My brother sent me a quote from the documentary by Ken Burns on WWII.
"During that war they determined that the average individual could only be involved with the ground war for 240 days without completely losing their minds."
My brother adds that "only the military could quantify a number like that". He continues, " But the good news/bad news relative to that was that, the odds were highly against anyone making it 240 days without either being killed or injured."
How can we know numbers like this and still continue to have wars, rather than find solutions of peace. I have read that Ken Burns made this documentary to wake people up as to the effects of war. May it be so.