Events of September 11 and then US invasion of Afghanistan and Iraq resulted in wide formal and substantial alterations in political and security equilibriums of the Middle East, Persian Gulf and Northern Africa. These alterations have made dominant new atmosphere and circumstances, in the sense of elimination or emergence new regimes, changing the nature of actors’ making coalitions, changing the mental image, decision making, emerging new international era, and changing the power structure in the international system. By eliminating Sadam Hussein, US was trying to engineer a new government and power structure in Iraq, within which the nature of a new constitution is considerably important. The author believes that, on the one hand, the content of the new constitution in the new international order, which is linked more or less with the third wave of democracy, cannot lack modern elements and components. On the other hand, a strong tribalism with growing tendency towards separatism and a relatively strong religious differentiation between Shiites and Sunnis in Iraqwill turn the new constitution of Iraq into triangle of inconsistency and incompatibility.