<<This guy right here I would ask what he thinks the countries would want for their situations>>
I agree with Sachs on some things, like the need for sustainable development in "third world"-type countries, and to slow down global warming and other man-made assaults on the Earth's habitability. But where Ukraine is concerned, he just regurgitates Putin's lies -- just as Donald Trump does. Like the outrageous whopper that we overthrew a democratic government there and installed one more to our liking.
It's true enough that we and the Soviets both did a lot of that during the Cold War, and we "regime changed" Iraq and Afghanistan through military force under Bush, Cheney and their neocons. But in Ukraine, even after the breakup of the USSR and the end of the Cold War, it was Russia, not us, that installed a puppet president, Viktor Yanukovych (in what pretty much all Western observers, and even the Ukraine Supreme Court, agreed was a totally corrupt rigged election), who was later given the boot by the Ukrainian people and their parliament (the "Rada") in their 2014 "Revolution of Dignity", when he went behind their backs to try to sign an agreement with Putin essentially turning Ukraine into a Russian satellite state, like Belarus next door.
After which he ran to Moscow, where he still lives under Putin's protection.
In fact, the Rada had given him instructions to sign an agreement with the EU, which would have created closer political, economic, and cultural (but not military) ties with the democratic West. Ukraine might have liked to join NATO, but their application was turned down several times for different reasons. And it's obviously not going to happen in the midst of hostilities, which would immediately put us in WWIII.
Making Ukraine neutral is a great idea, except that Putin's idea of "neutrality" is a state dominated by Russia. Even worse in this case is that Putin considers Ukraine part of Russia, some kind of rebellious breakaway province, which it is not and never has been. It was part of the USSR, and earlier part of the Czarist Russian Empire, but by that reasoning the United States and India are still parts of Britain. Nor does the fact that some of Ukraine's eastern and southern provinces are predominantly Russian-speaking give Putin a right to seize them, any more than Hitler had a right to seize German-speaking parts of Czechoslovakia (the Sudetenland), France (the Rhineland), and other European countries in the 1930s -- including the entire German-speaking nation of Austria.
Appeasing Hitler only whetted his appetite for more, and led to his invading Poland and starting WWII. Just as it would if Putin was to rewarded for his invasion by being given parts of Ukraine. He plainly would not be satisfied with it. And in any case, that's not our, Russia's, or any other country's decision to make. Only Ukraine has the right to decide that for themselves.