"The idea of mind control flourished in pop culture, with movies like Invasion of the Body Snatchers and The Manchurian Candidate showing people whose minds were wiped and controlled by outside forces...By 1980 even the American Psychiatric Association had given it credence, including brainwashing under “dissociative disorders” in the Diagnostic and Statistical Manual of Mental Disorders-III."
Brainwashing

January 1, 1970