For many years, strategists have debated whether Turkey would be a "bridge" or a "gully" between predominantly Christian Europe and the Arab/Muslim Middle East. If Turkey were admitted to the European Union, it would be a bridge binding these two worlds. If it were kept out of the E.U., it could become a gully separating the two. It turns out that Turkey these days is neither a bridge nor a gully. It’s an island - an island of relative stability between two great geopolitical systems that are cracking apart: the euro zone that came into being after the cold war, and the Arab state system that came into being after World War I are both coming unglued.