Reasons for War

I had lunch with a friend today. He said he doesn’t feel the war with Iraq is a just one. As we got talking, we discovered that we weren’t at all clear what the stated purpose of this war is. Is it:

-To enforce the 1991 agreement from the first Gulf War?
-To liberate the Iraqi people, in response to crimes against humanity?
-As a pre-emptive strike against a potential threat to the world?

Perhaps all three? Maybe part of the reason this war is so controversial is because we haven’t agreed on its purpose.