Rose Kennedy later said she knew nothing of the procedure until after it had been performed. Kathleen Kennedy reportedly researched the operation at her father’s request, spoke with a journalist named John White who told her the results were bad, and passed that assessment back to her mother: “nothing we want done for Rosie.” Rose reportedly told Kathleen she was glad to hear that. Joe Kennedy proceeded anyway.
Whether Rose’s later claim that she knew nothing was accurate, or whether it was a form of self-protection after the fact, is a question that the evidence does not definitively resolve. Larson, in her biography, argues that Rose must have known at least immediately after the surgery, and that her long silence on the subject reflects something more complex than genuine ignorance. But the historical record does not establish, in primary documents, what Rose Kennedy knew and when.
What is not in dispute is that Rosemary herself was not meaningfully consulted. Whether she was told what would happen to her, whether she understood it, whether anyone asked for her agreement — none of this appears in the available documentation. Given that her ability to process complex information and make decisions was already compromised by her intellectual disability, the concept of informed consent as it would be understood today was unlikely to have been applied in any form.
The Procedure
The lobotomy was performed in November 1941. The exact date is not established in the most reliable accounts; the NPS and most biographical sources give November 1941 without specifying a day.