My source is not the author, but the studies I cited. I don't know why you are talking to me about a document I haven't cited, but anyway, here we go again and I'll finish so as not to fall into the vicious circle that this is: literally the first study cited tells you about biological risk and emphasizes that most of the risk is associated with adverse environmental factors (child abuse, poverty, substance abuse, etc.

Enjoy Nostr 🫡