It's certainly the case that Reagan sending Friedmanite "advisers" to the Russians botched the privatization process, massively increased the suffering of the Russian people and led to the current rotten oligarch/security state. Bush Sr and Clinton continued that policy.

We should have done a Marshall Plan for Russia. Instead, we sent them recent grads who were dim enough to have not only read Ayn Rand but to have believed that sad bullshit.

That doesn't in any way change the fact that we have no choice but to oppose the Russian attempt to seize control of Ukraine. That was a war of choice. Nobody held a gun to Putin's head and forced him to commit an act of imperialist aggression (well, two counting Crimea) against a smaller state. But if we'd treated the Russian people as friends, we could probably have avoided the rise of Putin.

Also, Sachs seems to buy into the idea that Russia, with the world's largest land area and world's longest border, is entitled to enslave adjacent countries to force them to be buffer zones between them and any other power. This is a mentality rooted in imperialism and is absurd on its face. If a Baltic state wants to join NATO, in order to get protection from the Russians attempting to annihilate their right to self-rule, what is the moral reason to tell them no?