Because greed corrupts any system including communism.
Capitalism works because of greed and the concentration of power to a small group of people. But the more successful it is, the more inequality there is and eventually the system will fail .... for the majority not the minority.
Communism failed because of greed and the concentration of power to a small group of people. The more they concentrated power the more inequality there was and eventually the system failed.
The problem to any human system are humans .... conversely, the solution to and human system are humans.
We are our greatest ally and we are also our own worst enemy.
Communism failed because of greed and the concentration of power to a small group of people. The more they concentrated power the more inequality there was and eventually the system failed.
Your description is highly inaccurate to begin with, but for one moment I will put it aside. Is there no hand, in "failure", of Western colonialist powers forming what is called today NATO, and what is called Cold War, going on since post WW2? You think 20+ million Russians died to defeat Nazis out of no reason?
Also, how did the below happen, after Russia and China defeated Nazism?