On Dec. 7, the day of the Pearl Harbor attack in 1941 in Hawaii, the thoughts of many turn to wars, how they begin and the course they take.
Wars are like perpetual tornadoes: They may depart one place, but only to appear in another with the same ravaging force. War sacks the whole Earth.
Reviewing the ravages of the 20th century, what we we see is a century-long perfect storm. The scale of annihilation and depth of trauma from the constant warfare was, due to technology's destructive power, unprecedented in history.