"None of the examples you cite have ultimately not been successful"
All of them became successful to a degree - Russia moved from being a massive, semi-feudal mess to a leading industrial nation in a relatively short time, despite a devisive Civil participated in by 14 invading countries, a World War that produced the highest number of fatalities and casualty of all participating nations, a Cold War which forced it to turn in on itself and an appalling misjudgment on its own part in allowing a monster to take over State leadership
It was not the dream taht was flawed but the pursuit of that dream.
China, pretty well the same - a feudal State which has developed into a contender on the world stage - again - in the wrong hands for all sorts of reasons - not the dream.
Cuba is a virtual miracle in managing to survive next door to a hostile leading world power which has virtually blocked trade with the outside world since its inception, despite which, it has kept the U.S. at arms length (after 80 attempts to assassinate its leader).
Notably, education and medical care is top of the agenda in all of these countries.
Once a revolutionary step is taken, there are many factors in making sure that the outcome is a beneficial one, not all of which are within the control of the dreamers.
That is where education comes in.
Jim Carroll