THERE ARE no Russian tanks rumbling towards Tbilisi, the capital of Georgia, or Russian missiles flying over it—both things that happened during a five-day incursion in 2008 when the Kremlin attacked its former imperial vassal. But Georgia is still in mortal peril. The struggle between Soviet past and possible European future has already devastated Ukraine, and plunged Russia itself into a state of dictatorship. Now it has spread to the Caucasus, threatening Georgia’s democracy, its independence and its Euro-Atlantic calling.