A few thoughts on Giustino's article on spheres of influence.
"How is it that membership in a security alliance founded in 1949 is seen as the only way a state bordering the Russian Federation can survive?"
Because NATO is a codification of the military component of a Western alliance. The world is no longer separated into the spheres of superpowers, but it certainly is separated into spheres of value systems, and for all the differences that Provence might have with Alabama, the democratic West (involving Australia and Japan) would far rather stick together than take their chances with China, Russia or Iran. As the US continues its misguided imperialist adventures, Europe continues its 60-year policy of avoiding war at all costs, bar the surrender of its values (which is why there are German troops in Afghanistan and Swedish troops in Kosovo). Global diplomacy is a dance around the elephant of war, not talking about it outright, but letting the other guys know you're carrying a ten-gauge. In this situation, NATO is not so much an alliance as a statement of intent. NATO membership is an indication that the country has chosen a side, should an all-out conflict erupt. History may not be completely cyclical, but the war in Georgia has proven empirically that Russia is willing and able to attack, with military force, a country within its imagined sphere of influence. That the country in question poses no credible threat to Russia is irrelevant.
"Why should those pesky Estonians continue to poke the Russians in the eye, when they can just be good boys like Pekka up north?"
Because Pekka was in bed with Adolph. Yes, anyone who's studied history understands that it was a forced measure after the West abandoned Finland in the Winter War, and yes, the Finnish section of the siege of Leningrad was the one that let vital supplies through. But the independence of Finland is no proof whatsoever of Russia's ability to play nice with its neighbours. The Soviet Union did invade Finland, and it did win that war, albeit with a massive loss of life and resource! After the peace treaty, the Finns were under no illusion whatsoever that Stalin had a continued intention to fold Finland back into the Russian Empire, and only delayed this project because he had bigger problems to deal with, down south. Which is why they turned for assistance to the only force that seemed capable of stopping Russia - no matter how evil that force was. Just because Finland broke her alliance with the Third Reich at the first sign of Allied competence, early enough to be claimed by the West in return for abandoning most of the Austro-Hungarian empire, does not excuse the exceptional Norsemen's behaviour.
So we can either deny the Finnish model, and throw our lot in with America and Britain, and hope that there will be an Admiral Cowan around for the next blowout; or we can adopt the Finnish model, and open up a class at the Tartu Flight College dedicated to plowing Sukhoi Superjets into the Gazprom tower.