What would you do if you were God?

You know what nobody has said, (that I know of) is that the justification for war could be reduced to "Because we can". There exists a giant power vacuum and the United States is slowly realizing the implications. The US can use this moment in history to shape the future as it pleases. Honestly, given the power it is ridiculous to not expect America to use it. If you had the ability to make the world a better place could you resist the urge to try? If you were Superman could you resist becoming a vigilante? If you were Superman would you have any moral course of action other than vigilantism? What would you say if Superman sat idly by while evil men caused havok and destruction in the world? What have people said about God for allegedly doing the same?
The danger should be obvious by now. America is powerful but not invulnerable. America is intelligent but not all-knowing. America is well-intentioned but not infallible. How can we be sure that the US will always be guided by the better nature of its leaders, especially since America has been governed by convenience in the past. This is where international law should step in and provide guidance. Unfortunately, leadership at the international level has been lacking. Ask yourself why a powerful nation should trust an organization to protect it's interests and the interest of smaller nations - because it is effective, benevolent and fair. The United Nations is none of these things. The United Nations is powerless to govern its member nations (witness the number of nations with alleged civil rights violations on the Security Council for instance) and unwilling to enforce it own rules. The UN is the problem. War isn't the solution but I have yet to see a better alternative.