The Bush Doctrine is a phrase used to describe various related foreign policy principles of United States president George W. Bush. The phrase initially described the policy that the United States had the right to aggressively secure itself from countries that harbor or give aid to terrorist groups, which was used to justify the 2001 invasion of Afghanistan.
Later it came to include additional elements, including the controversial policy of preventive war, which held that the United States should depose foreign regimes that represented a potential or perceived threat to the security of the United States, even if that threat was not immediate; a policy of encouraging democracy around the world, especially in the Middle East, as a strategy for combating the spread of terrorism; and a willingness to pursue U.S. military interests in a unilateral way. Some of these policies were codified in a National Security Council text entitled the National Security Strategy of the United States published on September 20, 2002.
Click through for the full wikipedia entry. I have an idea for a bastardised version of the Doctrine causing the events that kick off my NaNoWriMo tale’s backstory.