Sadly enough, the West has failed Ukraine. The EU has become dependent on Russian oil and gas. London has long been a playground of the Russian oligarchs. When Russia annexed Crimea, the West turned a blind eye and abandoned Ukraine. Truth be told, the West tried to impose their values on to Russia, as it tried to do in the Middle East, and everywhere else to be quite fair, and the eastward extension of the EU caused Putin to become paranoid, but this is no reason to invade a country. With a track record of invading countries and territories in the Caucasus and annexing the Crimea, sanctions should have been imposed a lot earlier without imposing moral and cultural superiority and pointing one’s finger at Russia. Economic isolation post-2008/2009 (Russo-Georgian war and Second Chechen war) would have financially crippled Russia and an invasion would have been far too costly. An economic crisis would likely also have lead to a regime change. In essence, failed policies and diplomacy, which lead Russia to become paranoid, along with financial greed/economic dependency, created this situation.