There's also the connection to Art Brut, a term for outsider art which was popular around the same time. It is only in french that there are these connections

There's also the connection to Art Brut, a term for outsider art which was popular around the same time. It is only in french that there are these connections though, in english as well as many other languages it only has the harsh, violent meaning. This is all discussed in the documentaries I've linked elsewhere in this thread.