Turkey is a longstanding ally of the United States and Europe. After the demise of the Soviet empire, Turkey's strategic importance has changed but not diminished. Today Turkey is facing a completely different foreign and security policy environment. However, Turkey is also undergoing extraordinary internal change. Many established political truths of the Republic's seventy-five-year-long tradition are increasingly questioned by a growing part of its people. Above all, there is the rise of political Islam and the ensuing clash of ideologies between "secularists" and "Islamists" as well as the...