There is a third reason to have peacemakers in locations like Afghanistan.
The major lesson of WW2 was the "the best way to ultimately defeat an enemy is to make him your friend". Europe, which had been a battleground almost continuously since the dawn of recorded history, is now fully at peace, thanks to the Marshall Plan breaking the cycle of war, reparations, and revenge which had up to that point provided the engine for Europe's war machine.
The key part of "making your enemy your friend" is ensuring that he has the same opportunities and standard of living as you do. You must rebuild your enemy's country, set him back on his feet, and help him get through the transition from enemy to ally. It is no longer enough to defeat the enemy on the field of battle, and to destroy his infrastructure so that he can no longer rebuild his armies. In the post-Marshall world, military victory is only the halfway point.
This task is too important to be left undone, and while the Canadian Armed Forces may not be directly tasked with the rebuilding and greening of Afghanistan, they *are* tasked with maintaining security in the country so those who do face the rebuilding job can continue to function. The rebuilding mission must not fail, lest all the effort and lives expended to date be in vain, and any rebuilding effort cannot hope to function unless those who would see it fail are kept at bay.
This is a "long haul" mission - the rebuilding of Afghanistan is not a short-lived task. But much depends on it. Afghanistan is the place where the West must demonstrate its good faith to Islam; where the West must forge the first links of true friendship with the Middle East by demonstrating that there is more to the West than raining destruction on its enemies.
With the Americans preoccupied in Iraq, it falls to us to take the reins and see the mission through.
DG