Final answer:
The Bush Doctrine refers to George W. Bush's foreign policy that supported using US military power to prevent perceived threats to national security, even without immediate support from other nations.
Step-by-step explanation:
The Bush Doctrine alludes to the foreign policy of George W. Bush that supported the use of US military power to prevent perceived threats to national security, even if those threats were not immediate and few or no other nations were willing to support these actions.
This doctrine was exemplified by President Bush's declaration of war on terrorism after the September 11 attacks. It justified preemptive military actions and the removal of hostile governments in favor of friendly, democratic regimes.
Some key components of the Bush Doctrine included the belief in the right of the United States to protect itself from terrorist acts and the willingness to engage in pre-emptive wars when deemed necessary to counter a credible threat to national security.