Millions of people around the world marched on the eve of the Iraq war. When the war happened anyway, some people said: we marched and the war happened anyway. Therefore, protest doesn't change anything. That was drawing the wrong lesson.
History reveals several pathways to war; but, as the tension between the West and Iran revs up, two seem particularly relevant because of the lessons they offer for those seeking to contain the crisis.
It will come as a shock to most Americans, but no presidential candidate -- nor any candidate, nor any local, state or federal government -- has developed a contingency plan in the event of a protracted oil cut-off.