Here's a book I have ordered. And/or watch the recent interview on UnHerd podcast, with this professor of psychology (and a psychoanalyst) in Belgium here.
As some of you may know, I have been also interested in collective psychological phenomenon (fear, anxiety, frustration, loneliness) as a social critic and as someone who does therapeuatic work--and, in fact, I have called myself a"cultural therapist" over the last few years. Desmet looks into research and theory explaining hyper-conformism and totalitarianism.
Note: I have written on mass psychosis in an FM blogpost: go to: https://fearlessnessmovement.ning.com/blog/mass-psychosis-menticide-fear-as-primer