Uniquely man

"Man is the only animal that deals in that
atrocity of atrocities, War. He is the only one
that gathers his brethren about him and goes
forth in cold blood and calm pulse to exterminate
his kind. He is the only animal that for sordid
wages will march out…and help to slaughter
strangers of his own species who have done him no
harm and with whom he has no quarrel. …And in the
intervals between campaigns he washes the blood
off his hands and works for "the universal
brotherhood of man" — with his mouth." - From
"What Is Man" -- Mark Twain(aka Samuel Clemens)

Do you suppose this yakking about the "universal
brotherhood of man" is the cause of the
blood that follows?

Nah. Couldn't be...

...or could it?