"Social scientists need not alter their definition of brainwashing, but should simply acknowledge that at least one contemporary ideological organization utilizes brainwashing in an attempt to retain its members. While this study cannot answer crucial questions about the long term implications for people who have been through this particular brainwashing program (compare Schein, 1961: 284), no doubt exists that Scientology's founder gave considerable thought to brainwashing techniques and imposed them on those of his followers whom he believed were harbouring thoughts or performing actions against him or the organization. The "brainwashing" term, therefore, has validity within some social science discourse."
January 1, 1970
https://en.wikiquote.org/wiki/Brainwashing