It didn't help that the turks did nothing in Iraq to develop it. Irrigation and canals could be repaired, they just didn't do it, it seems.How about Baghdad? And I am not talking about the drop in population from the Iraq war but from the Mongols sack of the city in 1401. It was the modern cosmopolitan hub of the world at the time, what we would consider London to be today. The world leader in education, science and math. The city lost 80 % of it's population and it's irrigation canals were destroyed beyond repair. One could not think of a more tragic destruction of a major city.