If trauma was psychologically incapacitating for a majority of people, the human race would have died out. Trauma usually happens to groups and recovery from it also happens in that same group. So I think what's happening in modern society is that people are getting traumatized in a group. And Auschwitz survivors don't talk about Auschwitz. They talk about it with other people who were there.
Journalist and author Sebastian Junger talks about his book Tribe with EconTalk host Russ Roberts. Junger explores the human need to be needed and the challenges facing many individuals in modern society who struggle to connect with others. His studies of communal connection include soldiers in a small combat unit and American Indian society in the nineteenth century.