It examines the reasons that Canada declined to take part in the 2003 US-led military mission in Iraq, shining a spotlight on the diplomatic tug of war that took place behind the scenes with our neighbours to the south, who have often adopted an interventionist foreign policy to serve their own economic and geopolitical interests. Canada’s historic refusal could have had disastrous consequences, but a number of key players and other analysts remind us of the terrible price we pay when diplomacy fails.