There is something so simple and obvious, which Putin and many of his associates would never truly understand: that there can be no significant pro-Russian elements within the Ukrainian elite. Lviv, Kiev, Kharkiv, and Odessa all feel that real integration with Moscow would put an end to the Ukrainian national project. That made it virtually certain that Ukraine, even if it had become engaged to Russia, would have fled its suitor just before the actual wedding. Thus, by flatly rejecting Putin's offer, Yanukovych is doing a service to Russia.

A Eurasian Union without Ukraine would still make perfect sense. It would remain a useful if modest, largely geo-economic exercise, quietly and more or less successfully managed by Moscow. It would save Russia from investing in an illusory "civilizational" project with a huge negative yield and a bitter disappointment in the end. It would let Russia focus on itself and eventually seek to modernize its own politico-economic system as well as find its appropriate place and role in the world. It would make it imperative that Russia evolves to become a multi-ethnic nation state rather than a posthumous version of the defunct empire.

The European Union, by welcoming Ukraine into an association with itself, would need to pay attention—and more—to make the association live up to at least the minimal expectations on the Dnieper. It would have to help Ukraine modernize its economy, legal system, and governance. It would have to use stimuli to help Ukraine make the right choices, and stick to them. Yanukovych, Tymoshenko, and others will be Europe's problems, as well as Ukraine's. Those who will rise to replace them with something more modern will seek Europe's support in their endeavor. This Ukraine would never fly to the Moon, but, hopefully, it might be a more predictable partner and even offer useful modernization lessons to Russia.

Ukraine's association with the EU, however, will be a process, not an event. Vilnius will be an important milestone, not a capstone. President Putin still thinks he has lost a battle, but not yet the campaign. Moscow will try harder, often working at cross-purposes with itself. Those will be useful mistakes, destroying the great illusion that, as Putin put it, Ukrainians and Russians are one people. They are close, but precisely because of this their differences matter—and the sooner the Kremlin realizes this, the more realistic—and more successful—Russia's foreign policy will become.