Exactly! Thus, Canada shouldn't be in!
Sorry, couldn't resist.
Haha. Fair enough.
Although Canada would be fun to play as. Building igloos instead of cottages and Mounties instead of cavalry. Maybe a +1 from beaver fur. Maybe they could have a canoe instead of a work boat or something. They could even harvest maple syrup from forest tiles. They would also have some sort of diplomatic advantage due to increased politeness, however, to counter that, they are not capable of declaring war.
See, they provide for some interesting gameplay mechanics.