Alcoholics Anonymous (AA) is an established resource for people suffering from alcohol use disorder (AUD). However, Bill Wilson, the co-founder of AA, in his second letter to Jung referred to its low success rate. One evidence-based alternative, dating back to the 1950s, is the clinical use of lysergic acid diethylamide (LSD) for treating AUD. Bill Wilson was a strong advocate of using LSD as a preparation for alcoholics who had difficulty grasping the spiritual aspect of the 12-step programme. Bill Wilson wrote a "secret" four-page letter to Carl Jung detailing his own use of LSD and the success two psychiatrists in Canada had in treating alcoholics and asked for his advice on using LSD to help alcoholics. Aniela Jaffé, a Jungian analyst and co-worker of Jung, replied to Wilson on May 29, 1961, "… as soon as Dr. Jung feels better and has enough strength to begin again his mail, I will show it to him." Jung died a week later. This article quotes Jung's previous hostile opinions on psychedelics and asks: Just as Jung overcame his negative views on groups when giving "complete instructions" on extending the 12-step programme of AA to "general neurotics", might he similarly have changed his mind when he saw the documented success of using LSD with recalcitrant alcoholics?