Answer:
The Bush Doctrine or "Doctrine of Positive Aggression" is a term used to describe the various principles related to the foreign policy of President George W. Bush, declared as a consequence of the attacks of September 11, 2001. The phrase described initially the principle that the United States had the right to treat as terrorist the countries that sheltered or give aid to terrorist groups, and that later it was used as a justification for the invasion of Afghanistan.
Later, it included additional elements, such as the political controversy of preventive war, which argued that the United States should depose foreign regimes that represented a supposed threat to the security of the United States, even if that threat was not immediate (used to justify the invasion of Iraq).