If you're speaking about the Iraq War that happened between 2003 and 2009, then I regret to inform you that we do not allow discussions of events after 1994. The truth is that the real reasons for the Iraq War is far more complicated than to simply simplify it to "oil" or "to remove Saddam Hussein". There won't be a proper consensus for another 20 or so years with historians. But you might have better luck with social science: /r/AskSocialScience.