There are two kinds of realists, Christopher Hitchens reminds us in a suburb analytical piece printed in Slate magazine, an on-line publication: real realists and fake realists.
“Many people write as if the sectarian warfare in Iraq was caused by coalition intervention. But it is surely obvious that the struggle for mastery has been going on for some time and was only masked by the apparently iron unity imposed under Baathist rule. That rule was itself the dictatorship of a tribal Tikriti minority of the Sunni minority and constituted a veneer over the divisions beneath, as well as an incitement to their perpetuation. The Kurds had already withdrawn themselves from this divide-and-rule system by the time the coalition forces arrived, while Shiite grievances against the state were decades old and had been hugely intensified by Saddam's cruelty. Nothing was going to stop their explosion, and if Saddam Hussein's regime had been permitted to run its course and to devolve (if one can use such a mild expression) into the successorship of Udai and Qusai, the resulting detonation would have been even more vicious.
“And into the power vacuum would have stepped not only Saudi Arabia and Iran, each with its preferred confessional faction, but also Turkey, in pursuit of hegemony in Kurdistan. In other words, the alternative was never between a tranquil if despotic Iraq and a destabilizing foreign intervention, but it was, rather, a race to see which kind of intervention there would be.”
The present crisis in Iraq has a pre-history and began in 1991: "…it was Saudi influence that helped convince President George H.W. Bush and Secretary of State James Baker to leave Saddam Hussein in power and to permit him to crush the Shiite intifada that broke out as his regime reeled from defeat in Kuwait. If, when reading an article about the debate over Iraq, you come across the expression "the realist school" and mentally substitute the phrase "the American friends of the Saudi royal family," your understanding of the situation will invariably be enhanced.”
Postmortems are always important. “How did we arrive at the rim of the volcano?” is not an idle question. But a correct answer to the question “How did we get here?” does not begin to address the larger and more important question “Having arrived, what are we to do now?”
There are only three possibilities: “The first is dictatorship by one faction or sect over all the others: a solution that has been exhausted by horrific failure. The second is partition, which would certainly involve direct intervention by all its neighbors to secure privileges for their own proxies and would therefore run the permanent risk of civil war. And the third is federalism, where each group would admit that it was not strong enough to dictate terms to the others and would agree to settle differences by democratic means. Quixotic though the third solution may seem, it is the only alternative to the most gruesome mayhem—more gruesome than anything we have seen so far. It is to the credit of the United States that it has at least continued to hold up this outcome as a possibility—a possibility that would not be thinkable if the field were left to the rival influences of Tehran and Riyadh.”
That is a dose of realism it would pay everyone to take to heart.