But it can still help if as many people as possible take the time to remember just how false the comparison actually is, and if they keep in mind that a keen sensitivity to the parallels between the past and the present is not always a good thing. When it comes to the moral lessons of the terrible years the world lived through between 1939 and 1945, particularly those of the Holocaust, we must always remember. But when it comes to the strategic lessons of that era, we might do well, sometimes, to forget.

David A. Bell is the Sidney and Ruth Lapidus Professor in the Era of North Atlantic Revolutions at Princeton University.

Image: Wikimedia Commons/A. L. Tarter