It has been more a matter of interviewing individuals who have perpetrated these acts and seeing whether it correlates backwards, so to speak.
That said, I would love for you to listen face to face to the people who have actually done the research. It's cutting-edge research, 2016. The folks who have done it are still around, so it would be great to hear from them. Every one of them spent a significant amount of time in their reports talking about exactly what you just voiced. I guess that's probably why it has taken so long to come to a causation rather than a correlation because of those exact things that you bring up.