Much has been made in the news lately about whether soldiers are required to follow an illegal order. That got me thinking. Full disclosure: I am not a legal scholar, nor have I ever been in the military. So, I would not presume to tell you what constitutes an “illegal order.” I presume that is the kind of thing that has to be decided by a court of law. I am not trying to make a political point here for one side or the other. I just have an observation. One thought I keep coming back to with all the discussion is this: if you follow an illegal order, you might find yourself in the shoes of Lieutenant William Calley. Those of us who grew up during the Viet Nam War have the My Lai Massacre seared on our psyches. It was one of the most shameful chapters in American military history, and helped to galvanize the protests against the war. In 1968 a company of soldiers led by Lt. Calley entered the village of My Lai and slaughtered everyone they could find. These were unarmed civilian...