And how many nations would repeatedly murder each other on a near constant basis?

Note, this is a trick question. I didn't ask about "those nations", because that's the easy out. "Nations" in general means the one being asked has to now consider all the less well known ones who were wiped out and didn't get to make it into the history books as the next pet project for some AWFL singer who was bankrolled by her father from the get go.