There are literally dozens of modern democracies that have been free since WWII, how can that be too few "pairs"?
>> Certain, since the wars in the Balkans from the 1990s, the Democratic Peace theory is even less defensible than it was previously.
Uh, Soviet ended 1989. Then the Balkan got free -- and Jugoslavia fell relatively quickly into a civil war. How does that reflect on democracies?
(Are you defining "democracy" as "one free election, no power changes after consecutive free elections is needed"? That is hardly how the term is defined, last I checked either the democracy or the democratic peace theory.)