why not the United Nations?

Being a misinformed American, I was surprised that the President did not call on the United Nations to sue for a peaceful resolution of the wars going on in Columbia. I realize that the United Nations has been taken over by the United States and that the Treaty is a farce, but the United Nations is the vehicle for Peace even if they betray the Charter? For all the hypocracy, there are the members who know the score and can see the effort for what it is worth, if anything.