Dr. Margareta Griesz-Brisson MD, PhD, a world-renowned neurologist from Germany, warned that face masks cause oxygen deprivation and permanent neurological damage, especially in the developing brains of children.
https://archive.org/details/Carbon-Dioxide-Face-Masks
This is the long version of a study published previously as a short research letter by JAMA Pediatrics. (Walach, H., Weikl, R., Prentice, J., Diemer, A., Traindl, H., Kappes, A., & Hockertz, S. (2021)
https://old.reddit.com/r/conspiracy/comments/l8dab9/multiple_studies_show_the_dangers_of_face_masks/
https://archive.org/download/hiv-aids-fauci-documentary/oxygen-deprivation-torture.pdf
Many ancient civilizations forced their slaves or lower cast members to wear masks as a sign of subjugation and to dehumanize them, literally depriving them of facial expressions and emotion. I think that’s more the primary purpose, plus it’s a constant reminder to be scared of the coof and validation that others are complying just like you. But permanent brain damage is probably a nice cherry on top for the banker class.