Most important enabler(s) of Iraq invasion:

[Mayberry Machiavelli]

I've listed these in what I think is their approximate relative importance.

[wuushew]

1. U.S. Congress

even in some bizzaro world where we were actually inforcing a legal ruling of the U.N. security council, why would any sane person commit to action or the threat of action before any facts are established?

[Jack_DeLeon]

2. The American Public...

It seems that just before this thing started most people supported it.

[Guaranteed]

3. Yup.

That war happened because Americans are stupid.