Well, some argue that if not the war itself then some of the decisions made by the US in Iraq in the aftermath of the war helped forming ISIS, such as, dismantling the Iraqi army [1].<p>[1] <a href="http:&#x2F;&#x2F;www.newyorker.com&#x2F;news&#x2F;news-desk&#x2F;did-george-w-bush-create-isis" rel="nofollow">http:&#x2F;&#x2F;www.newyorker.com&#x2F;news&#x2F;news-desk&#x2F;did-george-w-bush-cr...</a>