Out of Iraq, Etc.!

Nearly a century ago, after four bloody years of World War I, British colonialists created the state of Iraq, complete with their hand-picked monarch. Britain and France were authorized — or, more precisely, authorized themselves — to create states in the Arab world, despite the prior British promise of independence in return for the Arabs’ revolt against the Ottoman Turks, which helped the Allied powers defeat the Central powers. And so European countries drew lines in the sand without much regard for the societies they were constructing from disparate sectarian, tribal, and ethnic populations....

History alone does not tell us what, if anything, outside powers should do now; there’s no going back in time. But we can say that without foreign interference, even a violent evolution of the region might have been far less violent than it has been during the last century. At least, the violent factions would not be seeking revenge against Americans.

It's all here.