Oh, and we can also get into peace enforcement as the UN failed to stop the Bosnian war, but NATO did once the US got serious, and NATO, not the UN, intervened in Kosovo.
So, when people say we need more peacekeeping, they are often implying more UN, less NATO and definitely when they say that we used to do peacekeeping with blue hats and all that but none since, ignoring Canadian contributions to NATO peacekeeping in Bosnia (1995-2004) and Kosovo (the mission continues, but Canada's contribution was always light there).
To be sure, there is a reason why Canada became less enthusiastic about UN PKO's: those missions often had confusing mandates, limited capabilities, unreliable partners, and lousy outcomes. Afghanistan looks bad in the rear view mirror, but when the Canadians asked for help, they always got it from the US, the British, and others (despite the alone in Kandahar mythology). How about Rwanda? UN not so good there with inadequate equipment, partners who pulled out immediately and on and on.
I am not saying the UN cannot do peacekeeping. What I am saying is that there is a tendency to suggest that the UN does peacekeeping and NATO does not. And that Canada does not do peacekeeping if it is not under a UN flag. Which is simply wrong. If one wants to argue that the UN does it better, go ahead, but don't say that Canada or country x is not doing peacekeeping because it is not led by one's favorite international organization.
The Venn diagram of UN, peacekeeping and NATO would have overlaps (UN PKO, NATO PKO, UN & NATO PKO, and PKO that is not NATO nor UN and NATO stuff that is neither of the other two, and UN stuff that is not of the other two).
So, that is my rant for the morning--that organizations and missions are not identical. Organizations do more than one thing, and missions can be done by multiple organizations. The UN could engage in counter-insurgency if it could get the votes. It did engage in a conventional war when the Soviets were silly enough to not be in the room (Korean War).
Nostalgia for blue helmets and handing out candy* to kids should not blind one about what the UN and NATO can and have done.
* Candy bars is an American term, apparently, not a Canadian one--thanks to my copy-editor