a toilet. He kept patients in drug-induced sleep for weeks or months at a stretch, using barbiturates and antipsychotics. Then came the 'psychic driving': recorded messages, sometimes a single emotionally charged sentence, played back through headphones or speakers on a loop — in some cases hundreds of thousands of repetitions over days, then weeks. The idea was that with the old self chemically and electrically erased, the looped message would imprint on the emptied mind. The patients, many of whom had come in for ordinary complaints like postpartum depression or anxiety, were never told any of this was experimental, and never told it was funded by a foreign intelligence service.

The reason any of this is provable rather than rumor is one of the strangest twists in intelligence history. In 1973, as the Watergate scandal closed in, CIA Director Richard Helms ordered the MKUltra files destroyed. But a cache of roughly twenty thousand documents — financial records misfiled in a separate storage area — survived the shredding and surfaced in 1977 under a Freedom of Information Act request by the writer John Marks. Those records, combined with the 1977 U.S. Senate hearings chaired by Edward Kennedy, exposed the whole program: more than 150 subprojects across dozens of institutions, drugs, hypnosis, and Cameron's depatterning work, formally identified as Subproject 68. The Agency had funneled the money through a front called the Society for the Investigation of Human Ecology so that Cameron and his staff never saw 'CIA' on a check.

The official goals are documented and chilling in their banality. MKUltra was the CIA's Cold War search for techniques of interrogation and behavior control — ways to extract information, build a 'truth serum,' and, in the program's own ambitions, control or rebuild a human mind, partly out of fear that the Soviets and Chinese had already done so. Cameron's clinic offered something almost no other site could: a steady supply of real patients who could be subjected to extreme procedures under the cover of treatment, with no protocols of consent that would have raised an objection. The cruelty was not a side effect of secrecy; secrecy was what made the cruelty possible.

A fair accounting has to note what is contested and what is not. That MKUltra existed, that Subproject 68 funded Cameron, that the techniques were used on non-consenting patients — none of that is in dispute; it is in declassified records and was acknowledged by the U.S. and Canadian governments, both of which co-funded Cameron's work, and both of which later paid settlements to survivors. What remains genuinely unknown is the human toll, because the operational records were destroyed. We do not have a reliable count of how many people passed through depatterning, how many were permanently damaged, or how many died. The surviving paper trail is a financial ledger, not a casualty list. Estimates of Cameron's patient numbers run to roughly a hundred; the true figure, and the true outcomes, burned in 1973.

There is a tendency to file MKUltra under lurid conspiracy — mind-controlled assassins, Manchurian candidates, the most cinematic version of the story. The records support something quieter and worse. There is no good evidence Cameron ever built a controllable human weapon; psychic driving, by every indication, did not work as advertised. What he reliably produced was wreckage: people who came in functional and left unable to remember their children, haunted for the rest of their lives by a 'treatment' they never agreed to. The horror is not that it succeeded. It is that it failed, on real people, with public money, and almost nobody answered for it.

The survivors and their families spent decades in court. Some Canadian patients won compensation; many never did, and Cameron — who served as president of the American Psychiatric Association and helped assess the sanity of Nazi defendants at Nuremberg — died in 1967 with his reputation intact, before the files ever came to light. Which leaves the question that the deliberate destruction of the records guaranteed we could never fully answer: if we only know what we know because a box of misfiled invoices escaped the shredder, what was in the documents that did not?