“He who joyfully marches to music in rank and file has already earned my contempt.
He has been given a large brain by mistake, since for him the spinal cord would fully suffice. This disgrace to civilization should be done away with at once. Heroism at command, senseless brutality, and all the loathsome nonsense that goes by the name of patriotism, how violently I hate all this, how despicable and ignoble war is....
It is my conviction that killing under the cloak of war is nothing but an act of murder.”
- Albert Einstein
So "Just say NO!" when some politician or businessman tells you to pick up a gun and kill.