I consider the modernization of the Middle East the central challenge of our time. This region behaves as if it were disturbed, if you'll excuse the clinical expression.

The terrorists want civil war. Al-Qaida is attacking Shiites. The Shiite militias are taking revenge on the Sunnis. And the Sunnis are become more extremist, with some joining al-Qaida.

Americans have eliminated Iran's worst enemies, the Taliban in Afghanistan and Saddam [Hussein]. I occasionally threatened my Iranian counterpart in Kabul that one day I would send him a big bill for what we did. But, seriously, Iran is pursuing a dual strategy in Iraq. On the one hand, the Iranians, after decades of hostility, are now interested in good relations. On the other hand, they want to keep the country weak and dominate the region.

The feeling of being an Iraqi unites all ethnic groups within this country. Even the Kurds, who have traditionally pushed for their own state, see the benefits of the current situation. They enjoy an autonomous status in Kurdistan, while at the same time participating in decisions in Baghdad. But if neighboring states were to push for a partition of Iraq, it would be a horrible mistake.

The Sunnis continue to see themselves, possibly for nostalgic reasons, as the most influential group and want a stronger central government - quite unlike minorities in other countries. The circumstances here are far more complex than many people in Washington imagine.

During the Cold War era, the issue was the containment of Soviet influence, and we tolerated many an authoritarian regime as long as they were useful to us in this respect.

The national unity government will need to implement a program that brings all Iraqis together, builds a happy future for the people of Iraq, and gets Iraq to stand on its own feet.