very topical question PH ! And I'd love to hear from any of any N American's about this, as, I could be wrong here, there does seem to be a culture of revenge, or at least wanting revenge in N America. I'm sure there are lots of people who don't want revenge, are pacifists etc, but the message we get in the press is of a revengeful and angry society.
To me revenge is like being a spiteful brat, wanting to get their own back.
I see revenge as going into Iraq on trumped up "evidence" as pure revenge for 2001 twin Towers, I also see killing Bin Laden as a revengeful act
Justice would be going through the courts
:)