I strongly suggest that you take in William Safire's latest on how a good offense is The Best Defense. First, he starts with the basic underpinnings of the Bush Doctrine:
"That's the essence of our new policy of pre-emption as a last resort. If threatened by a regime harboring terrorists or likely to provide them with mass-murder weaponry, the U.S. will not wait to gain world sympathy as the victim, but will defend itself by striking first.
That power to protect ourselves — and our will to use that power — was established in Afghanistan and driven home in Iraq. Dangerous dictators elsewhere as well as fair-weather friends no longer doubt America's seriousness of purpose."
He then goes on to detail how many countries in the world seem to be edging a bit closer to the U.S.'s view on a variety of specific issues related to President Bush's much-maligned "Axis of Evil". All because of America demonstrating it's resolve with it's "unilateral" action against Iraq.
He wraps it up like this:
"If we steadily introduce free enterprise and the rule of law into a loose confederation; if we expect little gratitude from Iraqis exercising the freedom to complain loudly and a lot of carping from 'the little three' in Paris, Berlin and Moscow — then Americans could possibly achieve what seems as far-fetched as defeating fascism in the 40's and Communism in the 90's.
We could give liberty a chance to take root in the land of Job. Then our children may be able to lay down the burden of a great offense because there will be less need for a best defense."