More and more American people are starting to express doubts about whether their country should go to war.
And lots of other countries don't think war is the answer.
There have also been protests against the war in countries like Brazil and Turkey.
But despite all this, the American government still insists the world would support it if it went to war with Iraq.
Top government bosses in America gave a list of reasons why they believe Iraqi leader Saddam Hussein is hiding secret weapons, which could kill thousands of people.
But other countries still think there's not enough evidence to justify a war at this stage.