The Bush Doctrine is a belief that the United States had the right to remove perceived threats. The Bush Doctrine is actually a set of policies that were implemented in response to the 9/11 terrorists attacks. Implementation of this doctrine dictated that America would not distinguish between terrorists and those who harboured or aided them in conducting their attacks. As such the doctrine also justified pre-emptive attacks by saying that the United States would not wait for another attack in order to retaliate. Instead the U.S would attack any terrorist organization overseas before they had the chance to attack innocent people. The U.S would also proceed with this fight uniaterally in the event that multilateral organization would prove difficult to achieve.
