"Under the Banner of Heaven" explains this effect a bit. https://www.amazon.com/dp/B00CZCGPUA/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1 https://www.amazon.c

"Under the Banner of Heaven" explains this effect a bit. https://www.amazon.com/dp/B00CZCGPUA/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1 https://www.amazon.com/dp/B00CZCGPUA/ref=dp-kindle-redirect?...