On Sunday, Oct. 31, when a group of militants seized a church in Baghdad, killing and wounding scores of Iraqi Christians, it signaled yet another episode of unimaginable horror in the country since the U.S. invasion of March 2003. Every group of Iraqis has faced terrible devastation as a result of this war, the magnitude of which is only now beginning to be discovered.

True, the situation in Iraq was difficult prior to the war. Having visited the country in 1999, I can testify to this. But the hardship suffered by many Iraqis, especially political dissidents, was in some way typically characteristic of authoritarian and dictatorial regimes.

Iraq could, at that time, be easily contrasted with other countries living under similar hardships. But what has happened since the war can barely be compared to any other country or any other wars since World War II. Even putting aside the devastating death toll, the sheer scale of internal displacement and forced emigration is terrifying. This is a nation that had more or less maintained a consistent level of demographic cohesion for many generations. It was this cohesion that made Iraq what it was.