I think you just need to look to defence policy: defence at home, defence of the continent, and defence of Canada's interests abroad. Peacekeeping, if we're going to use that word—peacekeeping or peace operations—falls into that third realm: defence of Canada's interests abroad.
Are we a G7 nation or not? Do we want to be influential around the world? Do we want to turn the tide on all these negative trends? That's the direction you have to take this in. We're a full player in the international community or we're not. We can close the doors and sit here fat, dumb, and happy in Canada, and this stuff probably won't visit us in our lifetimes. I think we have an obligation as citizens of the planet to engage, as our defence policy points out.