Marshall Goldman, a leading Russia scholar, argues in a recent book that Mr. Putin has established a "petrostate," in which oil and gas are strategically deployed as punishments, rewards and threats. The author details the lengths to which Mr. Putin has gone to retain control over the delivery of natural gas from Central Asia to the West. A proposed alternative pipeline would skirt Russia and run through Georgia, as an oil pipeline now does. "If Georgia collapses in turmoil," Mr. Goldman notes, "investors will not put up the money for a bypass pipeline." And so, he concludes, Mr. Putin has done his best to destabilize the Saakashvili regime.

This brief interval of talk came to an abrupt end two summers ago, when Mr. Saakashvili sent troops to retake the Kodori Valley in Abkhazia -- in order, once again, to curb banditry (of which there was, in fact, a great deal). Both the Abkhaz and the Russians took this as a sign that Georgia was prepared to fight to regain its former province. Indeed, last year Mr. Saakashvili traveled to the Abkhaz border and promised a crowd of Georgian refugees that they would be back home within a year.

The breakaway regions were thus a stick of dynamite waiting to be lit. And Mr. Putin struck a match. Although Russia, as the peacekeeping power, was charged with preserving an international consensus that recognized Georgia's claims over Abkhazia, Russia lifted sanctions on Abkhazia last March. This had nothing to do with local events: Mr. Putin had tried for years to prevent Kosovo from declaring its independence from Serbia, and when the Kosovars went ahead, with strong American and European support, last February, Mr. Putin responded by leveling a blow at America's Caucasus darling.

Soon afterward, the Russian Duma held hearings on recognition of Abkhazia, South Ossetia and Transnistria, a pro-Russian breakaway republic in Moldova. Moscow argued that the West's logic on Kosovo should apply as well to these ethnic communities seeking to free themselves from the control of a hostile state. And then, in mid-April, Mr. Putin held out the possibility of recognition for the breakaway republics.

Now things began to degenerate rapidly.

When Kosovo won Western backing for its bid for independence from Russia's historical ally Serbia, the Kremlin answered by vowing to win similar status for South Ossetia and for the Black Sea enclave of Abkhazia, which fall inside Georgia's borders. Georgian leaders, meanwhile, hoped to quiet the conflict once and for all before applying for NATO membership.