Reconciliation in Iraq must start at the tribal level.
Lucky for Iraq that these local structures already exist to aid in the peace process. They can be like the "Truth and Reconciliation Commissions' of Rwanda and South Africa.
Tribes have already proved their worthiness in turning the tides in Iraq; they (the 'Sons of Iraq', or 'The Awakening'), not the surge as many politicians would like us to believe (see post on Bing West's great new book "The Strongest Tribe: War, Politics, and the Endgame in Iraq"), are responsible for the recent drawdown of violence.
Tribal incorporation into a state system will be required to maintain security in Iraq and therefore legitimize the state.